OpenVPN on Asus WL-500gP

[Tamadite]

Have you checked? http://wl500g.info/showthread.php?t=5312

pay special attention to the firewall rules.

[AlexSantos]

Despite being just a static router I missed a NAT rule in iptables.

Chain POSTROUTING (policy ACCEPT 15603 packets, 1038K bytes)
pkts bytes target prot opt in out source destination
8 672 MASQUERADE all -- * tun0 192.168.2.0/24 192.168.3.0/24

[AlexSantos]

My OpenVPN server (192.168.3.1) sees all machines behind my WL500 as 192.168.3.14 because of the NAT rule, which isn't what I intended to do the first place.
How can I make WL500 just route the traffic without masquerading?

Despite being just a static router I missed a NAT rule in iptables.

Chain POSTROUTING (policy ACCEPT 15603 packets, 1038K bytes)
pkts bytes target prot opt in out source destination
8 672 MASQUERADE all -- * tun0 192.168.2.0/24 192.168.3.0/24