Hi,
I've got two networks, 192.168.1.0 and 192.168.4.0, that are connected
thru an ADSL and a couple of firewalls (with iptables). Now I've got
some problems with the Vypress Messenger, a chat program that
communicates using the 7777 port. The problem is that outgoing traffic
from 192.168.4.0 is permitted, while incoming not, thus 192.168.4.0 can
send messages to the other network, but the 192.168.1.0 cannot. The
following is an excerpt of the iptables configuration for the network
192.168.1.0 on the 192.168.4.0 firewall:
[root@firewall script]# iptables-save | grep 192.168.1
-A INPUT -s 192.168.4.0/255.255.255.0 -d 192.168.1.0/255.255.255.0 -p
tcp -j ACCEPT
-A INPUT -s 192.168.4.0/255.255.255.0 -d 192.168.1.0/255.255.255.0 -p
udp -j ACCEPT
-A FORWARD -s 192.168.4.0/255.255.255.0 -d 192.168.1.0/255.255.255.0 -p
tcp -j ACCEPT
-A FORWARD -s 192.168.4.0/255.255.255.0 -d 192.168.1.0/255.255.255.0 -p
udp -j ACCEPT
-A OUTPUT -d 192.168.1.0/255.255.255.0 -o eth1 -p udp -j ACCEPT
I cannot see what's wrong here, since all the traffic among 192.168.1.0
and 192.168.4.0 is permitted. I'm pretty sure the problem is in the
iptables of 192.168.4.0 network cause if I cannot directly (i.e.,
bypassing the iptable firewall) vypress works.
Any suggestion?
Thanks,
Luca
--
Luca Ferrari
fluca1978@xxxxxxxxxxx
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