228 lines
12 KiB
Bash
228 lines
12 KiB
Bash
#!/bin/bash
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# prevent SYNC-floods:
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echo 1 > /proc/sys/net/ipv4/tcp_syncookies
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# initialize:
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iptables -F
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iptables -X
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iptables -Z
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# config default policy's:
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iptables -P INPUT DROP
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iptables -P OUTPUT DROP
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iptables -P FORWARD DROP
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iptables -N LOGDROP
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iptables -A LOGDROP -j LOG
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iptables -A LOGDROP -j DROP
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# kernel tweaks:
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/bin/echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
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/bin/echo 0 > /proc/sys/net/ipv4/conf/all/accept_source_route
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/bin/echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
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/bin/echo 1 > /proc/sys/net/ipv4/conf/all/log_martians
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/bin/echo 0 > /proc/sys/net/ipv4/ip_forward
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# allow loopback:
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iptables -A INPUT -i lo -j ACCEPT
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iptables -A OUTPUT -o lo -j ACCEPT
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# allow asds.id.rug.nl
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iptables -A INPUT -i eth0 -s 129.125.2.50 -j ACCEPT
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iptables -A OUTPUT -o eth0 -d 129.125.2.50 -j ACCEPT
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# allow vlan933:
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iptables -A INPUT -i bond0.933 -j ACCEPT
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iptables -A OUTPUT -o bond0.933 -j ACCEPT
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# allow vlan934:
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iptables -A INPUT -i bond0.934 -j ACCEPT
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iptables -A OUTPUT -o bond0.934 -j ACCEPT
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#allow outbound to databases:
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iptables -A INPUT -p tcp -s 129.125.36.182 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.182 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.183 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.183 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.184 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.184 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.185 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.185 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.186 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.186 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.187 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.187 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.188 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.188 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.141 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.141 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.142 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.142 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.143 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.143 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.144 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.144 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.148 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.148 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.149 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.149 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.150 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.150 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.50.147 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.50.147 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.71 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.71 -j ACCEPT
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# allow munin-statieken-server:
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iptables -A INPUT -p tcp -s 129.125.50.91 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.50.91 -j ACCEPT
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# allow agenda:
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iptables -A INPUT -p tcp -s 129.125.2.116 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.2.116 -j ACCEPT
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# allow imap.google.com:
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iptables -A INPUT -p tcp -s 74.125.136/24 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 74.125.136/24 -j ACCEPT
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# allow imap.rug.nl:
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iptables -A INPUT -p tcp -s 129.125.2.81/32 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.2.81/32 -j ACCEPT
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# allow more google:
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iptables -A INPUT -p tcp -s 173.194.65.0/24 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 173.194.65.0/24 -j ACCEPT
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# new tcp packets sync packets:
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iptables -A INPUT -i eth0 -p tcp ! --syn -m state --state NEW -j DROP
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# refuse loopback pacts incoming eth0:
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iptables -A INPUT -i eth0 -d 127.0.0.0/8 -j DROP
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# allow dns outbound to/from DNS server:
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iptables -A INPUT -i eth0 -p udp --sport 53 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p udp --dport 53 -j ACCEPT
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# allow www outbound to 80:
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iptables -A INPUT -i eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
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# allow www outbound to 443:
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iptables -A INPUT -i eth0 -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
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# allow smtp outbound:
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iptables -A INPUT -i eth0 -p tcp --sport 25 -m state --state ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --dport 25 -m state --state NEW,ESTABLISHED -j ACCEPT
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# allow ssh from BWP:
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iptables -A INPUT -i eth0 -p tcp -s 129.125.249.0/24 -m state --state NEW,ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -d 129.125.249.0/24 -m state --state ESTABLISHED -j ACCEPT
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# log/drop the rest:
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iptables -A INPUT -i eth0 -s 129.125.0.0/16 -d 129.125.36.121/32 -j LOGDROP
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#zabbix monitorings
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iptables -A INPUT -i eth0 -s 129.125.50.238 -j ACCEPT
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iptables -A OUTPUT -o eth0 -d 129.125.50.238 -j ACCEPT
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# allow 9080 inbound:
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iptables -A INPUT -i eth0 -p tcp --dport 9080 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --sport 9080 -j ACCEPT
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# allow 2222 inbound:
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iptables -A INPUT -i eth0 -p tcp -s 129.125.249.0/24 --dport 2222 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -d 129.125.249.0/24 --sport 2222 -j ACCEPT
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# inbound gadgets:
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iptables -A INPUT -i eth0 -p tcp -m state --state ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -m state --state NEW,ESTABLISHED -j ACCEPT
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# allow from operator:
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iptables -A INPUT -i eth0 -s 129.125.50.41/32 -j ACCEPT
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iptables -A OUTPUT -o eth0 -d 129.125.50.41/32 -j ACCEPT
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# allow from/to ldap:
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iptables -A INPUT -i eth0 -s 129.125.68.50/32 -j ACCEPT
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iptables -A OUTPUT -o eth0 -d 129.125.68.50/32 -j ACCEPT
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# ldaps outbound:
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iptables -A INPUT -i eth0 -p tcp --sport 636 -m state --state ESTABLISHED -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --dport 636 -m state --state NEW,ESTABLISHED -j ACCEPT
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# allow nfs:
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iptables -A INPUT -i eth0 -s 129.125.50.171/32 -j ACCEPT
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iptables -A OUTPUT -o eth0 -d 129.125.50.171/32 -j ACCEPT
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# allow ntp
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iptables -A INPUT -i eth0 -p tcp --sport 123 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp --dport 123 -j ACCEPT
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iptables -A INPUT -i eth0 -p udp --sport 123 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p udp --dport 123 -j ACCEPT
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# allow charanga:
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iptables -A INPUT -i eth0 -p tcp -s 129.125.60.94/32 --dport 22 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -d 129.125.60.94/32 --sport 22 -j ACCEPT
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# charanga 129.125.60.94 port 2222:
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iptables -A INPUT -i eth0 -p tcp -s 129.125.60.94/32 --dport 2222 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -d 129.125.60.94/32 --sport 2222 -j ACCEPT
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# allow imaps:
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iptables -A INPUT -p tcp --sport 993 -j ACCEPT
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iptables -A OUTPUT -p tcp --dport 993 -j ACCEPT
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# Flush & default
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ip6tables -F INPUT
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ip6tables -F OUTPUT
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ip6tables -F FORWARD
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# setup log-chain:
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ip6tables -N LOGREJECT
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ip6tables -A LOGREJECT -j LOG
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ip6tables -A LOGREJECT -j REJECT
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# Set the default policy to drop
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ip6tables -P INPUT DROP
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ip6tables -P OUTPUT DROP
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ip6tables -P FORWARD DROP
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# rules:
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ip6tables -A INPUT -i lo -j ACCEPT
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ip6tables -A INPUT -j REJECT
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ip6tables -A OUTPUT -j REJECT
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# allow ganglia-statieken-server:
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iptables -A INPUT -p tcp -s 129.125.60.89 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.60.89 -j ACCEPT
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iptables -A INPUT -p tcp -s 129.125.36.191 -j ACCEPT
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iptables -A OUTPUT -p tcp -d 129.125.36.191 -j ACCEPT
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# open up port 9100 prometues:
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iptables -A INPUT -i eth0 -p tcp -s 129.125.2.233/32 --dport 9100 -j ACCEPT
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iptables -A OUTPUT -o eth0 -p tcp -d 129.125.2.233/32 --sport 9100 -j ACCEPT
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# allow icmp:
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iptables -A INPUT -p icmp -j ACCEPT
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iptables -A OUTPUT -p icmp -j ACCEPT
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