diff options
Diffstat (limited to 'linux/conf/iptables/ipt-firewall.sh')
| -rw-r--r-- | linux/conf/iptables/ipt-firewall.sh | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/linux/conf/iptables/ipt-firewall.sh b/linux/conf/iptables/ipt-firewall.sh new file mode 100644 index 0000000..0391e33 --- /dev/null +++ b/linux/conf/iptables/ipt-firewall.sh @@ -0,0 +1,313 @@ +#!/bin/bash + +. /etc/iptables/ipt-conf.sh + +ipt_clear () { + echo "clear all iptables tables" + + $IPT -F + $IPT -X + $IPT6 -F + $IPT6 -X + #$PIT4 -Z + #$PIT6 -Z + $IPT -t nat -F + $IPT -t nat -X + $IPT -t mangle -F + $IPT -t mangle -X + $IPT -t raw -F + $IPT -t raw -X + $IPT -t security -F + $IPT -t security -X + $IPT -N blocker + $IPT -N blockip_in + $IPT -N blockip_out + + $IPT -N srv_dhcp + $IPT -N srv_rip + $IPT -N srv_icmp + $IPT -N srv_ntp + $IPT -N srv_dns_in + $IPT -N srv_dns_out + $IPT -N srv_http_in + $IPT -N srv_http_out + $IPT -N srv_https_in + $IPT -N srv_https_out + $IPT -N srv_smtp_in + $IPT -N srv_smtp_out + $IPT -N srv_ssh_in + $IPT -N srv_ssh_out + $IPT -N srv_git_in + $IPT -N srv_git_out + $IPT -N srv_db_in + $IPT -N srv_db_out + + + $IPT -N cli_dns_in + $IPT -N cli_dns_out + $IPT -N cli_http_in + $IPT -N cli_http_out + $IPT -N cli_https_in + $IPT -N cli_https_out + $IPT -N cli_ssh_in + $IPT -N cli_ssh_out + $IPT -N cli_pops_in + $IPT -N cli_pops_out + $IPT -N cli_smtps_in + $IPT -N cli_smtps_out + $IPT -N cli_irc_in + $IPT -N cli_irc_out + $IPT -N cli_ftp_in + $IPT -N cli_ftp_out + $IPT -N cli_git_in + $IPT -N cli_git_out + $IPT -N cli_gpg_in + $IPT -N cli_gpg_out + + # Set Default Rules + $IPT -P INPUT DROP + $IPT -P FORWARD DROP + $IPT -P OUTPUT DROP + + # Set Default Rules + $IPT6 -P INPUT DROP + $IPT6 -P FORWARD DROP + $IPT6 -P OUTPUT DROP + +} + +ipt_log () { + ## log everything else and drop + $IPT -A OUTPUT -j LOG --log-level 7 --log-prefix "iptables: OUTPUT: " + $IPT -A INPUT -j LOG --log-level 7 --log-prefix "iptables: INPUT: " + $IPT -A FORWARD -j LOG --log-level 7 --log-prefix "iptables: FORWARD: " + + $IPT6 -A OUTPUT -j LOG --log-level 7 --log-prefix "iptables: OUTPUT: " + $IPT6 -A INPUT -j LOG --log-level 7 --log-prefix "iptables: INPUT: " + $IPT6 -A FORWARD -j LOG --log-level 7 --log-prefix "iptables: FORWARD: " +} + +ipt_tables () { + echo "start adding tables..." + # Filter out comments and blank lines + # store each ip or subnet in $ip + if [ -f ip_blocker ] + then + ./ip_blocker ${SPAMLIST} + else + grep -v '^#' < ${SPAMLIST} | { while read ip + do + # Append everything to droplist + #echo "adding ${ip} to blockip" + $IPT -A blockip_in -s $ip -j LOG --log-prefix "${SPAMDROPMSG}" + $IPT -A blockip_in -s $ip -j DROP + $IPT -A blockip_out -d $ip -j LOG --log-prefix "${SPAMDROPMSG}" + $IPT -A blockip_out -d $ip -j DROP + done; } + echo "blockip_in and blockip_out added" + fi + + ####### blocker Chain ###### + ## Block google dns + #$IPT -A blocker -s 8.8.0.0/24 -j LOG --log-level 7 --log-prefix "iptables: blocker google: " + #$IPT -A blocker -s 8.8.0.0/24 -j DROP + ## Block sync + $IPT -A blocker -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 7 --log-prefix "iptables: drop sync: " + $IPT -A blocker -p tcp ! --syn -m state --state NEW -j DROP + ## Block Fragments + $IPT -A blocker -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop frag: " + $IPT -A blocker -f -j DROP + $IPT -A blocker -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP + $IPT -A blocker -p tcp --tcp-flags ALL ALL -j DROP + $IPT -A blocker -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop null: " + $IPT -A blocker -p tcp --tcp-flags ALL NONE -j DROP # NULL packets + $IPT -A blocker -p tcp --tcp-flags SYN,RST SYN,RST -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop syn rst syn rst: " + $IPT -A blocker -p tcp --tcp-flags SYN,RST SYN,RST -j DROP + $IPT -A blocker -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop xmas: " + $IPT -A blocker -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP #XMAS + $IPT -A blocker -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop fin scan: " + $IPT -A blocker -p tcp --tcp-flags FIN,ACK FIN -j DROP # FIN packet scans + $IPT -A blocker -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP + #$IPT -A blocker -p tcp --tcp-flags ACK,FIN FIN -j DROP + #$IPT -A blocker -p tcp --tcp-flags ACK,PSH PSH -j DROP + #$IPT -A blocker -p tcp --tcp-flags ACK,URG URG -j DROP + #$IPT -A blocker -p tcp --tcp-flags FIN,RST FIN,RST -j DROP + #$IPT -A blocker -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP + #$IPT -A blocker -p tcp --tcp-flags SYN,RST SYN,RST -j DROP + #$IPT -A blocker -p tcp --tcp-flags ALL ALL -j DROP + #$IPT -A blocker -p tcp --tcp-flags ALL NONE -j DROP + #$IPT -A blocker -p tcp --tcp-flags ALL FIN,PSH,URG -j DROP + #$IPT -A blocker -p tcp --tcp-flags ALL SYN,FIN,PSH,URG -j DROP + #$IPT -A blocker -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP + + ## Return to caller + $IPT -A blocker -j RETURN + + ######## DNS Server + #echo "server_in chain: Allow input to DNS Server" + $IPT -A srv_dns_in -p udp --dport 53 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_dns_in -p tcp --dport 53 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_dns_in -j RETURN + #echo "srv_dns_out chain: Allow output from DNS server" + $IPT -A srv_dns_out -p udp --sport 53 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_dns_out -p tcp --sport 53 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_dns_out -j RETURN + + ####### Database Server + $IPT -A srv_db_in -p tcp --dport 5432 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_db_in -j RETURN + $IPT -A srv_db_out -p tcp --sport 5432 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A srv_db_out -j RETURN + + ####### SSH Server + + $IPT -A srv_ssh_in -p tcp --dport 2222 -s ${BR_NET} -m state --state NEW -j ACCEPT + $IPT -A srv_ssh_in -p tcp --dport 2222 -m state --state NEW -j LOG --log-prefix "iptables: SSH NEW": + $IPT -A srv_ssh_in -p tcp --dport 2222 -m state --state NEW -m recent --set --name SSH -j ACCEPT + + $IPT -A srv_ssh_in -p tcp --dport 2222 -m recent \ + --update --seconds 60 --hitcount 4 --rttl \ + --name SSH -j LOG --log-prefix "${SPAMDROPMSG} SSH" + + $IPT -A srv_ssh_in -p tcp --dport 2222 -m recent --update --seconds 60 \ + --hitcount 4 --rttl --name SSH -j DROP + + $IPT -A srv_ssh_in -p tcp --dport 2222 --sport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + + #$IPT -A srv_ssh_in -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH -j ACCEPT + + #$IPT -A srv_ssh_in -p tcp --dport 22 -m recent \ + # --update --seconds 60 --hitcount 4 --rttl \ + # --name SSH -j LOG --log-prefix "${SPAMDROPMSG} SSH" + + #$IPT -A srv_ssh_in -p tcp --dport 22 -m recent --update --seconds 60 \ + # --hitcount 4 --rttl --name SSH -j DROP + + #$IPT -A srv_ssh_in -p tcp --dport 22 --sport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A srv_ssh_in -j RETURN + + $IPT -A srv_ssh_out -p tcp --sport 2222 --dport 1024:65535 -d ${BR_NET} -m state --state ESTABLISHED -j ACCEPT + $IPT -A srv_ssh_out -p tcp --tcp-flags SYN,ACK SYN,ACK --sport 2222 -j LOG --log-prefix "iptables: SSH OUT": + $IPT -A srv_ssh_out -p tcp --sport 2222 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + #$IPT -A srv_ssh_out -p tcp --sport 22 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A srv_ssh_out -j RETURN + + ####### smtp Server + $IPT -A srv_smtp_in -p tcp --dport 25 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_smtp_in -j RETURN + $IPT -A srv_smtp_out -p tcp --sport 25 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_smtp_out -j RETURN + + ####### HTTP Server + $IPT -A srv_http_in -p tcp --dport 80 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_http_in -j RETURN + $IPT -A srv_http_out -p tcp --sport 80 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_http_out -j RETURN + + ####### HTTPS Server + $IPT -A srv_https_in -p tcp --dport 443 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_https_in -j RETURN + $IPT -A srv_https_out -p tcp --sport 443 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_https_out -j RETURN + + ###### GIT server + $IPT -A srv_git_in -p tcp --dport 9418 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A srv_git_in -j RETURN + $IPT -A srv_git_out -p tcp --sport 9418 --dport 1024:65535 -m state --state RELATED,ESTABLISHED -j ACCEPT + $IPT -A srv_git_out -j RETURN + + ######## DNS Client + $IPT -A cli_dns_out -p udp --dport 53 --sport 1024:65535 -j ACCEPT + $IPT -A cli_dns_out -j RETURN + $IPT -A cli_dns_in -p udp --sport 53 --dport 1024:65535 -j ACCEPT + $IPT -A cli_dns_in -j RETURN + + ######## HTTP Client + #$IPT -A cli_http_in -p tcp -m tcp --tcp-flags ACK --sport 80 --dport 1024:65535 -j DROP + $IPT -A cli_http_in -p tcp --sport 80 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_http_in -p udp --sport 80 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_http_in -j RETURN + $IPT -A cli_http_out -p tcp --dport 80 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_http_out -p udp --dport 80 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_http_out -j RETURN + + ######## IRC client + $IPT -A cli_irc_in -p tcp --sport 6667 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_irc_in -j RETURN + $IPT -A cli_irc_out -p tcp --dport 6667 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_irc_out -j RETURN + + ######## FTP client + $IPT -A cli_ftp_in -p tcp --sport 21 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_ftp_in -p tcp --sport 20 --dport 1024:65535 -m state --state ESTABLISHED,RELATED -j ACCEPT + $IPT -A cli_ftp_in -p tcp --sport 1024:65535 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_ftp_in -j RETURN + $IPT -A cli_ftp_out -p tcp --dport 21 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_ftp_out -p tcp --dport 20 --sport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_ftp_out -p tcp --sport 1024:65535 --dport 1024:65535 -m state --state ESTABLISHED,RELATED -j ACCEPT + $IPT -A cli_ftp_out -j RETURN + + ######## GIT client + $IPT -A cli_git_in -p tcp --sport 873 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_git_in -p tcp --sport 9418 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_git_in -j RETURN + $IPT -A cli_git_out -p tcp --dport 873 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_git_out -p tcp --dport 9418 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_git_out -j RETURN + + ######## POP3S client + $IPT -A cli_pops_in -p tcp --sport 995 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_pops_in -j RETURN + $IPT -A cli_pops_out -p tcp --dport 995 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_pops_out -j RETURN + + ######## SMTPS client + $IPT -A cli_smtps_in -p tcp --sport 465 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_smtps_in -j RETURN + $IPT -A cli_smtps_out -p tcp --dport 465 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_smtps_out -j RETURN + + ######## HTTPS client + $IPT -A cli_https_in -p tcp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_https_in -p udp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_https_in -j RETURN + $IPT -A cli_https_out -p tcp --dport 443 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_https_out -p udp --dport 443 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_https_out -j RETURN + + ######## SSH client + $IPT -A cli_ssh_in -p tcp --sport 2222 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_ssh_in -p tcp --sport 22 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_ssh_in -j RETURN + + $IPT -A cli_ssh_out -p tcp -d ${BR_NET} --dport 2222 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_ssh_out -p tcp --tcp-flags SYN,ACK SYN,ACK --dport 2222 -j LOG --log-prefix "iptables: SSH OUT": + $IPT -A cli_ssh_out -p tcp --dport 2222 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_ssh_out -p tcp --dport 22 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_ssh_out -j RETURN + + ######## GPG key client + $IPT -A cli_gpg_in -p tcp --sport 11371 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT + $IPT -A cli_gpg_in -j RETURN + $IPT -A cli_gpg_out -p tcp --dport 11371 --sport 1024:65535 -m state --state NEW,ESTABLISHED -j ACCEPT + $IPT -A cli_gpg_out -j RETURN + + ######## DHCP Server + $IPT -A srv_dhcp -p udp --sport 68 --dport 67 -j ACCEPT + $IPT -A srv_dhcp -p udp --sport 67 --dport 68 -j ACCEPT + $IPT -A srv_dhcp -p udp --sport 67 --dport 67 -j ACCEPT + $IPT -A srv_dhcp -j RETURN + + ####### RIP Server + $IPT -A srv_rip -p udp --sport 520 --dport 520 -j ACCEPT + $IPT -A srv_rip -j RETURN + + ####### ICMP Server + $IPT -A srv_icmp -p icmp -j ACCEPT + $IPT -A srv_icmp -j RETURN + + ####### NTP Client and Server + $IPT -A srv_ntp -p udp --sport 123 --dport 123 -j ACCEPT + $IPT -A srv_ntp -j RETURN + +} |