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Vonage and dropped calls through SG135

BioTech

Hello everyone,

We have had this issue for quite some time and support was unable to give us answers after spending days troubleshooting and reviewing logs live. Hoping that someone from the community has seen this before and can help.

About 25 users behind this unit, heavy phone users - mostly sales staff, experiencing call quality degrades from "robotalk" and mid word "exhales" to calls just dropping entirely.

So far we have:

-Added a separate dedicated cable uplink = WAN 100/10mb

-Vonage support (not much networking help) can not give us their server IPs or their AWS balancer for "security reasons" and we have seen phones register to different WAN IPs. Therefor, we can not make use of the SIP Support feature on UTM.

-Separated LAN traffic via VLANs

-Applied FW rules of: VoIP Network > ANY > Internet IPv4

-IPS (Anti-DoS/Flood and Anti-Port Scan) Global Settings: VoIP Network removed

-Advanced Treat Protection: VoIP Network is exempt

-Swapping out our UTM with a plain router (of different brand) clears up the issue so it is not on ISP side either

 

Anyone has notes that they can share on what it takes to get these UTMs to play nice with Vonage?

Thanks for your time!



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  • 0

    Does doing #1 in Rulz give you any insights?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson

    Hi BAlfson,

    I have not checked on UDP Flood Protection but IPS was turned off globally. Honestly, after hours of troubleshooting we left it in hands of support so I am not 100% that is was disabled past that.

    Now, IF this turns out to be the case of UDP Flood (it will take us a while to get a permission to 'mess with the network' now that it is working with another router in place) how can we run IPS and VoIP simultaneously? I would hate to loose the protection from UDP/ICMP flood. 

     

    Thanks so much!

Reply
  • 0 in reply to BAlfson

    Hi BAlfson,

    I have not checked on UDP Flood Protection but IPS was turned off globally. Honestly, after hours of troubleshooting we left it in hands of support so I am not 100% that is was disabled past that.

    Now, IF this turns out to be the case of UDP Flood (it will take us a while to get a permission to 'mess with the network' now that it is working with another router in place) how can we run IPS and VoIP simultaneously? I would hate to loose the protection from UDP/ICMP flood. 

     

    Thanks so much!

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