[Serusers] SIP VoIP Problem & Shorewall

[Andrei Verovski (aka MacGuru)]

Hi,


I am struggling to get SIP (session initiation protocol) VoIP software 
(SIP Express Router + XTen/KPhone/Linphone) and hardware (Grandstream 
SIP IP Phone) to work with Shorewall. The best result I have achieved 
is when I can call (or someone call me), hear sound, but my talk is not 
transmitted for weird reason.

I have quite standard configuration - two-card Linux PC with shorewall 
(one static external IP + static local IPs 192.168.0.xxx), opened ports 
are 5060 tcp/udp, 5004 udp (for Grandstream), and 8000-8020 udp (for 
XTen, Linphone).

SER itself is hosted by the independent provider, and other people who 
have another router/firewall software do not have similar problem.

It looks like something is wrong with NAT or masquarading. May be 
someone will be kind to e-mail (or post on this mailing list) their 
Shorewall configs (masq, nat, rules, etc.)? My e-mail is 
andreil1 at starlett.lv

Thanks in advance.


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