Hi Hernan,
Is the VNC service using any UDP packets? Do you show any rejects in the
log? You may want to try a DNAT rule in place of the ACCEPT. Are you
connecting from the outside box to just one of the inside boxes or will the
connection need to involve more than one inside machine ("one to one" or
"one to many")?

Best regards,
Patrick




-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Hernan
Castaneda
Sent: Tuesday, August 17, 2004 10:33 AM
To: Linux Seguridad
Subject: [Security Firewall] Problem witn VNC


Hi all,

I'm now configuring a VNC service and I'm having this
situation:

In order to get it work added these new rules

ACCEPT  lan     wan     tcp     5900:5910
ACCEPT  wan     lan     tcp     5900:5910
ACCEPT  wan     lan     tcp     5500

I've an XP box connected to a public unprotected IP
xx.xx.xx.xx, now I'm able to connect from my clients
behind the firewall to that box but not viceversa;
when I try to establich a connection from xx.xx.xx.xx
to one of my clients behind the firewall (I use the my
public protected ip on the viewer of the "remote"
host) the connection on port 5900 is inmediatly in
RESET state (I'm monitoring using iptraf).

Have I missed something maybe??

Best regards,

Hernan A. Castaqeda Z

=====
"Stay Free, find your own path, live with greatness
and pride.  Just stay beside the things that are
really eternal; otherwise keep flying..."

MORION ARBENET LUOSKRAD



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