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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical ICMP Blocking Woes
Dear NANOG-ers, I work for an information security company that is dependant upon ICMP for network mapping purposes (read: traceroute). On or about August 18, we were told, our upstream provider began blocking ICMP packets at its border in the Chicago NAP in an effort to cut down on the propagation of 'MSBlast'. This has effected our ability to accurately map our customers networks. We've been in contact with an engineer in this provider's NOC who is either unable or unwilling to remove this ACL for our block of IPs. Currently, we've been given two options. (1) Deal with the effect of the ACL until 'MSBlast' traffic subsides, or (2) they are willing to reroute our traffic out of the Chicago NAP to a border router that, they claim, does not have the same ACL. The problem with option 2 is that they would force us to renumber. This is a problem for us, as it would impact our customers as well. What options can I take to my management that would cause the least impact to the services we provide while not causing undue work for our clients. Also, what other options could I suggest to my upstream provider? TIA, C. Windon __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com
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