I've been using my DGL4500 for about a year now.  I do not remember what firmware version it came with, but up to today I was running 1.13.
I have a rather elaborate home network.  I have several laptops, multiple gaming systems, web & ftp servers, IP cameras and more.  I used to create rules so if I accessed my home IP:port# it would take me to whatever device I intended to access.  I think it was around FW 1.13 where this stopped working...
Due to my laziness I just haven't worried about it until today.  In hopes that itw as just a buggy FW I upgraded to 1.15.  However, the issues persist.  Every time I try to create a port forwarding rule or gaming rule the GUI just reverts back to the login screen after ~5 seconds.  When I go back to look to see the rules the list is blank.
Any suggestions?  I like this router, and I know it's capable of doing what I want it to do.  Something changed [software] and is screwing me up!  Thanks in advance.