It applies to 12.0 and later, so testing it on an 11.x router doesn't help. Owen
It appears that 2500 are not affected.
The fix below doesn't work on 11.1 and 11.2 , you have to turn snmp off by the looks.
have fun.
----- Forwarded message from "James A. T. Rice" <jamesr@rd.bbc.co.uk> -----
Date: Tue, 27 Feb 2001 00:39:38 +0000 (GMT) From: "James A. T. Rice" <jamesr@rd.bbc.co.uk> X-Sender: <jamesr@inet15> To: <members@lonap.net>, <ops@linx.net> Subject: Warning: Cisco RW community backdoor. Precedence: bulk
If your router responds to `snmpwalk router.isp.net.uk ILMI`, you probabally will want to do the following to disable it: conf t snmp-server community ILMI RO 99 access-list 99 deny any log (pick another spare access-list if 99 isn't available)
If you dont, assuming your ios/hardware combination supports it, (most of the bigger routers do) anyone can do things like: `snmpset router.isp.net.uk ILMI system.sysName.0 s \ "ALL YOUR ROUTER ARE BELONG TO US."` Thats a harmless example. You can do almost anything with RW snmp.
Warm Regards James
-- James A. T. Rice | Email: jamesr@rd.bbc.co.uk Internet Operations Engineer | Phone: 01737 839 737 BBC Internet Services, Kingswood Warren, Tadworth, Surrey, UK.
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