Why is Skype banning my IP address?

Question

Skype

Good afternoon.
The first word in the title can be removed.
About four days ago, Skype stopped connecting to my network.
Rather, he actually connects, but pretends not to:
- at work, the blue connection icon is constantly spinning in the tray, everything is offline in the contact list. but after monitoring the connection logs on the firewall, I saw that it was trying to connect to a bunch of hosts. I don’t know how it occurred to me to write an offline contact, but the contact responded to me.
- almost the same at home - the carousel is spinning in the tray, but there is no connection.
At work and at home, different providers, different OS, different computers, different Skype accounts.
I don’t know what could be the matter, can anyone come across?
hint:Around the day Skype was off, I installed a Tor node both at home and at work on ordinary PCs (not a router, not a gateway), the Tor worked well. After the sides with Skype, everything was turned off everywhere, the problems remained.
In the Skype commune, I found a strange topic in which the support first froze for a long time, and then closed the topic for "srach".

Answer 1

Rather, not an answer, but in the piggy bank of the discussion:
I could not go to Skype with my friends, they themselves complained about it. Through VPN, Tor - it worked. Left it like that. Then Tor began to fall off regularly, switching output nodes saved. Now, indeed, I could not find a working one.
Looked through Wireshark - all connections are simply rejected. No firewalls, no ISP restrictions. Obviously a problem on the side of the Skype servers. This is with and without Tor. I tried to select free proxies - everything is ok, but they work very unstable.
Then I started looking at this topic on the Internet. It turned out that after the appearance of the hacked SkypeKit, hard blocking of both IP and entire subnets began. Information about this was on Habré (in the topic about the broken SkypeKit and the client). Those. it is enough for someone from your network to use the broken SkypeKit - and you will not be able to use Skype. With Tor'ami in this sense, too, everything is logical - they tried to throw connections through it and they all fell under blocking.
Wrote to the support (not on Tor, but to remove the block from the local IP). They told me they didn't block anything. I asked for clarification, since the problem is clearly on their side - they answered the same. I tried to insist - they still send it to the provider or network administrator.
Something like this. The problem is clear, but what to do is not clear. Ran friends through a free VPN.