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If you run an Asterisk server which has the SIP ports exposed to the internet you have probably already noticed a ton of probes, connects which try to initiate calls to numbers with various prefixes. Although this doesn't do much harm if you did your homework and configured your Asterisk properly, it's still annoying. Here is how I deal with those:

Today I got a new notification on facebook, saying "Florin Georgian Voicilä also commented on", suggesting that I also commented on that page.

Well, I have not ever commented on "" and Florin Georgian Voicilä is neither in my friend list, nor did I subscribe to him. When I clicked on this notification, I was not ending up where I was expecting to...

Ever since has dropped all free services, I have been looking for good alternatives. Here in Finland, the IP addresses of the cable and DSL ISPs don't change excessively often, so for a while, it was ok for me to change the A record of my home server by hand in the cPanel DNS editor of my hoster.

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