The Advisory affects *ALL* routers and switches running IOS versions below 12.3
The access-lists are a work-around / stop-gap measure until you upgrade your IOS to a release that has a fix for the vulnerability. However, with what I have seen and heard over the last few weeks, use the access-lists and *don't* upgrade your IOS without proper planning. I have seen some overzealous network engineers crash their routers by loading the wrong IOS for the hardware(DRAM/Flash) they currently have. HTH George Murage -----Original Message----- From: Mr piyush shah [mailto:[EMAIL PROTECTED] Sent: Monday, August 04, 2003 2:51 PM To: [EMAIL PROTECTED] Subject: Cisco Security Advisory: Cisco IOS Interface Blocked by IPv4 [7:73471] Dear all Recently there was an article on Cisco Security Advisory which stated that all Cisco routers/switches having IOS as their operating system,their Interfaces will be blocked by IPv4 Packets.In this regard,i have a querry. Is it that all the router having IOS will be blocked or certain specific IOS ? Also they have given fixes at the bottom of that article which states about access-list,do one need to go ahead with implementation of these Acess-lists? Kindly help. Thanks in advance. Piyush ________________________________________________________________________ Send free SMS using the Yahoo! Messenger. Go to http://in.mobile.yahoo.com/new/pc/ **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73707&t=73707 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
