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Problem with IP Telephony via RED in Standard/Split mode

Rimas Baikauskas

Hi all, 

 

we have a problem in a remote office with RED15 and VoIP. The idea is to manage some IP ranges by UTM  and all other traffic including VoIP is let straight to the Internet.

RED is configured in Standart/Split mode, "Split Networks" ranges are defined: 192.168.0.0/16, 213.197.184.11/32, 10.0.0.64/28

Is it possible that RED is blocking VoIP packets some way? In remote sight Internet cable is connected straight to RED device and VoIP phone is behind RED (no routers or etc.). This way IP  phone is not working. If we connect phone device straight to Internet line - phone works fine.

ISP is giving an instructions what ports should be open:

Outbound Proxy (registration) xx.xxx.138.68

SIP IP range     xx.xxx.138.64/29

RTP IP range    xx.xxx.138.0/28

Port 5060 TCP/UDP

SIP ALG function should be off.

But, as far as i concerned, this in nothing to do with our UTM settings, because all this traffic should go straight to the Internet..

Maybe some one already had similar problem, please HELP :)

Thanks.

BR, 

Rimas

 



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  • 0

    Hi Rimas,

    Show me pictures of the RED configuration on the UTM. The only traffic that will reach UTM are those defined to access the local network rest of the traffic towards WAN will be routed directly to the internet by RED without blocking any port.

    Thanks

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
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  • 0 in reply to sachingurung

    Hi,

     

    thanks for your reply.

    RED settings:

    Split Networks descriptions:

    The odd fact is, that if  we plug Internet cable from RED WAN port straight to VoIP device, IP phone works perfectly. If we plug Internet cable to RED WAN and connect VoIP device, lets say, to RED LAN1 port the phone rings, but there is no sound when try to answer.. :(

     

    BR,

    Rimas

Reply
  • 0 in reply to sachingurung

    Hi,

     

    thanks for your reply.

    RED settings:

    Split Networks descriptions:

    The odd fact is, that if  we plug Internet cable from RED WAN port straight to VoIP device, IP phone works perfectly. If we plug Internet cable to RED WAN and connect VoIP device, lets say, to RED LAN1 port the phone rings, but there is no sound when try to answer.. :(

     

    BR,

    Rimas

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