At the end it is not that bad. I don't need ssh to the device all the time, and when I do need - it is in the home/office environment. Just plugging it in and don't forget to switch back PSM when everything is done...
Perfect recipe to get a new router after couple of days of doing this though ;-)
I don't believe that it's router problem. My N800 works perfectly with incoming SSH on the same router(Netgear WGR614 v7). It's probably something with N900's implementation of PSM.
Right now the only solution for non-Linksys people seems to be turning off PSM temporarily.
I am using a AVM FritzBox! router and the problem is the same:
no reaction or reactions after 15 seconds and more. Sometimes the connection fails completely.
FritzBox! routers are very popular in Germany so I think this problem will have a lot of people here. I also have no problems with my N800 in the same network...
Should there be filled a bug report in the section:
Maemo Official Platform --> Connectivity --> WiFi?
Or should the be a bug report for openssh. If yes, where is the bug reporting site for maemo openssh?