#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2019, CISOfy
#
# Website  : https://cisofy.com
# Blog     : http://linux-audit.com
# GitHub   : https://github.com/CISOfy/lynis
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Name services
#
#################################################################################
#
    InsertSection "Name services"
#
#################################################################################
#
    BIND_RUNNING=0
    BIND_CONFIG_LOCS="${ROOTDIR}etc ${ROOTDIR}etc/bind ${ROOTDIR}usr/local/etc ${ROOTDIR}usr/local/etc/namedb"
    BIND_CONFIG_LOCATION=""
    POWERDNS_RUNNING=0
    POWERDNS_CONFIG_LOCS="${ROOTDIR}etc/powerdns ${ROOTDIR}usr/local/etc"
    POWERDNS_AUTH_CONFIG_LOCATION=""
    POWERDNS_AUTH_MASTER=0
    POWERDNS_AUTH_SLAVE=0
    UNBOUND_CONFIG_OK=0
    YPBIND_RUNNING=0
#
#################################################################################
#
    # Test        : NAME-4016
    # Description : Check main domain (domain <domain name> in /etc/resolv.conf)
    Register --test-no NAME-4016 --weight L --network NO --category security --description "Check /etc/resolv.conf default domain"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: check ${ROOTDIR}etc/resolv.conf for default domain"
        if [ -f ${ROOTDIR}etc/resolv.conf ]; then
            LogText "Result: ${ROOTDIR}etc/resolv.conf found"
            FIND=$(${AWKBINARY} '/^domain/ { print $2 }' ${ROOTDIR}etc/resolv.conf)
            if [ -z "${FIND}" ]; then
                LogText "Result: no default domain found"
                if IsVerbose; then Display --indent 2 --text "- Checking default DNS search domain" --result "${STATUS_NONE}" --color WHITE; fi
            else
                LogText "Result: found default domain"
                LogText "Output: ${FIND}"
                Report "resolv_conf_domain=${FIND}"
                Display --indent 2 --text "- Checking default DNS search domain" --result "${STATUS_FOUND}" --color GREEN
                RESOLV_DOMAINNAME="${FIND}"
            fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4018
    # Description : Check search domains in /etc/resolv.conf
    # Notes       : Maximum of one search keyword is allowed in /etc/resolv.conf
    Register --test-no NAME-4018 --weight L --network NO --category security --description "Check /etc/resolv.conf search domains"
    if [ ${SKIPTEST} -eq 0 ]; then
        COUNT=0
        LogText "Test: check ${ROOTDIR}etc/resolv.conf for search domains"
        if [ -f ${ROOTDIR}etc/resolv.conf ]; then
            LogText "Result: ${ROOTDIR}etc/resolv.conf found"
            FIND=$(${AWKBINARY} '/^search/ { print $2 }' ${ROOTDIR}etc/resolv.conf)
            if IsEmpty "${FIND}"; then
                LogText "Result: no search domains found, default domain is being used"
            else
                for ITEM in ${FIND}; do
                    LogText "Found search domain: ${ITEM}"
                    Report "resolv_conf_search_domain[]=${ITEM}"
                    COUNT=$((COUNT + 1))
                done
                # Warn if we have more than 6 search domains, which is maximum in most resolvers
                if [ ${COUNT} -gt 6 ]; then
                    LogText "Result: Found ${COUNT} search domains"
                    Display --indent 2 --text "- Checking search domains" --result "${STATUS_WARNING}" --color YELLOW
                    ReportWarning "${TEST_NO}" "Found more than 6 search domains, which is usually more than the maximum allowed number in most resolvers"
                else
                    LogText "Result: Found ${COUNT} search domains"
                    Display --indent 2 --text "- Checking search domains" --result "${STATUS_FOUND}" --color GREEN
                fi
            fi
            # Check amount of search domains (max 1)
            FIND=$(${GREPBINARY} -c "^search" ${ROOTDIR}etc/resolv.conf)
            if [ ! "${FIND}" = "0" -a ! "${FIND}" = "1" ]; then
                LogText "Result: found ${FIND} line(s) with a search statement (expecting less than 2 lines)"
                Display --indent 4 --text "- Checking search domains lines" --result "CONFIG ERROR" --color YELLOW
                ReportWarning "${TEST_NO}" "Found more than 1 search lines in /etc/resolv.conf, which is probably a misconfiguration"
            else
                LogText "Result: found ${FIND} line(s) with a search statement (expecting less than 2 lines)"
            fi
        else
            LogText "Result: ${ROOTDIR}etc/resolv.conf does not exist, skipping test"
            Display --indent 2 --text "- Checking search domains" --result "${STATUS_NOT_FOUND}" --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4020
    # Description : Check non default resolv.conf options
    Register --test-no NAME-4020 --weight L --network NO --category security --description "Check non default options"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: check ${ROOTDIR}etc/resolv.conf for non default options"
        if [ -f ${ROOTDIR}etc/resolv.conf ]; then
            LogText "Result: ${ROOTDIR}etc/resolv.conf found"
            FIND=$(${GREPBINARY} "^options" ${ROOTDIR}etc/resolv.conf | ${AWKBINARY} '{ print $2 }')
            if IsEmpty "${FIND}"; then
                LogText "Result: no specific other options configured in /etc/resolv.conf"
                if IsVerbose; then Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "${STATUS_NONE}" --color WHITE; fi
            else
                for ITEM in ${FIND}; do
                    LogText "Found option: ${ITEM}"
                    Report "resolv_conf_option[]=${ITEM}"
                    # TODO add suggestions for the related options
                    # rotate --> add performance tune point
                    # timeout --> add performance tune point when smaller than 3 seconds
                done
                Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "${STATUS_FOUND}" --color GREEN
            fi
        else
            LogText "Result: /etc/resolv.conf not found, test skipped"
            Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "${STATUS_NOT_FOUND}" --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4024
    # Description : Check Solaris uname -n output
    Register --test-no NAME-4024 --os Solaris --weight L --network NO --category security --description "Solaris uname -n output"
    if [ ${SKIPTEST} -eq 0 ]; then
        FIND=$(${UNAMEBINARY} -n)
        LogText "Result: 'uname -n' returned ${FIND}"
        Display --indent 2 --text "- Checking uname -n output" --result "${STATUS_DONE}" --color GREEN
    fi
#
#################################################################################
#
    # Test        : NAME-4026
    # Description : Check Solaris /etc/nodename
    # Notes       : If a system is standalone, /etc/nodename should contain a system name only, not FQDN
    Register --test-no NAME-4026 --os Solaris --weight L --network NO --category security --description "Check /etc/nodename"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: checking /etc/nodename"
        if [ -f /etc/nodename ]; then
            LogText "Result: file /etc/nodename exists"
            FIND=$(cat /etc/nodename)
            LogText "Output: ${FIND}"
            Display --indent 2 --text "- Checking /etc/nodename" --result "${STATUS_DONE}" --color GREEN
        else
            LogText "Result: file /etc/nodename could not be found"
            Display --indent 2 --text "- Checking /etc/nodename" --result "NONE FOUND" --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4028
    # Description : Check DNS domain name
    # To Do       : ${GREPBINARY} ^DOMAINNAME /etc/conf.d/domainname (remove "'s)
    Register --test-no NAME-4028 --weight L --network NO --category security --description "Check domain name"
    if [ ${SKIPTEST} -eq 0 ]; then
        DOMAINNAME=""
        LogText "Test: Checking if dnsdomainname command is available"
        if HasData "${DNSDOMAINNAMEBINARY}"; then
            FIND2=$(${DNSDOMAINNAMEBINARY} 2> /dev/null)
            if HasData "${FIND2}"; then
                LogText "Result: dnsdomainname command returned a value"
                LogText "Found domain name: ${FIND2}"
                DOMAINNAME="${FIND2}"
            else
                LogText "Result: dnsdomainname command returned no value"
            fi
        else
            LogText "Result: dnsdomainname binary not found, skip specific test"
        fi

        # If files and commands can't be found, use defined value from resolv.conf
        if [ -z "${DOMAINNAME}" ]; then
            if [ -n "${RESOLV_DOMAINNAME}" ]; then
                LogText "Result: using domain name from ${ROOTDIR}etc/resolv.conf"
                DOMAINNAME=${RESOLV_DOMAINNAME}
            else
                LogText "Result: using domain name from FQDN hostname (${FQDN})"
                DOMAINNAME=$(echo ${FQDN} | ${AWKBINARY} -F. '{print $2}')
            fi
        fi

        if [ -n "${DOMAINNAME}" ]; then
            LogText "Result: found domain name"
            Report "domainname=${DOMAINNAME}"
            Display --indent 2 --text "- Searching DNS domain name" --result "${STATUS_FOUND}" --color GREEN
            Display --indent 6 --text "Domain name: ${DOMAINNAME}"
        else
            Display --indent 2 --text "- Searching DNS domain name" --result "${STATUS_UNKNOWN}" --color YELLOW
            ReportSuggestion "${TEST_NO}" "Check DNS configuration for the dns domain name"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4032
    # Description : Check name service caching daemon (NSCD) status
    Register --test-no NAME-4032 --weight L --network NO --category security --description "Check nscd status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: checking nscd status"
        if IsRunning "nscd"; then
            NAME_CACHE_USED=1
            LogText "Result: nscd is running"
            Display --indent 2 --text "- Checking nscd status" --result "${STATUS_RUNNING}" --color GREEN
        else
            LogText "Result: nscd is not running"
            if IsVerbose; then Display --indent 2 --text "- Checking nscd status" --result "${STATUS_NOT_FOUND}" --color WHITE; fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4034
    # Description : Check name service caching daemon (Unbound) status
    Register --test-no NAME-4034 --weight L --network NO --category security --description "Check Unbound status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: checking Unbound (unbound) status"
        if IsRunning "unbound"; then
            UNBOUND_RUNNING=1
            NAME_CACHE_USED=1
            LogText "Result: Unbound daemon is running"
            Display --indent 2 --text "- Checking Unbound status" --result "${STATUS_RUNNING}" --color GREEN
        else
            LogText "Result: Unbound daemon is not running"
            if IsVerbose; then Display --indent 2 --text "- Checking Unbound status" --result "${STATUS_NOT_FOUND}" --color WHITE; fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4036
    # Description : Checking Unbound configuration file
    if [ ${UNBOUND_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4036 --preqs-met ${PREQS_MET}  --weight L --network NO --category security --description "Check Unbound configuration file"
    if [ ${SKIPTEST} -eq 0 ]; then
        FIND=$(which unbound-checkconf | grep -v "no [^ ]* in ")
        if [ ! "${FIND}" = "" ]; then
            LogText "Test: running unbound-checkconf"
            # Don't capture any output, just gather exit code (0 is fine, otherwise bad)
            FIND=$(unbound-checkconf > /dev/null 2>&1)
            if [ $? -eq 0 ]; then
                UNBOUND_CONFIG_OK=1
                LogText "Result: Configuration is fine"
                Display --indent 2 --text "- Checking configuration file" --result "${STATUS_OK}" --color GREEN
            else
                LogText "Result: Unbound daemon is not running"
                Display --indent 2 --text "- Checking configuration file" --result "NOT OK" --color YELLOW
                ReportWarning "${TEST_NO}" "Found Unbound configuration file issues (run unbound-checkconf)"
            fi
        else
            LogText "Result: skipped, can't find unbound-checkconf utility"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4202
    # Description : Check if BIND is running
    Register --test-no NAME-4202 --weight L --network NO --category security --description "Check BIND status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking for running BIND instance"
        if IsRunning "named"; then
            LogText "Result: found BIND process"
            Display --indent 2 --text "- Checking BIND status" --result "${STATUS_FOUND}" --color GREEN
            BIND_RUNNING=1
        else
            LogText "Result: BIND not running"
            if IsVerbose; then Display --indent 2 --text "- Checking BIND status" --result "${STATUS_NOT_FOUND}" --color WHITE; fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4204
    # Description : Check configuration file of BIND
    if [ ${BIND_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4204 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Search BIND configuration file"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Search BIND configuration file"
        for I in ${BIND_CONFIG_LOCS}; do
            if [ -f ${I}/named.conf ]; then
                BIND_CONFIG_LOCATION="${I}/named.conf"
                LogText "Result: found configuration file (${BIND_CONFIG_LOCATION})"
            fi
        done
        if [ -n "${BIND_CONFIG_LOCATION}" ]; then
            Display --indent 4 --text "- Checking BIND configuration file" --result "${STATUS_FOUND}" --color GREEN
        else
            Display --indent 4 --text "- Checking BIND configuration file" --result "${STATUS_NOT_FOUND}" --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4206
    # Description : Check BIND configuration file consistency
    if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4206 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check BIND configuration consistency"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: searching for named-checkconf binary"
        if [ ! "${NAMEDCHECKCONFBINARY}" = "" ]; then
            LogText "Result: named-checkconf is installed"
            FIND=$(${NAMEDCHECKCONFBINARY} ${BIND_CONFIG_LOCATION}; echo $?)
            if [ "${FIND}" = "0" ]; then
                LogText "Result: configuration file ${BIND_CONFIG_LOCATION} seems to be fine"
                Display --indent 4 --text "- Checking BIND configuration consistency" --result "${STATUS_OK}" --color GREEN
            else
                LogText "Result: possible errors found in ${BIND_CONFIG_LOCATION}"
                Display --indent 4 --text "- Checking BIND configuration consistency" --result "${STATUS_WARNING}" --color RED
                ReportWarning "${TEST_NO}" "Errors discovered in BIND configuration file"
            fi
        else
            LogText "Result: named-checkconf not found, skipping test"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4210
    # Description : Check if we can determine useful information from banner
    if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" -a ! "${DIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4210 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check DNS banner"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Trying to determine version from banner"
        FIND=$(${DIGBINARY} @localhost version.bind chaos txt | ${GREPBINARY} "^version.bind" | ${GREPBINARY} TXT | ${EGREPBINARY} "[0-9].[0-9].[0-9]*")
        if [ "${FIND}" = "" ]; then
            LogText "Result: no useful information in banner found"
            Display --indent 4 --text "- Checking BIND version in banner" --result "${STATUS_OK}" --color GREEN
            AddHP 2 2
        else
            LogText "Result: possible BIND version available in version banner"
            Display --indent 4 --text "- Checking BIND version in banner" --result "${STATUS_WARNING}" --color RED
            ReportWarning "${TEST_NO}" "Found BIND version in banner"
            ReportSuggestion "${TEST_NO}" "The version in BIND can be masked by defining 'version none' in the configuration file"
            AddHP 0 2
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4212 TODO
    # Description : Check version option in BIND configuration
    #if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" -a ! "${DIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    #Register --test-no NAME-4212 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check version setting in configuration"
#
#################################################################################
#
    # Test        : NAME-4220 TODO
    # Description : Check if we can perform a zone transfer of primary domain
    #Register --test-no NAME-4220 --weight L --network NO --category security --description "Check zone transfer"
    #if [ ${SKIPTEST} -eq 0 ]; then
#
#################################################################################
#
    # Test        : NAME-4222 TODO
    # Description : Check if we can perform a zone transfer of PTR (of primary domain)
    #Register --test-no NAME-4222 --weight L --network NO --category security --description "Check zone transfer"
    #if [ ${SKIPTEST} -eq 0 ]; then
#
#################################################################################
#
    # Test        : NAME-4230
    # Description : Check if PowerDNS is running
    Register --test-no NAME-4230 --weight L --network NO --category security --description "Check PowerDNS status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking for running PowerDNS instance"
        if IsRunning "pdns_server"; then
            LogText "Result: found PowerDNS process"
            Display --indent 2 --text "- Checking PowerDNS status" --result "${STATUS_RUNNING}" --color GREEN
            POWERDNS_RUNNING=1
        else
            LogText "Result: PowerDNS not running"
            if IsVerbose; then Display --indent 2 --text "- Checking PowerDNS status" --result "${STATUS_NOT_FOUND}" --color WHITE; fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4232
    # Description : Check PowerDNS configuration file
    if [ ${POWERDNS_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4232 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Search PowerDNS configuration file"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Search PowerDNS configuration file"
        for DIR in ${POWERDNS_CONFIG_LOCS}; do
            if [ -f ${DIR}/pdns.conf ]; then
                POWERDNS_AUTH_CONFIG_LOCATION="${DIR}/pdns.conf"
                LogText "Result: found configuration file (${POWERDNS_AUTH_CONFIG_LOCATION})"
            fi
        done
        if HasData "${POWERDNS_AUTH_CONFIG_LOCATION}"; then
            Display --indent 4 --text "- Checking PowerDNS configuration file" --result "${STATUS_FOUND}" --color GREEN
        else
            Display --indent 4 --text "- Checking PowerDNS configuration file" --result "${STATUS_NOT_FOUND}" --color YELLOW
        fi
    fi
#
#################################################################################
#
#    # Test        : NAME-4234
#    # Description : Check PowerDNS configuration file consistency
#    if [ ${POWERDNS_RUNNING} -eq 1 -a ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
#    Register --test-no NAME-4234 --weight L --network NO --category security --description "Check PowerDNS configuration consistency"
#    if [ ${SKIPTEST} -eq 0 ]; then
#    fi
#
#################################################################################
#
    # Test        : NAME-4236
    # Description : Check PowerDNS server backends
    if [ ${POWERDNS_RUNNING} -eq 1 -a ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4236 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PowerDNS backends"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking for PowerDNS backends"
        FIND=$(${AWKBINARY} -F= '/^launch/ { print $2 }' ${POWERDNS_AUTH_CONFIG_LOCATION})
        if HasData "${FIND}"; then
            for ITEM in ${FIND}; do
                LogText "Found backend: ${ITEM}"
            done
            Display --indent 4 --text "- Checking PowerDNS backends" --result "${STATUS_FOUND}" --color GREEN
        else
            LogText "Result: no PowerDNS backends found"
            Display --indent 4 --text "- Checking PowerDNS backends" --result "${STATUS_NOT_FOUND}" --color YELLOW
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4238
    # Description : Check PowerDNS authoritative status
    if [ ${POWERDNS_RUNNING} -eq 1 -a -n "${POWERDNS_AUTH_CONFIG_LOCATION}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4238 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PowerDNS authoritative status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking for PowerDNS master status"
        FIND=$(${GREPBINARY} "^master=yes" ${POWERDNS_AUTH_CONFIG_LOCATION})
        if [ -n "${FIND}" ]; then
            LogText "Found master=yes in configuration file"
            Display --indent 4 --text "- PowerDNS authoritative master: YES"
            POWERDNS_AUTH_MASTER=1
        else
            LogText "Result: most likely not master (no master=yes)"
            Display --indent 4 --text "- PowerDNS authoritative master: NO"
        fi
        LogText "Test: Checking for PowerDNS slave status"
        FIND=$(${GREPBINARY} "^slave=yes" ${POWERDNS_AUTH_CONFIG_LOCATION})
        if [ -n "${FIND}" ]; then
            LogText "Found slave=yes in configuration file"
            Display --indent 4 --text "- PowerDNS authoritative slave: YES"
            POWERDNS_AUTH_SLAVE=1
        else
            LogText "Result: most likely not slave (no slave=yes)"
            Display --indent 4 --text "- PowerDNS authoritative slave: NO"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4304
    # Description : Check NIS ypbind daemon status
    Register --test-no NAME-4304 --weight L --network NO --category security --description "Check NIS ypbind status"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking status of ypbind daemon"
        if IsRunning "ypbind"; then
            LogText "Result: ypbind is running"
            Display --indent 2 --text "- Checking ypbind status" --result "${STATUS_FOUND}" --color GREEN
            YPBIND_RUNNING=1
            if IsRunning "ypldap"; then
                LogText "Result: ypldap is running"
                Display --indent 2 --text "- Checking ypldap status" --result "${STATUS_FOUND}" --color GREEN
            else
                ReportSuggestion "Disable the usage of NIS/NIS+ and use an alternative like LDAP or Kerberos instead"
            fi
        else
            LogText "Result: ypbind is not active"
            if IsVerbose; then Display --indent 2 --text "- Checking ypbind status" --result "${STATUS_NOT_FOUND}" --color WHITE; fi
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4306
    # Description : Check NIS domain
    # Notes       : FreeBSD: sysctl kern.domainname
    if [ ${YPBIND_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4306 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check NIS domain"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking $(domainname) for NIS domain value"
        FIND=$(${DOMAINNAMEBINARY} | ${GREPBINARY} -v "(none)")
        if [ -n "${FIND}" ]; then
            LogText "Value: ${FIND}"
            NISDOMAIN="${FIND}"
        else
            LogText "Result: no NIS domain found in command output"
        fi
        # Solaris / Linux style
        LogText "Test: Checking file ${ROOTDIR}etc/defaultdomain"
        if [ -f ${ROOTDIR}etc/defaultdomain ]; then
            LogText "Result: file ${ROOTDIR}etc/defaultdomain exists"
            FIND2=$(cat ${ROOTDIR}etc/defaultdomain)
            if [ -n "${FIND2}" ]; then
                LogText "Output: ${FIND2}"
                NISDOMAIN="${FIND2}"
            else
                LogText "Result: no NIS domain found in file"
            fi
        fi
        # Red Hat style
        LogText "Test: checking ${ROOTDIR}etc/sysconfig/network"
        if [ -f ${ROOTDIR}etc/sysconfig/network ]; then
            LogText "Result: file ${ROOTDIR}etc/sysconfig/network exists"
            LogText "Test: checking NISDOMAIN value in file"
            FIND3=$(${GREPBINARY} "^NISDOMAIN" ${ROOTDIR}etc/sysconfig/network | ${AWKBINARY} -F= '{ print $2 }' | ${SEDBINARY} 's/"//g')
            if [ -n "${FIND3}" ]; then
                LogText "Found NIS domain: ${FIND3}"
                NISDOMAIN="${FIND3}"
            else
                LogText "Result: No NIS domain found in file"
            fi
        else
            LogText "Result: file ${ROOTDIR}etc/sysconfig/network does not exist"
        fi

        if [ ! "${SYSCTLBINARY}" = "" ]; then
            # Check sysctl (e.g. FreeBSD)
            LogText "Test: checking sysctl for kern.domainname"
            FIND=$(${SYSCTLBINARY} -a 2>&1 | ${GREPBINARY} "^kern.domainname" | ${AWKBINARY} -F: '{ print $2 }' | ${SEDBINARY} 's/ //g' | ${GREPBINARY} -v "^$")
            if [ ! "${FIND}" = "" ]; then
                LogText "Result: found NIS domain via sysctl"
                NISDOMAIN="${FIND}"
            fi
        fi
        # Check if we found any NIS domain
        if [ -n "${NISDOMAIN}" ]; then
            LogText "Found NIS domain: ${NISDOMAIN}"
            Report "nisdomain=${NISDOMAIN}"
            Display --indent 4 --text "- Checking NIS domain" --result "${STATUS_FOUND}" --color GREEN
        else
            LogText "Result: No NIS domain found"
            Display --indent 4 --text "- Checking NIS domain" --result "${STATUS_UNKNOWN}" --color YELLOW
        fi
    fi
#
#################################################################################
#
    if [ -f ${ROOTDIR}etc/hosts ]; then
        Display --indent 2 --text "- Checking /etc/hosts"
    else
        LogText "Result: no /etc/hosts file found"
    fi

    # Test        : NAME-4402
    # Description : Check /etc/hosts configuration
    if [ -f ${ROOTDIR}etc/hosts ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4402 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check duplicate line in /etc/hosts"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: check duplicate line in ${ROOTDIR}etc/hosts"
        OUTPUT=$(${AWKBINARY} '{ print $1, $2 }' ${ROOTDIR}etc/hosts | ${EGREPBINARY} -v '^(#|$)' | ${EGREPBINARY} "[a-f0-9]" | ${SORTBINARY} | ${UNIQBINARY} -d)
        if [ -z "${OUTPUT}" ]; then
            LogText "Result: OK, no duplicate lines found"
            Display --indent 4 --text "- Duplicate entries in hosts file" --result "${STATUS_NONE}" --color GREEN
        else
            LogText "Found duplicate line: ${OUTPUT}"
            LogText "Result: found duplicate line"
            Display --indent 4 --text "- Duplicate entries in hosts file" --result "$STATUS_FOUND}" --color YELLOW
            ReportSuggestion "${TEST_NO}" "Remove duplicate lines in ${ROOTDIR}etc/hosts"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4404
    # Description : Check /etc/hosts contains an entry for this server name
    if [ -f ${ROOTDIR}etc/hosts ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4404 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check /etc/hosts contains an entry for this server name"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Check /etc/hosts contains an entry for this server name"
        if [ -n "${HOSTNAME}" ]; then
            DATA=$(${EGREPBINARY} -v '^(#|$|^::1\s|localhost)' ${ROOTDIR}etc/hosts | ${GREPBINARY} -i ${HOSTNAME})
            if [ -n "${DATA}" ]; then
                LogText "Result: Found entry for ${HOSTNAME} in ${ROOTDIR}etc/hosts"
                Display --indent 4 --text "- Presence of configured hostname in /etc/hosts" --result "${STATUS_FOUND}" --color GREEN
            else
                LogText "Result: No entry found for ${HOSTNAME} in ${ROOTDIR}etc/hosts"
                Display --indent 4 --text "- Presence of configured hostname in /etc/hosts" --result "${STATUS_NOT_FOUND}" --color YELLOW
                ReportSuggestion "${TEST_NO}" "Add the IP name and FQDN to /etc/hosts for proper name resolving"
                LogText "Risk: No entry for the server name [hostname] in /etc/hosts may cause unexpected performance problems for local connections"
            fi
        else
            LogText "Result: Skipping test, no hostname configured"
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4406
    # Description : Check server hostname mapping
    if [ -n "${HOSTNAME}" -a -f ${ROOTDIR}etc/hosts ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no NAME-4406 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check server hostname mapping"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Check server hostname not locally mapped in ${ROOTDIR}etc/hosts"
        DATA=$(${EGREPBINARY} -v '^(#|$)' ${ROOTDIR}etc/hosts | ${EGREPBINARY} '^(localhost|::1)\s' | ${GREPBINARY} -w ${HOSTNAME})
        if [ -n "${DATA}" ]; then
            LogText "Result: Found this server hostname mapped to a local address"
            LogText "Output: ${DATA}"
            Display --indent 4 --text "- Hostname mapped to localhost" --result "${STATUS_FOUND}" --color YELLOW
            LogText "Information: Linking the hostname to the localhost entry may break some resolving. Split resolving so that localhost resolves back to 127.0.0.1 (and ::1) and the hostname of the machine to the real IP address on the network interface."
            ReportSuggestion "${TEST_NO}" "Split resolving between localhost and the hostname of the system"
        else
            LogText "Result: this server hostname is not mapped to a local address"
            Display --indent 4 --text "- Hostname mapped to localhost" --result "${STATUS_NOT_FOUND}" --color GREEN
        fi
    fi
#
#################################################################################
#
    # Test        : NAME-4408
    # Description : Check localhost entry
    if [ -n "${GETENT_BINARY}" ]; then PREQS_MET="YES"; SKIPREASON="No getent binary"; else PREQS_MET="NO"; SKIPREASON=""; fi
    Register --test-no NAME-4408 --preqs-met ${PREQS_MET} --skip-reason "${SKIPREASON}" --weight L --network NO --category security --description "Check localhost entry"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Check server hostname not locally mapped in /etc/hosts"
        FIND=$(${GETENT_BINARY} hosts localhost | ${AWKBINARY} '{print $1}' | ${SORTBINARY} | ${TRBINARY} -d '\n')
        if [ "${FIND}" = "127.0.0.1" ]; then
            LogText "Result: localhost mapped to 127.0.0.1"
            Display --indent 4 --text "- Localhost mapping to IP address" --result "${STATUS_OK}" --color GREEN
            Report "localhost-mapped-to=${FIND}"
        elif [ "${FIND}" = "::1" ]; then
            LogText "Result: localhost mapped to ::1"
            Display --indent 4 --text "- Localhost mapping to IP address" --result "${STATUS_OK}" --color GREEN
            Report "localhost-mapped-to=${FIND}"
        elif [ "${FIND}" = "127.0.0.1::1" ]; then
            LogText "Result: localhost mapped to 127.0.0.1 and ::1"
            Display --indent 4 --text "- Localhost mapping to IP address" --result "${STATUS_OK}" --color GREEN
            Report "localhost-mapped-to=${FIND}"
        else
            LogText "Output: ${FIND}"
            LogText "Result: this server hostname is not mapped to a local address"
            Display --indent 4 --text "- Localhost mapping to IP address" --result "${STATUS_SUGGESTION}" --color YELLOW
            LogText "Information: Ensure that localhost resolves back to 127.0.0.1 (and/or ::1)."
            ReportSuggestion "${TEST_NO}" "Split resolving between localhost and the hostname of the system" "/etc/hosts" "text:Check your localhost line"
        fi
    fi
#
#################################################################################
#

Report "name_cache_used=${NAME_CACHE_USED}"
WaitForKeyPress

#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com