[strongSwan] Routing Polices with IPTABLES not working
andreas.steffen at strongswan.org
Fri Dec 7 10:14:53 CET 2012
have you enabled IP forwarding on your VPN gateway?
echo 1 > /proc/sys/net/ipv4/ip_forward
If yes, do you NAT packets from the private network behind the
gateway going towards the Internet?
If yes then you must exempt packets from the private network that
are intended to go through the IPsec tunnel from NAT with the
following iptables rule:
iptables -t nat -I POSTROUTING 1 -s <private network> -o eth0 \
-m policy --dir out --pol ipsec --proto esp -j ACCEPT
On 06.12.2012 19:37, Adrian Milanoski wrote:
> HI All,
> I have a strongSwan 5.0 setup and configure using IKEv2 PSK in config
> mode with the GW providing a pool of addresses. However after the
> strongSwan client connects I can only ping the Private interface of the
> VPN GW.
> I was wondering if anyone can assist me with what maybe going on and why
> packets are not routing out the private interface to the private
> networks default GW.
> Why is it so difficult to get these packets flowing from the tunnel to
> the private network? I thought the certain commands were to add rules in
> to the IPtables and remove them when the tunnel is torn down.
> Any help would be much appreciated.
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Andreas Steffen andreas.steffen at strongswan.org
strongSwan - the Linux VPN Solution! www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
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