I updated my package squid the latest version (Squid Stable 2.7.9 pkg v.4.3.1). I then realised that I was not able to access my remote webgui any more from my internal network using my dyndns.org address + port. Externally it still works fine. I have checked all my setting nat rules, enabled nat reflection, squid safeports.
Also if I don't use the proxy server internally it also works fine.
Any Idea's would be helpful