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TCP protocol not working

Posted: Sun Dec 17, 2017 4:26 pm
by konkon
Hello, I use VPN Gate public servers, which support both TCP and UDP protocol. Both used to be fine, but now, TCP protocol doesn't work at all and automatically redirects me to "Error 2 : Protocol Error". UDP seems to work fine.
Where do you think the issue comes from ? VPN Gate servers, SoftEther software, or my firewall ? What are the actual difference between TCP and UDP protocols ? I'm confused because both seemed to work before, and I didn't edit my firewall configuration...

Thank you in advance for your answers.

Re: TCP protocol not working

Posted: Fri Jan 05, 2018 4:54 am
by thisjun
There is possibility that ISP change firewall settings.