TCP protocol not working

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konkon
Posts: 1
Joined: Sun Dec 17, 2017 4:17 pm

TCP protocol not working

Post by konkon » Sun Dec 17, 2017 4:26 pm

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.

thisjun
Posts: 2817
Joined: Mon Feb 24, 2014 11:03 am

Re: TCP protocol not working

Post by thisjun » Fri Jan 05, 2018 4:54 am

There is possibility that ISP change firewall settings.

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