[OpenSIPS-Users] rtpproxy (rtp.io) dual-stack parameters

Ihor Olkhovskyi igorolhovskiy at gmail.com
Thu Jan 1 12:17:22 UTC 2026


Hello!

Just a small clarification for running rtpproxy (via rtp.io) in dual-stack
IPv4/IPv6 flavour.

When I'm tryin to run rtp.io with a following params

loadmodule "rtp.io.so"
modparam("rtp.io", "rtpproxy_args", "-m 11000 -M 11512 -l 127.0.0.1 -6
OPENSIPS_IPV6_ADDR -F")

I'm getting
opensips: exactly 1 listen addresses required, 2 provided

>From manual I got the way to call it

modparam("rtp.io", "rtpproxy_args", "-m 11000 -M 11512 -l 127.0.0.1 -6
/OPENSIPS_IPV6_ADDR -F")

A bit confusing, as I'm not specifying "first" IPv6 address.
And what mode in this way rtpproxy is working? Means I want to build ipv4
(localhost) / ipv6 (external) bridge, so how it's considered? Like usual
bridge ("ie") mode? Or something else?

Thanks in advance!
-- 
Best regards,
Ihor (Igor)
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