blocking remote telnet -- SECURITY400

Subject: blocking remote telnet
From: "Jim Franz" <franz400@xxxxxxxxxxxx>
Date: Tue, 5 Jun 2007 22:54:27 -0400
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Customer's network admin swears firewall blocks port 23 (telnet, both tcp&udp).
I tested remotely from windows, and telnet appears blocked.
But I have a couple pages of someone remotely trying to guess a password
for "root" and "admin" with existing virtual device names like qpadev0001.
My TCP Service table says telnet is 23.
No ssl configured, but telnet-ssl is port 992.
Is there another service or port to block ???
Netstat is showing several services listening that I don't recognize.
Any reference to all the services and what starts them?
jim franz

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