Sjur Usken

Views on new technologies and business opportunities from Sjur Usken

Open letter to the people behind the SIP scans….

I have written a letter to the people in charge of the SIP scanning and owner of the network. I have now sent it to several IP responsible for those IP addresses.


Dear support personnel

We have repeatedly been scanned for open SIP (VoIP) access from IP
adresses:, and
The last time was February 27th 2010, but this scanning has been going
on for a long time, first reported back in December 2009.

We believe this is fraudulent activity to scan for open SIP gateways to
route traffic towards the telephony network.

Please inform the owners of these servers that this activity is not
tolerated and seen as an attack on our servers.



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