today my tunnel stopped working after doing the job flawlessly for months

[topez]

I have a tunnel to the frankfurt pop and it worked fine over the last several months. However since today it is down. My ip changes every 24 hours, so my update script is not the problem. I logged in with the webinterface and it also confirmed the settings were submitted properly. My box is pingeable via ipv4 and the interfaces work properly. But I can ping my tunnel endpoint but not the endpoint with he. Any known problems?