Merge pull request #30 from Samson-W/master
Fix some bugs and apply rsyslog server
This commit is contained in:
Samson.W
GitHub
commit
7e2bf1c5b5
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@ -148,6 +148,12 @@ user.* -/var/log/user.log
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```
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The log will be output to the file /var/log/harbian-audit.log.
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If you apply docs/configurations/etc.iptables.rules.v4.sh to your firewall rules, and want to print the iptables log to a separate log file, insert the following lines to rsyslog.conf:
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```
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:msg,contains,"FW-" -/var/log/firewalllog.log
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& stop
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```
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## After remediation (Very important)
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When exec --apply and set-hardening-level are set to 5 (the highest level), you need to do the following:
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@ -6,6 +6,7 @@
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#
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# 8.1.1.9 Set space left for auditd service (Scored)
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# If the value of the "space_left" keyword is set to more than 25 percent of the total partition size, this is a finding.
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# Author : Samson wen, Samson <sccxboy@gmail.com>
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#
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@ -34,7 +35,7 @@ audit () {
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FNRET=3
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else
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SETSIZE=$(grep "^space_left.=.*" $FILE | awk '{printf $3}')
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if [ "${SETSIZE}" -lt "${LEFTSIZE}" ]; then
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if [ "${SETSIZE}" -gt "${LEFTSIZE}" ]; then
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crit "Space left value: ${SETSIZE} is more than audit log filesystem 25%"
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FNRET=4
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else
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@ -84,7 +84,11 @@ check_config() {
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-a always,exit -F dir=/etc/sysconfig/ip6tables -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/sysconfig/ip6tables-config -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/sysconfig/iptables-config -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change'
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-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/rsyslog.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/audisp/plugins.d/au-remote.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/logrotate.conf -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/logrotate.d/ -F perm=wa -k config_file_change'
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# Debian
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else
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AUDIT_PARAMS='-a always,exit -F path=/etc/audisp/audisp-remote.conf -F perm=wa -k config_file_change
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@ -99,7 +103,11 @@ check_config() {
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-a always,exit -F dir=/etc/profile.d/ -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/security/ -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/iptables/ -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change'
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-a always,exit -F path=/etc/sysctl.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/rsyslog.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/audisp/plugins.d/au-remote.conf -F perm=wa -k config_file_change
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-a always,exit -F path=/etc/logrotate.conf -F perm=wa -k config_file_change
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-a always,exit -F dir=/etc/logrotate.d/ -F perm=wa -k config_file_change'
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fi
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}
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@ -43,18 +43,18 @@ $IPT -A INPUT -p icmp -m state --state ESTABLISHED -j ACCEPT
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$IPT -A INPUT -p icmp -m state --state RELATED -j ACCEPT
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$IPT -A INPUT -m limit --limit 3/min -j LOG --log-prefix "SFW2-IN-ILL-TARGET " --log-tcp-options --log-ip-options
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$IPT -A INPUT -m limit --limit 3/min -j LOG --log-prefix "FW-SFW2-IN-ILL-TARGET " --log-tcp-options --log-ip-options
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$IPT -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT
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$IPT -A FORWARD -m limit --limit 3/min -j LOG --log-prefix "SFW2-FWD-ILL-ROUTING " --log-tcp-options --log-ip-options
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$IPT -A FORWARD -m limit --limit 3/min -j LOG --log-prefix "FW-SFW2-FWD-ILL-ROUTING " --log-tcp-options --log-ip-options
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for PUB_IF in $PUB_IFS
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do
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# sync
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$IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Drop Syn"
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$IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Drop-Syn "
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$IPT -A INPUT -i ${PUB_IF} -p tcp ! --syn -m state --state NEW -j DROP
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# Fragments
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$IPT -A INPUT -i ${PUB_IF} -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Fragments Packets"
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$IPT -A INPUT -i ${PUB_IF} -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Fragments Packets "
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$IPT -A INPUT -i ${PUB_IF} -f -j DROP
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@ -62,15 +62,15 @@ do
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL ALL -j DROP
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "NULL Packets"
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-NULL Packets "
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL NONE -j DROP # NULL packets
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "XMAS Packets"
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-XMAS Packets "
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP #XMAS
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "Fin Packets Scan"
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "FW-Fin Packets Scan "
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags FIN,ACK FIN -j DROP # FIN packet scans
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$IPT -A INPUT -i ${PUB_IF} -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
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@ -91,19 +91,23 @@ do
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$IPT -A INPUT -p udp --dport 68 -m state --state NEW -j ACCEPT
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# $IPT -A INPUT -p tcp --dport 80 -m state --state NEW -j ACCEPT
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# $IPT -A INPUT -p tcp --dport 443 -m state --state NEW -j ACCEPT
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# allow rsyslog and audit remote server
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#$IPT -A INPUT -p tcp --dport 514 -m state --state NEW -j ACCEPT
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#$IPT -A INPUT -p udp --dport 60 -m state --state NEW -j ACCEPT
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# allow incoming ICMP ping pong stuff
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$IPT -A INPUT -p icmp --icmp-type 8 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
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$IPT -A OUTPUT -p icmp --icmp-type 0 -m state --state ESTABLISHED,RELATED -j ACCEPT
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# prevent ssh brute force attack
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$IPT -A LOGDROP -j LOG
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$IPT -A LOGDROP -j LOG --log-prefix "FW-LOGDROP "
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$IPT -A LOGDROP -j DROP
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# Log everything else
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# *** Required for psad ****
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$IPT -A INPUT -j LOG
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$IPT -A FORWARD -j LOG
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$IPT -A INPUT -j LOG --log-prefix "FW-INPUT "
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$IPT -A FORWARD -j LOG --log-prefix "FW-FORWARD "
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$IPT -A INPUT -j DROP
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exit 0
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