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I have installed freeswitch on a machine which is kept in the LAN behind the firewall named PFSense.I was looking in the freeswitch logs and I found that there are some unknown sip request coming from the unknown IP from outside of the network.

I have not done any setting or port forwarding in the pfsense.But don't know why this is happening.Please tell me how can I block those requests.

Thanks

Vinay Saini
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1 Answers1

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it's most probably just typical port scanners. They scan for port 5060 and then try to send some INVITE or REGISTER requests there. It's quite harmless if your PBX is secure enough.

Stanislav Sinyagin
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  • thanks Stanislav,Is there any way I can block this port scanners.Or How can I secure my PBX. – Vinay Saini Feb 25 '15 at 13:04
  • here's my blog entry on related subject: https://txlab.wordpress.com/2013/06/29/protecting-a-vpbx-from-dos-attacks/ I simply limit the packet rate for SIP requests, so that they never overload my PBX. – Stanislav Sinyagin Feb 25 '15 at 16:09