login as: root
root@10.1.1.2's password:
Welcome to Ubuntu 13.04 (GNU/Linux 3.8.0-33-generic i686)
* Documentation: https://help.ubuntu.com/
System information as of Tue Nov 26 19:06:42 YEKT 2013
System load: 0.12 Processes: 120
Usage of /: 11.4% of 35.60GB Users logged in: 1
Memory usage: 47% IP address for eth1: 10.1.1.2
Swap usage: 0% IP address for ppp0: 109.135.155.145
Graph this data and manage this system at https://landscape.canonical.com/
71 packages can be updated.
0 updates are security updates.
New release '13.10' available.
Run 'do-release-upgrade' to upgrade to it.
Last login: Tue Nov 26 15:03:30 2013 from 10.1.1.123
root@server:~# sudo iptables-save
# Generated by iptables-save v1.4.12 on Tue Nov 26 19:07:08 2013
*nat
:PREROUTING ACCEPT [92882:6861926]
:INPUT ACCEPT [6088:373307]
:OUTPUT ACCEPT [2091:152169]
:POSTROUTING ACCEPT [2091:152169]
:NAT_POSTROUTING_CHAIN - [0:0]
:NAT_PREROUTING_CHAIN - [0:0]
:POST_NAT_POSTROUTING_CHAIN - [0:0]
:POST_NAT_PREROUTING_CHAIN - [0:0]
-A PREROUTING -j NAT_PREROUTING_CHAIN
-A PREROUTING -j POST_NAT_PREROUTING_CHAIN
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.0.0.200:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3899
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 13107 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16:3389
-A PREROUTING -d 109.135.155.145/32 -p tcp -m tcp --dport 3389 -j DNAT --to-destination 10.1.1.16
-A POSTROUTING -o ppp+ -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
-A POSTROUTING -j NAT_POSTROUTING_CHAIN
-A POSTROUTING -s 10.1.1.0/24 ! -d 10.1.1.0/24 -o ppp+ -j MASQUERADE
-A POSTROUTING -j POST_NAT_POSTROUTING_CHAIN
-A POSTROUTING -d 10.0.0.200/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
-A POSTROUTING -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
-A POSTROUTING -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
-A POSTROUTING -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
-A POSTROUTING -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
-A POSTROUTING -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j SNAT --to-source 109.135.155.145
COMMIT
# Completed on Tue Nov 26 19:07:08 2013
# Generated by iptables-save v1.4.12 on Tue Nov 26 19:07:08 2013
*mangle
:PREROUTING ACCEPT [2846943:1711056906]
:INPUT ACCEPT [310946:26577692]
:FORWARD ACCEPT [2505545:1682548042]
:OUTPUT ACCEPT [158879:21241552]
:POSTROUTING ACCEPT [2664579:1703829128]
COMMIT
# Completed on Tue Nov 26 19:07:08 2013
# Generated by iptables-save v1.4.12 on Tue Nov 26 19:07:08 2013
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT DROP [0:0]
:BASE_FORWARD_CHAIN - [0:0]
:BASE_INPUT_CHAIN - [0:0]
:BASE_OUTPUT_CHAIN - [0:0]
:DMZ_FORWARD_IN_CHAIN - [0:0]
:DMZ_FORWARD_OUT_CHAIN - [0:0]
:DMZ_INET_FORWARD_CHAIN - [0:0]
:DMZ_INPUT_CHAIN - [0:0]
:DMZ_LAN_FORWARD_CHAIN - [0:0]
:DMZ_OUTPUT_CHAIN - [0:0]
:EXT_BROADCAST_CHAIN - [0:0]
:EXT_FORWARD_IN_CHAIN - [0:0]
:EXT_FORWARD_OUT_CHAIN - [0:0]
:EXT_ICMP_FLOOD_CHAIN - [0:0]
:EXT_INPUT_CHAIN - [0:0]
:EXT_MULTICAST_CHAIN - [0:0]
:EXT_OUTPUT_CHAIN - [0:0]
:FORWARD_CHAIN - [0:0]
:HOST_BLOCK_DROP - [0:0]
:HOST_BLOCK_DST - [0:0]
:HOST_BLOCK_SRC - [0:0]
:INET_DMZ_FORWARD_CHAIN - [0:0]
:INPUT_CHAIN - [0:0]
:INT_FORWARD_IN_CHAIN - [0:0]
:INT_FORWARD_OUT_CHAIN - [0:0]
:INT_INPUT_CHAIN - [0:0]
:INT_OUTPUT_CHAIN - [0:0]
:LAN_INET_FORWARD_CHAIN - [0:0]
:OUTPUT_CHAIN - [0:0]
:POST_FORWARD_CHAIN - [0:0]
:POST_INPUT_CHAIN - [0:0]
:POST_INPUT_DROP_CHAIN - [0:0]
:POST_OUTPUT_CHAIN - [0:0]
:RESERVED_NET_CHK - [0:0]
:SPOOF_CHK - [0:0]
:VALID_CHK - [0:0]
-A INPUT -j BASE_INPUT_CHAIN
-A INPUT -j INPUT_CHAIN
-A INPUT -j HOST_BLOCK_SRC
-A INPUT -j SPOOF_CHK
-A INPUT -i ppp+ -j VALID_CHK
-A INPUT -i ppp+ ! -p icmp -m state --state NEW -j EXT_INPUT_CHAIN
-A INPUT -i ppp+ -p icmp -m state --state NEW -m limit --limit 60/sec --limit-burst 100 -j EXT_INPUT_CHAIN
-A INPUT -i ppp+ -p icmp -m state --state NEW -j EXT_ICMP_FLOOD_CHAIN
-A INPUT -i eth1 -j INT_INPUT_CHAIN
-A INPUT -j POST_INPUT_CHAIN
-A INPUT -m limit --limit 1/sec -j LOG --log-prefix "AIF:Dropped INPUT packet: " --log-level 6
-A INPUT -j DROP
-A FORWARD -d 10.1.1.16/32 -i eth0 -o eth1 -p tcp -m tcp --dport 3389 -j ACCEPT
-A FORWARD -j BASE_FORWARD_CHAIN
-A FORWARD -o ppp+ -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
-A FORWARD -j FORWARD_CHAIN
-A FORWARD -j HOST_BLOCK_SRC
-A FORWARD -j HOST_BLOCK_DST
-A FORWARD -i ppp+ -j EXT_FORWARD_IN_CHAIN
-A FORWARD -o ppp+ -j EXT_FORWARD_OUT_CHAIN
-A FORWARD -i eth1 -j INT_FORWARD_IN_CHAIN
-A FORWARD -o eth1 -j INT_FORWARD_OUT_CHAIN
-A FORWARD -j SPOOF_CHK
-A FORWARD -i eth1 -o eth1 -j ACCEPT
-A FORWARD -i eth1 -o ppp+ -j LAN_INET_FORWARD_CHAIN
-A FORWARD -j POST_FORWARD_CHAIN
-A FORWARD -m limit --limit 1/min --limit-burst 3 -j LOG --log-prefix "AIF:Dropped FORWARD packet: " --log-level 6
-A FORWARD -j DROP
-A FORWARD -d 10.1.1.16/32 -i eth0 -p tcp -m tcp --dport 3899 -j ACCEPT
-A FORWARD -d 10.1.1.16/32 -i eth0 -p tcp -m tcp --dport 3389 -j ACCEPT
-A FORWARD -i eth0 -p tcp -m tcp --dport 3389 -j ACCEPT
-A FORWARD -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j LOG
-A FORWARD -d 10.1.1.16/32 -p tcp -m tcp --dport 3389 -j ACCEPT
-A OUTPUT -j BASE_OUTPUT_CHAIN
-A OUTPUT -o ppp+ -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
-A OUTPUT -j OUTPUT_CHAIN
-A OUTPUT -j HOST_BLOCK_DST
-A OUTPUT -f -m limit --limit 3/min -j LOG --log-prefix "AIF:Fragment packet: " --log-level 6
-A OUTPUT -f -j DROP
-A OUTPUT -o ppp+ -j EXT_OUTPUT_CHAIN
-A OUTPUT -o eth1 -j INT_OUTPUT_CHAIN
-A OUTPUT -j POST_OUTPUT_CHAIN
-A OUTPUT -j ACCEPT
-A BASE_FORWARD_CHAIN -m state --state ESTABLISHED -j ACCEPT
-A BASE_FORWARD_CHAIN -p tcp -m state --state RELATED -m tcp --dport 1024:65535 -j ACCEPT
-A BASE_FORWARD_CHAIN -p udp -m state --state RELATED -m udp --dport 1024:65535 -j ACCEPT
-A BASE_FORWARD_CHAIN -p icmp -m state --state RELATED -j ACCEPT
-A BASE_FORWARD_CHAIN -i lo -j ACCEPT
-A BASE_INPUT_CHAIN -m state --state ESTABLISHED -j ACCEPT
-A BASE_INPUT_CHAIN -p tcp -m state --state RELATED -m tcp --dport 1024:65535 -j ACCEPT
-A BASE_INPUT_CHAIN -p udp -m state --state RELATED -m udp --dport 1024:65535 -j ACCEPT
-A BASE_INPUT_CHAIN -p icmp -m state --state RELATED -j ACCEPT
-A BASE_INPUT_CHAIN -i lo -j ACCEPT
-A BASE_OUTPUT_CHAIN -m state --state ESTABLISHED -j ACCEPT
-A BASE_OUTPUT_CHAIN -o lo -j ACCEPT
-A EXT_BROADCAST_CHAIN -p tcp -m tcp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV TCP broadcast: " --log-level 6
-A EXT_BROADCAST_CHAIN -p udp -m udp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV UDP broadcast: " --log-level 6
-A EXT_BROADCAST_CHAIN -p tcp -m tcp --dport 1024:65535 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV TCP broadcast: " --log-level 6
-A EXT_BROADCAST_CHAIN -p udp -m udp --dport 1024 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV UDP broadcast: " --log-level 6
-A EXT_BROADCAST_CHAIN -j DROP
-A EXT_FORWARD_IN_CHAIN -j VALID_CHK
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 3 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-unreachable flood: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 3 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 11 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-time-exceeded fld: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 11 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 12 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-param-problem fld: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 12 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-request(ping) fld: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 8 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 0 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-reply(pong) flood: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 0 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 4 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-source-quench fld: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m icmp --icmp-type 4 -j POST_INPUT_DROP_CHAIN
-A EXT_ICMP_FLOOD_CHAIN -p icmp -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP(other) flood: " --log-level 6
-A EXT_ICMP_FLOOD_CHAIN -p icmp -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 0 -m limit --limit 6/hour --limit-burst 1 -j LOG --log-prefix "AIF:Port 0 OS fingerprint: " --log-level 6
-A EXT_INPUT_CHAIN -p udp -m udp --dport 0 -m limit --limit 6/hour --limit-burst 1 -j LOG --log-prefix "AIF:Port 0 OS fingerprint: " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 0 -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p udp -m udp --dport 0 -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p tcp -m tcp --sport 0 -m limit --limit 6/hour -j LOG --log-prefix "AIF:TCP source port 0: " --log-level 6
-A EXT_INPUT_CHAIN -p udp -m udp --sport 0 -m limit --limit 6/hour -j LOG --log-prefix "AIF:UDP source port 0: " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -m tcp --sport 0 -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p udp -m udp --sport 0 -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p udp -m udp --sport 67 --dport 68 -j ACCEPT
-A EXT_INPUT_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 20/sec --limit-burst 100 -j ACCEPT
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 1024:65535 ! --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth scan? (UNPRIV): " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 0:1023 ! --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth scan? (PRIV): " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -d 255.255.255.255/32 -j EXT_BROADCAST_CHAIN
-A EXT_INPUT_CHAIN -d 224.0.0.0/4 -j EXT_MULTICAST_CHAIN
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV TCP packet: " --log-level 6
-A EXT_INPUT_CHAIN -p udp -m udp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV UDP packet: " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -m tcp --dport 1024:65535 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV TCP packet: " --log-level 6
-A EXT_INPUT_CHAIN -p udp -m udp --dport 1024:65535 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV UDP packet: " --log-level 6
-A EXT_INPUT_CHAIN -p igmp -m limit --limit 1/min -j LOG --log-prefix "AIF:IGMP packet: " --log-level 6
-A EXT_INPUT_CHAIN -j POST_INPUT_CHAIN
-A EXT_INPUT_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-request: " --log-level 6
-A EXT_INPUT_CHAIN -p icmp -m icmp ! --icmp-type 8 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-other: " --log-level 6
-A EXT_INPUT_CHAIN -p tcp -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p udp -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p igmp -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -p icmp -j POST_INPUT_DROP_CHAIN
-A EXT_INPUT_CHAIN -m limit --limit 1/min -j LOG --log-prefix "AIF:Other connect: " --log-level 6
-A EXT_INPUT_CHAIN -j POST_INPUT_DROP_CHAIN
-A EXT_MULTICAST_CHAIN -p tcp -m tcp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV TCP multicast: " --log-level 6
-A EXT_MULTICAST_CHAIN -p udp -m udp --dport 0:1023 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:PRIV UDP multicast: " --log-level 6
-A EXT_MULTICAST_CHAIN -p tcp -m tcp --dport 1024:65535 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV TCP multicast: " --log-level 6
-A EXT_MULTICAST_CHAIN -p udp -m udp --dport 1024 -m limit --limit 6/min --limit-burst 2 -j LOG --log-prefix "AIF:UNPRIV UDP multicast: " --log-level 6
-A EXT_MULTICAST_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-multicast-request: " --log-level 6
-A EXT_MULTICAST_CHAIN -p icmp -m icmp ! --icmp-type 8 -m limit --limit 12/hour --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-multicast-other: " --log-level 6
-A EXT_MULTICAST_CHAIN -j DROP
-A HOST_BLOCK_DROP -m limit --limit 1/min --limit-burst 1 -j LOG --log-prefix "AIF:Blocked host(s): " --log-level 6
-A HOST_BLOCK_DROP -j DROP
-A INT_INPUT_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 20/sec --limit-burst 100 -j ACCEPT
-A INT_INPUT_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-request: " --log-level 6
-A INT_INPUT_CHAIN -p icmp -m icmp --icmp-type 8 -j DROP
-A INT_INPUT_CHAIN -j ACCEPT
-A LAN_INET_FORWARD_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 20/sec --limit-burst 100 -j ACCEPT
-A LAN_INET_FORWARD_CHAIN -p icmp -m icmp --icmp-type 8 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:ICMP-request: " --log-level 6
-A LAN_INET_FORWARD_CHAIN -p icmp -m icmp --icmp-type 8 -j DROP
-A LAN_INET_FORWARD_CHAIN -j ACCEPT
-A POST_INPUT_DROP_CHAIN -j DROP
-A SPOOF_CHK -s 10.1.1.0/24 -i eth1 -j RETURN
-A SPOOF_CHK -s 10.1.1.0/24 -m limit --limit 3/min -j LOG --log-prefix "AIF:Spoofed packet: " --log-level 6
-A SPOOF_CHK -s 10.1.1.0/24 -j POST_INPUT_DROP_CHAIN
-A SPOOF_CHK -j RETURN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth XMAS scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,ACK,URG -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth XMAS-PSH scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth XMAS-ALL scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth FIN scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth SYN/RST scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth SYN/FIN scan?: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -m limit --limit 3/min -j LOG --log-prefix "AIF:Stealth Null scan: " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,ACK,URG -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-option 64 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:Bad TCP flag(64): " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-option 128 -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:Bad TCP flag(128): " --log-level 6
-A VALID_CHK -p tcp -m tcp --tcp-option 64 -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -p tcp -m tcp --tcp-option 128 -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -m state --state INVALID -j POST_INPUT_DROP_CHAIN
-A VALID_CHK -f -m limit --limit 3/min --limit-burst 1 -j LOG --log-prefix "AIF:Fragment packet: "
-A VALID_CHK -f -j DROP
COMMIT
# Completed on Tue Nov 26 19:07:08 2013
root@server:~#
