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Tunnel randomly stops working

Started by an0key, January 31, 2011, 08:17:09 AM

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an0key

Hi all,

So I have a tunnel setup on one of my Centos 5 Servers, working as a gateway for other servers on that network.

The tunnel comes up fine, however on occasion, will stop passing traffic. The only way to get it to work again, is to stop iptables, and the traffic flows, and then start iptables.

I'm not sure if HE tear town the tunnel at all if it's idle, and try to bring it back up when traffic is seen egress/ingress. If this is the case maybe I have something missing from my allow rules on the iptables config? I have Proto 41 allowed, and believe this all I require?


[root@lnd01 ~]# iptables --list
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
RH-Firewall-1-INPUT  all  --  anywhere             anywhere           

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
RH-Firewall-1-INPUT  all  --  anywhere             anywhere           

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain RH-Firewall-1-INPUT (2 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere           
ACCEPT     icmp --  anywhere             anywhere            icmp any
ACCEPT     ipv6 --  anywhere             anywhere           
ACCEPT     esp  --  anywhere             anywhere           
ACCEPT     ah   --  anywhere             anywhere           
ACCEPT     udp  --  anywhere             224.0.0.251         udp dpt:mdns
ACCEPT     udp  --  anywhere             anywhere            udp dpt:ipp
ACCEPT     udp  --  anywhere             anywhere            udp dpt:openvpn
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ipp
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED
ACCEPT     tcp  --  anywhere             anywhere            state NEW tcp dpt:ssh
ACCEPT     all  --  192.168.5.0/24       anywhere           
ACCEPT     all  --  10.8.0.0/24          anywhere           
ACCEPT     all  --  192.168.31.0/24      anywhere           
ACCEPT     all  --  192.168.32.0/24      anywhere           
ACCEPT     all  --  192.168.8.0/24       anywhere           
DROP       all  --  anywhere             anywhere           

Am I missing something?