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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
Hi Jason, the only ACL's on the vty's are the same across my entire farm of routers and switches. And when I telnet to a box with an ACL, I get a refused connection...this one is saying that it is timing out. On Wed, 28 Jul 2004 15:33:45 -0400 "Jason Frisvold" <[email protected]> wrote: > > 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." > > > > ****************************************** 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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