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Subject: Configure cipe with iptables
From: Andreas Dahlén <andreas,AT,dahlen,DOT,ws>
Date: Wed, 16 Jan 2002 21:28:58 +0100

Hi!

I've problem to get cipe to work with iptables.

If I have no iptables rules and sets the default iptables policy to
ACCEPT for INPUT, OUTPUT and FORWARD everything works fine. I.e. I
can comunicate over the CIPE-link.

But I don't wants to have iptables configured in such a open way.
I've tried the following (besides the some basic rules), but with
this configuration I get "ping: sendto: Operation not permitted"
when I tries to ping the cipe-address of the other gate.

Gate A:
$IPTABLES -A INPUT -p UDP -i $EXT_IF -s gateB_IP -j ACCEPT
$IPTABLES -A OUTPUT -p UDP -o $EXT_IF -d gateB_IP -j ACCEPT
$IPTABLES -A INPUT -i cipecb0 -j ACCEPT
$IPTABLES -A OUTPUT -o cipecb0 -j ACCEPT
$IPTABLES -A FORWARD -i cipecb0 -j ACCEPT
options:
me 6060
peer gateB_IP
ptpaddr 10.255.255.3
ipaddr 10.255.255.1

Gate B:
$IPTABLES -A INPUT -p UDP -i $EXT_IF -s gateA_IP -j ACCEPT
$IPTABLES -A OUTPUT -p UDP -o $EXT_IF -d gateA_IP -j ACCEPT
$IPTABLES -A INPUT -i cipecb0 -j ACCEPT
$IPTABLES -A OUTPUT -o cipecb0 -j ACCEPT
$IPTABLES -A FORWARD -i cipecb0 -j ACCEPT
options:
me 6060
peer gateA_IP
ptpaddr 10.255.255.1
ipaddr 10.255.255.3

What do I miss with the configuration of iptables?

Software used:
cipe 1.5.2
iptables 1.2.4
kernel 2.4.9 (Redhat 7.2 original) and 2.4.5 (Custumed compiled)

/Andreas





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