Forwarding not work in FC9 but ip forward is turn on

[ppps]

Hey guys,
first of all I would like to thank them for their great support, thanks to that I could now bring forward a package from both ends, or for any network, except for one detail :( The 192.168.5.0 network is supported by a router zyxell Prestige 660-Hw T1-V2 that gives me access to the Internet.

Through this router I can reach computers behind the router zyxell (example: from 192.168.5.20 to 192.168.1.210 via linux FC9), but unfortunately from 192.168.1.210 I can not ping the interface of the router ZyXEL (IP: 192,168 .5.1). 

But if I can ping from 192.168.5.254 (linux FC) to 192.168.5.20. This is quite strange to me :(. I mean

Pinging 192.168.1.210  192.168.5.1 does NOT WORK! :(
Pinging 192.168.5.254  192.168.5.1 if it works!
192.168.5.20 Pinging  192.168.5.1 also works

I called my ISP and I asked for some filter on the router itself that prevents the ping, but they say that with the default settings there is no filter that blocks access to the interface. 
I even reset the router ZyXEL to the default values but does not work.

My supplier tells me that there is something in linux known as an "echo" which I turn off in my linux FC but they have no idea how to do it. : (

I need to access my LAN to the Internet but I can only do that from the hosts directly connected to the router zyxell (including FC), but not from my other LANS :(

Please I need your support and thank you very much in advance!!


-- 
This is an email sent via the webforum on http://fcp.surfsite.org
http://fcp.surfsite.org/modules/newbb/viewtopic.php?post_id=291865&topic_id=61844&forum=10#forumpost291865
If you think, this is spam, please report this to webmaster at fcp.surfsite.org.