We are using a RUT955 that forwards NMEA GPS data (GPRMC sentences) to a TCP server. Works like a charm except that it closes the connection directly after each sentence has been send and opens a new connection the next time. We have "Contain connection" enabled in the NMEA forwarding settings but it seems to make no difference if it is enabled or not. The server is not closing its socket after read so the problem is not located there (also it works, that is, keeps the connection, on other routers/brands we have tried with). Unfortunately I have no possibility to check the firmware version atm but wonder if this is an known issue and/or there is a way around it?