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VOIP Issue

I am running Sophos UTM 9.315 as a Home User.  I am having issues with with VOIP.  When I make a call, the person on the other end can hear me for about 30-60 seconds and then they cannot hear me well after that.  I can hear them perfectly but they cannot hear me.  I don't know if this makes a difference, but I am using a corporate VPN to my job, then using the the VOIP solution from my company...

Here is what I tried..(All solutions I tried, connected to corporate VPN then tried VOIP

1.  I tried going through Sophos UTM 9.315  this does not work.

2.  I tried connecting directly to a Hotspot not using Sophos and it works fine.

3.  I tried bypassing the Sophos UTM and it works fine.

Are there some configurations that I need to make?

Thanks
Brian

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0 BAlfson over 9 years ago

Brian, the first thing to suspect in these situations with VoIP is Anti-UDP Flooding activity. Check the Intrusion Prevention log. Any luck there?

Cheers - Bob
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0 tarheelnc1 over 9 years ago

There is nothing in the Intrusion Prevention log or the Firewall logs.....
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0 BAlfson over 9 years ago

How are you using the VPN - a site-to-site or remote access from a laptop? What is the endpoint for the VPN at the company?

Cheers - Bob
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0 tarheelnc1 over 9 years ago

Our VPN is remote access from my laptop. We use Cisco AnyConnect Secure Mobile Client to connect. The endpoint is to our intranet. (I hope that was what you were looking for).

Thanks
Brian
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0 BAlfson over 9 years ago

If you see nothing in the logs mention in #1 in Rulz, and #7 in Rulz gives you no hints, you're stuck doing packet captures when the problem occurs.

Cheers - Bob
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0 eganders_01 over 9 years ago

Brian:

You may have already answered these questions, but

1. Is your phone the only device generating traffic on your end when you're making calls?
2. You don't mention trying the VoIP or QoS settings on the Sophos firewall?
3. Tell us about your internet connection type and speeds?
4. Is the VoIP that you ultimately connect to PBX located at your office? Elsewhere?
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0 tarheelnc1 over 9 years ago

1. Usually when I am working this is the only device generating traffic
2. I did not try changing any settings for VoIP or Qos on the Sophos, but would welcome any settings I should try
3. My internet is cable and I am getting speeds of 93Mbps down and 12Mpbs up
4. The VoIP I connect to is located at my office..

Thanks
Brian
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0 tarheelnc1 over 9 years ago

How can I run a packet capture?

Thanks
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0 BAlfson over 9 years ago

I think you may need to ask that question of the Cisco community, Brian. Are you sure that there's nothing in the Intrusion Prevention log?

Cheers - Bob
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0 tarheelnc1 over 9 years ago

There is nothing in the IPS log. There is nothing in the Network Firewall logs either...

Brian
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