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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Loss of Telnet Capability to 6509
Do you have ACL's restricting access to the vty's? I've seen instances where telnet ports get locked up because of port scanning and/or attacks... -- Jason Frisvold Penteledata > -----Original Message----- > From: Richard J. Sears [mailto:[email protected]] > Sent: Wednesday, July 28, 2004 2:54 PM > To: Nanog > Subject: Loss of Telnet Capability to 6509 > > > > We posted this to cisco-nsp but someone suggested posting it here as > well... > > > > We have a 6509 running a SUP720 in IOS only mode (no cat os). > > At around 4am this morning, we lost our ability to telnet to > the router. > Running a tcpdump shows that the router never responds to the telnet > request. > > All functions and interfaces on the router seem fine (bgp, > etherchannel, > ibgp, vtp, hsrp) and I can console into the sup with no > problems at all, > we just cannot telnet into it. The CPU is at around 6%. > > I have checked all access lists on the router, none were added/removed > or modified on line vty that would cause this problem. All logging > appears normal. > > We are running Version 12.2(17a)SX3. > > Anyone have a similar problem or know how to check or restart > the telnet > process on the router without a reload...? > > > ****************************************** > Richard J. Sears > Vice President > American Digital Network > ---------------------------------------------------- > [email protected] > http://www.adnc.com > ---------------------------------------------------- > 858.576.4272 - Phone > 858.427.2401 - Fax > INOC-DBA - 6130 > ---------------------------------------------------- > > I fly because it releases my mind > from the tyranny of petty things . . > > > "Work like you don't need the money, love like you've > never been hurt and dance like you do when nobody's > watching." > >
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