Need extra help installing your Ooma Hub or Telo system? Let us know.
#1023 by AlanR
Wed Dec 03, 2008 5:23 pm
I have a problem with a firewall set up in a cable modem/router - Motorola SBG900. I have set up the ports from the ooma knowledge-base article: UDP 1194, UDP 3480, UDP 514, UDP 49000-50000 and TCP 443. Several calls I made have been dropped after a few seconds. If I disable my firewall, this does not happen, but I'd rather not do that. Does ooma use any other ports that need to be set up?

The router has a browser interface used to set up. I can either set the firewall policy to high/med/low risk or I can customize it. The high/med/low policies use packet filtering to block disallowed inbound traffic. My current setting is customized - for that I define a list of ports manually. It allows me to specify a port range, protocol, allow outbound, allow inbound and protocol# (don't know what that is but it is set to 0). I added the ooma ports to this list in my customized settings.

Both the router and the ooma hub run DCHP - I don't know if that's ideal?

I tried e-mailing and calling support on the phone this morning but spent half an hour on hold and gave up.

I tried plugging the phone into the hub instead of the scout and have the same problem - when I turned on my firewall and made a call, the call went through but then cut off after a few seconds.

Anyone seen this or have any ideas?

Thanks,

Alan
#1039 by Dennis P
Thu Dec 04, 2008 12:25 pm
Is there a way to turn off Denial of Service attack prevention? I've seen firewalls interpret VoIP traffic as a DoS attack and stop forwarding the traffic after a few seconds.

You could also try setting up ooma on the firewall's DMZ.
#1069 by AlanR
Fri Dec 05, 2008 11:28 am
I don't have a way to turn off denial of servie attacks.

I tried setting ooma in the firewall's DMZ and this works - no dropped calls. However, since my network and computers are all downstream of ooma won't this put my whole network in the DMZ?

Thanks for your help!

Who is online

Users browsing this forum: No registered users and 9 guests