[Fwbuilder-discussion] Hairpinning issue?

[Victor L. <vla...@si...>]

I've tried Firewall Builder 4.1.1 on a Debian 5.6 machine in order to test a
network configuration like as the picture.

"FW" 
	Is the Firewall-Builder machine that connects "Net-1" to the
Internet.
     	It has a route to "Net-2" through "R" via the internal interface on
"Net-1".

"R" is a router that connects "Net-1" with another private network "Net-2"

"PC1" is a PC with a default route through FW.

"PC2" is a PC with a default route through R.

When PC1 wants to connect with PC2 it doesn't work fine. 
For example, I can do ping PC2 from PC1 but not connect via HTTP or other
protocols (Is not a firewall rule issue)
However I can do "telnet PC2 80".

I think is a hairpinning related issue with FirewallBuilder-Linux because
I've tried switch the FirewallBuilder with a Fortigate system and it worked
fine.

¿Does it exist some way to change this behavior?

Thanks a lot