[asterisk-users] two sip listening ports for single asterisk

[Matthew J. Roth]

Mike wrote:
> I tried using this iptables sample, and did not see duplicate packets
> on '--to-ports' port
>
> Has some verified this is working for them?
>
> I listened on both ports with tcpdump command.

Mike,

I can confirm that it's working.  Admittedly, I never looked at the 
packets with tcpdump because this *just worked* for me.  Calls that were 
sent to both ports (5060 and 5062) made it to Asterisk which was only 
listening on port 5060.  What's your experience with actual calls?

As the original poster, I understand if you want third-party 
verification.  I *thought* this was a slamdunk but I'm not an iptables 
guru so I'd like it, too.

What does the output of "iptables-save" and "lsmod" look like?  Here's 
mine, trimmed for relevancy:

[root at asterisk ~]# iptables-save
# Generated by iptables-save v1.3.5 on Thu Nov 20 12:03:21 2008
*nat
:PREROUTING ACCEPT [5579:1727747]
:POSTROUTING ACCEPT [1943:176116]
:OUTPUT ACCEPT [1943:176116]
-A PREROUTING -i eth2 -p udp -m udp --dport 5062 -j REDIRECT --to-ports 5060
COMMIT
# Completed on Thu Nov 20 12:03:21 2008

[root at asterisk ~]# lsmod
Module                      Size  Used by
ip_conntrack_netbios_ns    36033  0
ipt_REDIRECT               35009  1
xt_tcpudp                  36417  1
iptable_nat                40773  1
ip_nat                     53101  2 ipt_REDIRECT,iptable_nat
ip_conntrack               91237  3 
ip_conntrack_netbios_ns,iptable_nat,ip_nat
nfnetlink                  40457  2 ip_nat,ip_conntrack
ip_tables                  55329  1 iptable_nat
x_tables                   50377  4 
ipt_REDIRECT,xt_tcpudp,iptable_nat,ip_tables

Regards,

Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer