[OpenSIPS-Users] 408 Request Timeout with UDP

Nabeel nabeelshikder at gmail.com
Thu Aug 6 07:13:05 CEST 2015

I tested the call by connecting both phones to mobile network instead of
having one connected to Wi-Fi.  Even in this case, I found that the same
'404 Request Timeout' occurs, with the same SIP trace:


This means the issue cannot be explained with callee having a private IP.
Strangely, there seems to be three public IPs relating to the callee in the
SIP trace above (?!)  (, and
The caller's public IP is

Regarding your suggestions:

How do I carry out that uac_nat_test while registering?

What flags should I be looking out for in the online list info?

On 6 August 2015 at 05:21, SamyGo <govoiper at gmail.com> wrote:

> It seems purely a NAT handling issue. While registering callee phone the
> NAT test should store routable/reachable contact and use it to send call.
> However, it is directly sending call to private IP and hence timeout
> occurs.
> Do print some log lines while doing uac_nat_test while registering. Also
> use opensipsctl command line tool to see details of online users..AFAIR its
> "opensipsctl ul show"
> See what flags are set for the callee.
> On Aug 6, 2015 12:14 AM, "Nabeel" <nabeelshikder at gmail.com> wrote:
>> Hi,
>> Yes, the destination IP is and both phones are
>> registered to OpenSIPS.  In this case, the callee is connected to Wi-Fi
>> (hence 192.xx IP address) and the caller is connected to a mobile network.
>> The opensips.cfg I am using was generated from 'make menuconfig', except
>> with the addition of "alias=domain.com". I have attached my config file
>> at this link:
>> http://pastebin.com/0QRyC938
>> On 6 August 2015 at 05:00, SamyGo <govoiper at gmail.com> wrote:
>>> Hi Nabeel,
>>> Quick question; what is this destination ip? ? - Destination
>>> User Agent Registered on OpenSIPS?
>>> Can you share the opensips.cfg code snippet for this call ?
>>> On Wed, Aug 5, 2015 at 11:55 PM, Nabeel <nabeelshikder at gmail.com> wrote:
>>>> Hi,
>>>> I am using the residential script generated by 'make menuconfig', with
>>>> UDP and NAT support enabled.  I added "alias=domain.com" to the config
>>>> because otherwise the UA did not register with my domain (
>>>> username at domain.com). When I attempt to make a call, I see '408
>>>> Request Timeout' in the sip trace and the call does not connect.  Please
>>>> check the log/trace below and advise how to fix this.
>>>> SIP trace:
>>>> http://pastebin.com/u5h9qGNr
>>>> OpenSIPS log:
>>>> http://pastebin.com/B8PUCKh0
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