kindly help, I am new to iptables and I wish to allow my workstations behind a firewall to get registred to h323 gatekeeper and sip proxy (the two servers are on public ip i.e. outside nat). And for h323 gatekeeper, the workstation need to connect with port 1720 and iptables does not allow this. And again the sip proxy too needs port 5060. can somebody please help. My firewall tables is as below. Aruna *mangle :PREROUTING ACCEPT [693725:269731615] :INPUT ACCEPT [17143:2024798] :FORWARD ACCEPT [668493:267392562] :OUTPUT ACCEPT [12304:1113266] :POSTROUTING ACCEPT [681449:268539732] COMMIT # Completed on Fri Jun 24 13:42:48 2005 # Generated by iptables-save v1.2.7a on Fri Jun 24 13:42:48 2005 *nat :PREROUTING ACCEPT [89368:5853018] :POSTROUTING ACCEPT [36:5295] :OUTPUT ACCEPT [767:52073] -A PREROUTING -i eth0 -p udp -m udp --dport 0 -j REDIRECT --to-ports 5060 -A PREROUTING -i eth1 -p udp -m udp --dport 0 -j REDIRECT --to-ports 5060 -A PREROUTING -p tcp -m tcp --dport 1719 -j DNAT --to-destination 62.193.164.82:1719 <http://62.193.164.82:1719> -A PREROUTING -p tcp -m tcp --dport 1720 -j DNAT --to-destination 62.193.164.82:1720 <http://62.193.164.82:1720> -A PREROUTING -p udp -m udp --dport 1720 -j DNAT --to-destination 62.193.164.82:1720 <http://62.193.164.82:1720> -A PREROUTING -p udp -m udp --dport 1719 -j DNAT --to-destination 62.193.164.82:1719 <http://62.193.164.82:1719> -A PREROUTING -p udp -m udp --dport 1720 -j DNAT --to-destination 62.193.164.82:1719 <http://62.193.164.82:1719> -A PREROUTING -p tcp -m tcp --dport 1720 -j DNAT --to-destination 62.193.164.82:1719 <http://62.193.164.82:1719> -A POSTROUTING -o eth1 -j MASQUERADE -A POSTROUTING -o eth0 -j MASQUERADE -A POSTROUTING -o eth0 -j MASQUERADE COMMIT # Completed on Fri Jun 24 13:42:48 2005 # Generated by iptables-save v1.2.7a on Fri Jun 24 13:42:48 2005 *filter :INPUT DROP [8020:1171278] :FORWARD ACCEPT [111159:6603935] :OUTPUT ACCEPT [12403:1157055] -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp --dport 6000:6009 -j DROP -A INPUT -p tcp -m tcp --dport 7100 -j DROP -A INPUT -p tcp -m tcp --dport 111 -j DROP -A INPUT -p udp -m udp --dport 111 -j DROP -A INPUT -s 127.0.0.1 <http://127.0.0.1> -i eth0 -j DROP -A INPUT -i lo -j ACCEPT -A INPUT -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 22 -j ACCEPT -A INPUT -i eth0 -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 80 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 22 -j ACCEPT -A INPUT -i eth0 -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 80 -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp --dport 6000:6009 -j DROP -A INPUT -p tcp -m tcp --dport 7100 -j DROP -A INPUT -p tcp -m tcp --dport 111 -j DROP -A INPUT -p udp -m udp --dport 111 -j DROP -A INPUT -s 127.0.0.1 <http://127.0.0.1> -i eth0 -j DROP -A INPUT -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp ! --tcp-option 2 -j REJECT --reject-with tcp-reset -A INPUT -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 22 -j ACCEPT -A INPUT -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp --dport 6000:6009 -j DROP -A INPUT -p tcp -m tcp --dport 7100 -j DROP -A INPUT -p tcp -m tcp --dport 111 -j DROP -A INPUT -p udp -m udp --dport 111 -j DROP -A INPUT -s 127.0.0.1 <http://127.0.0.1> -i eth0 -j DROP -A INPUT -i eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp ! --tcp-option 2 -j REJECT --reject-with tcp-reset -A INPUT -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -i eth0 -p udp -m udp --dport 22 -j ACCEPT -A INPUT -i eth1 -p udp -m udp --dport 21 -j ACCEPT -A INPUT -i eth1 -p tcp -m tcp --dport 21 -j ACCEPT -A INPUT -i eth1 -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -i eth1 -p udp -m udp --dport 80 -j ACCEPT -A INPUT -s 10.60.0.0/255.255.0.0 <http://10.60.0.0/255.255.0.0> -p tcp -m tcp --dport 139 --tcp-flags SYN,RST,ACK SYN -j ACCEPT -A INPUT -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i eth0 -p icmp -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT COMMIT
