On Fri, Sep 11, 2020 at 3:29 PM Andrew Chen <achen@fuze.com> wrote:

Thanks Alex.

So it turns out my rtpengine stopped working after our latest kernel upgrade to:

Linux sjomainrtpe30 5.3.0-1035-aws #37-Ubuntu SMP Sun Sep 6 01:17:09 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

at the time, I was running an older version 8.0.x so I recompiled all the ngcp packages under this kernel and completed the installation without issues.

As soon as we started making test calls, I received 0 audio from those test endpoints. Looking at the rtpengine logs, I see several messages that's quite concerning:

Sep 11 18:43:41 sjomainrtpe30 kernel: [ 13.434623] xt_RTPENGINE: loading out-of-tree module taints kernel.
Sep 11 18:43:41 sjomainrtpe30 kernel: [ 13.434670] xt_RTPENGINE: module verification failed: signature and/or required key missing - tainting kernel
Sep 11 18:43:41 sjomainrtpe30 kernel: [ 13.434938] Registering xt_RTPENGINE module - version 9.0.1.0+0~mr9.0.1.0

and

Sep 11 18:49:50 sjomainrtpe30 rtpengine[1030]: WARNING: [2-7859@2600:1f1c:4ff:3e01:f64d:2f67:c0fa:c931 port 50000]: No support for kernel packet forwarding available (decryption cipher or HMAC not supported by kernel module)

which I assume is due to the first error I pasted.

So I tried

- rebooting the system which maybe the module wasn't loaded properly.
- I reran modprobe to make sure the module is installed
- I ran some dkms command to see if any error pop up due to the kernel version I'm running and I see no errors:

dkms status
falco, 0.20.0+d77080a, 5.3.0-1032-aws, x86_64: installed
falco, 0.20.0+d77080a, 5.3.0-1035-aws, x86_64: installed
ngcp-rtpengine, 9.0.1.0+0~mr9.0.1.0, 5.3.0-1032-aws, x86_64: installed
ngcp-rtpengine, 9.0.1.0+0~mr9.0.1.0, 5.3.0-1035-aws, x86_64: installed

So I'm running out of options.

Any advice?

On Fri, Sep 11, 2020 at 3:17 PM Alex Balashov <abalashov@evaristesys.com> wrote:
There is an RTPEngine mailing list, I believe, but RTPEngine questions
are often posed here given its close association with Kamailio. What's
going on?

On 9/11/20 2:57 PM, Andrew Chen wrote:
> Hey guys,
>
> Is this the right place to ask about rtpengine (ngcp) related issues
> with kernel packet forwarding?
>
> Thanks.
>
> --
> Andy Chen
> Sr. Telephony Lead Engineer
> achen@ <mailto:achen@thinkingphones.com>fuze.com <http://fuze.com>
>
>
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