I've just updated my 2860n+ to 3.7.8. I used the RST firmware as I was still having some problems with WiFi from time to time, and using the reset option was suggested as being the most sensible thing to do to resolve it.
After reconfiguring the router everything seemed to be great at first. But then I found I could not SSH to any external address. A little later I found I could not use the Pidgin chat client either. Nor could I access a particular web page over SSL that is firewalled to only accept connections from certain IPs (including my own).
Oddly, I could SSH from my Android phone (over Wifi).
And I could access other web pages over SSL from my PC - just not the one I needed.
After chasing my tail for ages trying to figure out what might be wrong, I found a new option in the GUI - Acceleration.
This was set to Auto. Setting it to Disabled resolved all my problems - ssh working, Pidgin working, and I can access the firewalled web page.
As a double-check, I set it to Auto again and BOOM, no SSH, no Pidgin, no firewalled web page.
And back to Disabled -- back to normal.
I'm not sure what to make of this. I don't really know what this option does other than Hardware Acceleration of downloads, whatever that really means.
Anyway, I thought I'd better post this here in case anyone else has mysterious problems - try disabling the Acceleration option to see if that resolves your issue.
