Mikrotik SIP trunk routing

Question

I have a Mikrotik RouterOS v6.36 with my network as follows (I am a newbie to networking in general and have been able to get stuff working half way. I just don't know what to look for.)

Router:
- Ether01: ISP Connection(Internet/WAN)
- Ether02: SIP Trunk(SIP Trunk - No internet)
- Ether03: Null
- Ether04: LAN

I have a PBX server on the LocalLan that needs to connect out via Ether01 to authenticate licenses etc. This works fine with no problem.

I now need to connect Ether02 which is a SIP trunk from our ISP to our PBX server.

I am able to get the Router to mark routes and send them out via Ether02 but I am not able to get that data to respond back through Ether02

Please could somebody give me guidance and let me know what data is required to help troubleshoot this.

This might be a routing problem in PBX, so just check if the PBX can send packets to the mikrotik ether2 IP. — Arash, Apr 26 '17 at 20:25
Hi Arash, I seem to have found the problem. There seemed to be a confusion on my incoming DSTNAT rules between the two Ether ports. — Johan Marais, Apr 28 '17 at 18:03
@chicks He deleting or keeping, I had a problem and with this question apparently the problem was fixed. — Hiago Souza, Sep 21 '22 at 18:34

score 2 · Accepted Answer · answered Apr 28 '17 at 18:06

2

I just had to specify my DSTNAT rules for each ethernet port, instead of having using generic incoming rule

answered Apr 28 '17 at 18:06

Johan Marais

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Mikrotik SIP trunk routing

1 Answers1