Are you sure it didn't just turn on SIP ALG? On Mon, Mar 23, 2026 at 10:16 AM Nate Burke <[email protected]> wrote:
> I've run into a couple instances of UBNT routers randomly blocking SIP > Phone traffic. One of my customers with 2 locations changed to the UBNT > Dream Router 7 last year. Randomly, like every 2-3 months, it will just > decide to block SIP traffic from a single handset in the office. > Rebooting the router doesn't change anything and sometimes breaks an > additional phone. If I change the LAN Address of the handset, it will > start working again. I've ask their IT people, who claim to have > Whitelisted the SIP Server, and have disabled SIP ALG. Are there any > other settings that would be blocking specific handset SIP traffic? > > I've only ever run into this one time before with an Old ORBI router. > Exact same scenario. Could never find anything in the settings that was > blocking the traffic, but assigning a new LAN Address to the handset > fixed it. > > It is specific to SIP traffic, the phone can ping/HTTP out to the > internet without issue, it's not like it's blocking the all the phones > IP traffic. > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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