To your attention: This comes from limited experience with one version of the 9606 firmware (v3.0.3) on MasterSwitch 9xxx series, tested across many of the devices: Although provided an option to disable telnet administratively via the Web interface as well as the Telnet interface itself - telnet does *NOT* actually gets disabled. It disables itself for a matter of approx +/- 20 seconds, and comes back as if nothing ever happened. Repeating attempts to disable telnet access are futile. The only effective method of preventing possible exploitation seems to be filtering port 23 on the network level. This seems to be another firmware issue. Please check your APC's using 9606, your sense of security from disabling telnet might be false :( --- David 'wEEkAY' Monosov david dot monosov at futureinquestion dot net