[WBEL-users] iptables

Nayana Hettiarachchi Nayana Hettiarachchi <nayanah@gmail.com>
Thu, 16 Sep 2004 21:24:09 -0700


Hey guys,

i am just playing around with a box with 2 NICs and trying to setup a router

eth0 on 192.168.0.0/24 and eth1 on 192.168.5.0/24

i setup Ipforwarding and setup a chain in iptables to forward to both sides, 


[root@lw01 root]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  192.168.0.0/24       192.168.5.0/24
ACCEPT     all  --  192.168.5.0/24       192.168.0.0/24

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination


i am trying to ping from 192.168.0.2 to 192.168.5.201 and i am not
getting a ping reply,

when i do a tcpdump on the router box i can see the requests being forwarded

[root@lw01 root]# tcpdump
tcpdump: listening on eth0
20:21:02.407612 192.168.0.2 > 192.168.5.201: icmp: echo request
20:21:07.413741 192.168.0.2 > 192.168.5.201: icmp: echo request


and if i do a tcpdump on 5.201 i see the requests comming and a reply
is being sent, but i dont see that reply on the router any idea ?

Thanks in advance

Nayana