Rogue SIP calls on C40

Hello

We have a videoconference system with the public IP address that is registered in the VCS-E received various rogue SIP calls.  All these SIP calls are aliases for figures 3-6 during 32sec each.  The calling address entering is: alias @ public IP address of our VC system. All calls are video calls to 384 k

To avoid calls, I disabled the SIP option and since then we have not received one of these calls.  However, we need to connect to other devices using SIP.  Is there another way to stop these calls?

Thanks in advance for your help.

Amrit

Make the following settings on your endpoints:

  • xConfiguration SIP ListenPort: Off
  • xConfiguration SIP profile 1 out: on

See bug CSCue55239 for more details.

You will also need to take steps to secure your VCS if you have not already, turning off UDP SIP SIP calls stop.  However, last year, we saw these calls come on H323 TCP, the only way to stop calls H323 is either secure endpoint behind your firewall and use a script CPL on the VCS.  See the analysis of sourceh323idcisco-incomingcalls on how to configure a CPL.

FYI, the forums to search would be my first place to look, or search for bugs.  He is asked everywhere in the forums.

Tags: Cisco Support

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    Work of appeal with TC 7.1.4
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    Whenever I force the same protocol. That is to say, H.323 to SIP for SIP or H.323 and making the same calls, the site B (C20) is not video of the Site (C40). However the C40 receives both video & audio of the C20. What is interesting, is that if I do the same calls of the MCU, which is also in Site A, then there is no problem. So the problem is between the C40 and C20.
    Since I'm not physcally on sites because I do this execution remotely, I can count only on the stats I get from the GUI. I have attached a photo taken of the customer from the screen of the C20.

    Calls:
    Calls crossing
    C40 - C20 H.323 - SIP - call ok
    C20 - C40 H.323 - SIP - call ok
    C40 - C20 SIP - H.323 - call ok
    C20 - C40 SIP - H.323 - call ok
    MCU - C20 H.323 - H.323 - call ok

    Non-Traversal calls
    C40 - C20 H.323 - H.323 - no video received the C20
    C40 - C20 SIP - SIP - no video received the C20
    C20 - C40 H.323 - H.323 - no video received the C20
    C20 - C40 SIP - SIP - no video received the C20

    This suggests that there is only a problem on the C20 in non-traversal calls. I don't want to use licensed traveled between these 2 points of termination.

    Thank you for your help. Any input would be greatly appreciated.

    -Greg

    When you make an H323, SIP call, all media is 'mandated' by the VCS, so they would still work even if they cannot ping each other.  When you do a non-traversal call, media flows directly between the endpoints.

    Ping a C-Series, connect to the codec via SSH (same credentials as the Web browser), and then type systemtools network ping 10.1.1.1

    Where "10.1.1.1" is the IP address of the remote end point.

  • Source IP address of the originating call to sip trunk

    I'm unable to set address ip source from trunk sip call. I read somewhere that the source ip address of the call must be the ip address that call device registered to. I also checked "run in all active nodes such as suggested by cisco. We have 3 Sub cluster and 1 pub however still call orgianate to a particular Sub.

    I also undergoes several changes i - e DP and list route but think not worked for me. Can someone help to sortout this problem?

    Let's say if your ip phone registered in sub - and "run on all nodes" enabled, then the source ip address is always sup - A s ip address regardless of the device pool config on the sip trunk.

    Could please explain you the device pool config in phones IP & SIP trunk?

    you have enabled the "run on all nodes" for a list of course also?

    Suresh

    Please note all useful messages.

  • How to replace the call number part on a SIP section if none is present

    Hello

    I have a 2821 router that is connected to a SIP trunk.  This router also has a PRI interface that is connected to a PBX Mitel.  The Mitel used the router has a primary connection to the PSTN.

    The Mitel will send the party call number most of the time, but sometimes it isn't.  All calls that are sent to the SIP provider without a party call number are deleted.  I don't know if can substitute part number calling using the command in clid on the Dáil peer, however is it possible only override the calling party number if I do not get one of the Mitel?  He got a number of appeal left like a DID I want to pass along in the SIP call.

    Thank you.

    You should be able to do it with a voice translation rule that matches an empty ANI.
    30rule translation-rule voice 1 / ^ $\+631689\(...\) / / 01689\1/rule 2 / ^ $/ /555666777/
    translation-profile PSTN-OUTtranslate of the voice calling 30

    First rule to match a real number to a PBX, to adapt according to your needs. The second rule matches a null value and changes to 555666777, who adapt to what you would like to send to your phone company.

    Do not forget to rate helpful responses and identify useful or correct answers.

  • SIP spam attack and MCU and vcs - e call

    as far as I know sip call spam attacks is done against the videoconference, connected with a public ip address, I disabled the sip but im not sure if my mcu and vcs - e with sound are vulnerable to them? they pose no threat to security for them? and if so, how? and what can we do about it?

    It is a well known problem and it affects H.323 and SIP, take a look at the below threads:

    https://supportforums.Cisco.com/discussion/12340591/nuisance-h323-calls-SX20

    https://supportforums.Cisco.com/discussion/12336591/sourceh323idcisco-incomingcalls

    https://supportforums.Cisco.com/discussion/12508641/Cisco-source-spam-calls-stepped-complexity

    https://supportforums.Cisco.com/discussion/12613681/attack-vcse

    There are many more discussions on this issue, the above, this is just a small selection. :)

    You do not need to disable SIP on the VCS-E, all you need to do is turn SIP UDP unless you need it for voice services.

    You can protect yourself by using a CPL on the VCS-E who will avoid calls to go through your MCU, or anything else you have sitting behind the VCS-E. This is assuming that you are using a combo of VCS-C/VCS-E, with the VCS - C behind a firewall and the VCS-E outside the firewall, for example in the demilitarized zone.

    Having just trouble ask points of termination or MCU sitting in nature with public IP addresses.

    These scans, moreover, mainly looking for systems that will allow them to make free international calls.

    /Jens

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