Re: IPv6 bind wrong IP. #4199

I believe kamailio bound to the correct ip, regardless of whether the
listed output via the tool (netstat/ss) is long or short form of ipv6, it
should be considerably irrelevant
https://datatracker.ietf.org/doc/html/rfc4291#section-2.2
You should be focusing on the "not able to register" part, not the bind
part, could be very well the client issue.

rgds,
Loi Dang Thanh
Phone : +84. 774.735.448
Email : [email protected]


On Wed, Apr 16, 2025 at 4:13 PM Sergei Safarov via sr-users <
[email protected]> wrote:

> As I know netstat stip long IPv6 addresses during output.
> Try using
>
> ss -l -n
>
> On Wed, 2025-04-09 at 16:10 +0700, Vu Nguyen via sr-users wrote:
>
> *Dear Sir,*
>
> I have opened an issue on GitHub: *"IPv6 bind wrong IP. #4199
> <https://github.com/kamailio/kamailio/issues/4199>"*.
>
> *System Details:*
>
>    -
>
>    *Kamailio (5.8.x)* – SIP Proxy
>    -
>
>    *FreeSWITCH* – Media Server
>    -
>
>    *OS* – Debian 12
>    -
>
>    *Gateway* – aaaa:bbb:cccc:20::1
>    -
>
>    *IPv6 Address* – aaaa:bbb:cccc:20::41e
>
> ------------------------------
>
> *kamailio.cfg:*
>
> #!define ADDR_IPV4 xxx.xxx.xxx.xxx #!define ADDR_IPV6 [aaaa:bbb:cccc:20::41e] listen=ADDR_IPV4 listen=ADDR_IPV6
>
> ------------------------------
>
> *netstat Output:*
>
> tcp6 0 0 aaaa:bbb:cccc:20:::5060 :::* LISTEN 1691274/kamailio tcp6 0 0 aaaa:bbb:cccc:20:::5061 :::* LISTEN 1691274/kamailio udp6 0 0 aaaa:bbb:cccc:20:::5060 :::* 1691222/kamailio
>
> As shown, although I explicitly set the listen IP to aaaa:bbb:cccc:20::41e,
> Kamailio strips the last part of the address and binds to
> aaaa:bbb:cccc:20::
>
> I also upgraded to *version 6.0* with default cfg and set auto_bind_ipv6=1
> or changed ipv6 address, but the issue still persists.
> ------------------------------
>
> *IPv6 Interface Configuration:*
>
> auto eth1 iface eth1 inet6 static address aaaa:bbb:cccc:20::41e netmask 64 gateway aaaa:bbb:cccc:20::1
>
> I can successfully ping in and out using this IPv6 address.
> ------------------------------
>
> Do I need to configure anything else in Kamailio or the system to ensure
> it binds to the full IPv6 address aaaa:bbb:cccc:20::41e as expected?
>
> Currently I can register with ipv4, but ipv6 does not.
>
> Thank you for your assistance.
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