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RB751G-2HnD AP seems to block UDP traffic used by 3CX

Posted: Wed Dec 03, 2014 1:06 pm
by skalada
RB751G-2HnD AP seems to block UDP traffic used by 3CX

Hello, good morning,

I´m having problems with the wireless SOHO Gigabit AP RB751G-2HnD http://routerboard.com/RB751G-2HnD used as an access point for wireless 3CX SoftPhones communications to the LAN.

The configuration of the AP is simply bridged to the LAN but aniway it seems to block UDP traffic used for RTP/RTCP or SIP protocols used by 3CX.

Following all 3CX indications we replaced it by another brand AP and it worked. Is there issue about it or any fix to use Mikrotik AP again?

Here I attach the configuration;

configuration Image

Kind Regards.

Re: RB751G-2HnD AP seems to block UDP traffic used by 3CX

Posted: Thu Dec 04, 2014 12:41 pm
by johnsilver
afaik you need to disable sip helper in ip > firewall

Re: RB751G-2HnD AP seems to block UDP traffic used by 3CX

Posted: Thu Dec 04, 2014 12:56 pm
by skalada
afaik you need to disable sip helper in ip > firewall
Hello johnsilver. Yes thanks for the answer, but following 3CX instructions we already disabled it and it still blocks the traffic. Regards

Re: RB751G-2HnD AP seems to block UDP traffic used by 3CX

Posted: Wed Jun 03, 2015 8:00 pm
by chipware
afaik you need to disable sip helper in ip > firewall
Hello johnsilver. Yes thanks for the answer, but following 3CX instructions we already disabled it and it still blocks the traffic. Regards
Hello,
I have the same problem. I can only connect using tunnel of 3cx (5090) Did you manage it?

bye
roland