Sunday, April 19, 2009

telnet prohibited

How can you prevent a telnetted user telnetting out to another a router??

Simply:

R1
conf t
line vty 0 4
transport output none


I telnet to router 1 and attempt to open a further telnet session

R1>telnet 160.1.1.2
% telnet connections not permitted from this terminal

Job done!

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