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    Strange PBX CDR Entries

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    freepbx 14 security sip
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    • EddieJenningsE
      EddieJennings
      last edited by

      So here's a sample from my one extension FreePBX lab box. With my one experience with toll fraud at my last company, I'm quite interested in figuring out what's going on.
      0_1538534846428_9c54b703-710b-4d6b-aabd-5681d32e85f0-image.png

      Looking at voip.ms and seeing 4 total calls for today (time in the above picture is UTC), this looks like traffic isn't coming from or going out the PSTN.

      Here is the detail for the first entry from the above log.
      0_1538535044975_41ef79e3-13f7-464d-8cd4-bcdf4c61d135-image.png

      My suspicion (because of the from-sip-external) context, is this is a SIP request from $badBot trying to make a call to extension 9121. . .

      From my SIP settings (pretty sure this is default for FreePBX), it looks like I do allow guests, but not anonymous inbound SIP calls.
      0_1538535425665_1f9662c9-1a91-4e56-b6cd-32ade950ab7d-image.png

      Is my suspicion right?

      JaredBuschJ 1 Reply Last reply Reply Quote 0
      • JaredBuschJ
        JaredBusch @EddieJennings
        last edited by JaredBusch

        @eddiejennings said in Strange PBX CDR Entries:

        So here's a sample from my one extension FreePBX lab box. With my one experience with toll fraud at my last company, I'm quite interested in figuring out what's going on.
        0_1538534846428_9c54b703-710b-4d6b-aabd-5681d32e85f0-image.png

        Looking at voip.ms and seeing 4 total calls for today (time in the above picture is UTC), this looks like traffic isn't coming from or going out the PSTN.

        Here is the detail for the first entry from the above log.
        0_1538535044975_41ef79e3-13f7-464d-8cd4-bcdf4c61d135-image.png

        My suspicion (because of the from-sip-external) context, is this is a SIP request from $badBot trying to make a call to extension 9121. . .

        From my SIP settings (pretty sure this is default for FreePBX), it looks like I do allow guests, but not anonymous inbound SIP calls.
        0_1538535425665_1f9662c9-1a91-4e56-b6cd-32ade950ab7d-image.png

        Is my suspicion right?

        This is correct. You don't want that on unless you plan to setup direct SIP URI calling, not through a trunk.

        1 Reply Last reply Reply Quote 0
        • EddieJenningsE
          EddieJennings
          last edited by

          I've disallowed SIP guests. We'll see if I get future CDR entries like these.

          JaredBuschJ 1 Reply Last reply Reply Quote 0
          • JaredBuschJ
            JaredBusch @EddieJennings
            last edited by

            @eddiejennings said in Strange PBX CDR Entries:

            I've disallowed SIP guests. We'll see if I get future CDR entries like these.

            You won't.

            1 Reply Last reply Reply Quote 0
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