Take the 2-minute tour ×  I have a web server, which was working
fine. It also was an FTP server and a Windows Remote Desktop
server, all working fine. Someone called our ISP to increase the
internet speed, and suddenly nothing works - I can connect with
Teamviewer, but HTTP, FTP & RD doesn't work.    • Disabled
firewall.   • Ran Wireshark - the packets don't come through at
all.   • Set the webserver to port 20111, in case the ISP is
blocking port 80, and again, the packets didn't come through at
all. (localhost:20111 works fine)   • Port forwarding is set up
for ports 80, 21, 3389 & 20111 to (which is the correct address
- checked with ipconfig).   • Restarted router and computer.  I
would be very grateful for any help.  share|improve this
question  2 Answers 2  If Teamviewer works then the problem is
ISP, i suspect. If you could try connecing any computer to the
WEB end of the router, and your web server would work, you could
confirm it is the case. TeamViewer works by UDP hole punching,
like Hamachi and t