Hi, Just out of the box, bought a v4 WRT54GS (EU version). Installed and ready to use but no WEP 128 bits encryption security possible. Connecting wirelessly is ok, without Encryption. But without any Mac filter and so on but putting on WEP, the device cannot connect, although the client has the right (wep)key. Authentication is set "auto". Client is set to WEP, then "open". Same key. SSID enabled before connecting. Now the situation is SSID disabled, Mac filter installed but no Encryption. It is just not possible to secure the wireless network. What's going on ?!