April 1998 - Test - lists.nanog.org

Re: Dijkstra Simulator
by Daniel O. Awduche 11 Jun '98

11 Jun '98

The WANDL network planning and analysis software can be used for this purpose (and much more). Alternatively, you can trivially write an all "pairs shortest path" program, using, for example, the Floyd-Warshall dynamic programming algorithm (See "Introduction to Algorithms," by Corman, Leiserson, and Rivest). The same result can be gotten by running Dijkstra's algorithm |V| times (once for each node), where |V| is the cardinality of the set of nodes in your network graph. /Dan. Alan Hannan said: > > Could someone provide a reference for a Dijkstra simulator? > > Ideally this would take three sets of inputs (links, nodes, > metrics) and produce edge-pair traffic flows. > > Any suggestions appreciated, especially for GPL stuff that has > code. > > -a

3 2

Re: IP over SONET considered harmful?
by avg＠pluris.com 06 Jun '98

06 Jun '98

> Subject: IP over SONET considered harmful? > > I'd hoped that MPLS would solve this problem, but from reviewing > the drafts I believe that the LSRs _WILL_ decrement the TTL. I think this is a non-issue, considering that with the next generation of IP-only boxes ATM will become hopelessly useless. Better yet, the real big boxes are removing any need to do clustering, so the average number of IP hops for an NSP is going to be like 3 or 4. --vadim

6 5

Re: SMURF amplifier block list
by Sean M. Doran 27 May '98

27 May '98

| Posting it here weekly only provides a mechanism for the littele fsckers | that smurf to gain an up to date list of sites to bounce from. And consequently increases the liklihood that more networks will refuse traffic to or from these networks, which in turn increases the pressure on these sites to wonder what is happening to their connectivity and how to repair it. Which may just solve the problem. This is a monumental admission: I think Karl is doing the right thing. Sean.

43 112

Re: Two renumbering questions
by Joe Provo - Network Architect 05 May '98

05 May '98

> My ISP is changing upstreams for a variety of reasons around May 18th. > > 1. I have a /24 SWIPed to me, 205.238.207.0. The ARIN listing doesn't say > it's non-portable, so can I take it with me? The ARIN db lost all portable/non-portable atributes in the conversion. Unless folks have gone back and requested they get re-tagged, portability is unclear from the ARIN db. [snip] > rather than filtered for being too long? It's right in the middle of the old > upstream's block 205.238.192/18. If it is a singleton hole in a /18, your most net-friendly action would be to voluntarily renumber. The provider's most net-friendly action would be to indicate it was non-portable. [snip] > (There's other servers elsewhere that won't get renumbered.) If I tell the > Internic that ivan's host number has changed, will that update all the > domains served from it? Yes, that's the purpose of the HST record. Update the HST and you're all set. Joe -- Joe Provo, Network Architect 508.229.8400 x3006 Network Operations Center Fax 508.229.2375 UltraNet Communications, Inc., an RCN Company <jprovo(a)ultra.net>

6 5

SMURF amplifier page
by Karl Denninger 04 May '98

04 May '98

As promised, we now have a web page for this. The current smurf list is at http://www.mcs.net/smurf This will be updated roughly weekly, or whenever major changes are made to the list of blocked networks. It contains, in addition to dialogue on the Smurf issue, a list of network numbers and "whois" lookups on the owners. IF YOU APPEAR ON THIS LIST YOU CANNOT TRANSPORT PACKETS INTO OUR INFRASTRUCTURE. Instructions for what you must do to get the block removed are contained within this page. Bitching and moaning is pointless - the only fix is to FIX THE PROBLEM. Thank you! -- -- Karl Denninger (karl(a)MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly / All Lines K56Flex/DOV | NEW! Corporate ISDN Prices dropped by up to 50%! Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost

11 16

SMURF AMPLIFIER BLOCK LIST -- VERY LARGE!!!!!!!!!!!!!!!
by Martin, Christian 01 May '98

01 May '98

All, Here is my contribution to the block list. The script that generated this will follow. It is 'public domain', in that it can be modified, BUT, please give credit where credit is due! !!!!!NOTE: This script assumes that the offending bounce sites are /24 blocks. It isn't that smart yet, but if someone can figure out a way to glean more info, modify the script and repost. #!/bin/ksh # ------------------------------------------------------------------------ -- # @(#) File: catch.sh by Kevin A. Ho and Christian Martin Release 1.0 # # Description: This script reads a NetFlow log produced on Cisco routers # that employ NetFlow switching. The script parses the log # and generates the network address of the amplifying network. # Then, the script runs the netblock (assumes a /24 mask) # against your favorite route-server (could use a gated box # as well) and pulls the originating AS from the BGP table. # Then, it runs the AS pulled from the route server against # the "whois" query program to obtain the AS info and # other related info on the network address. # ------------------------------------------------------------------------ -- LOGFILE=$1 WHOIS=/usr/bin/whois WHOIS_SRVR=whois.ra.net ROUTE_SRVR=route-server.cerf.net TARGET=$2 case $# in 1) IPlist[0]=$1 ;; *) print "Building network address list ..." set -A IPlist `awk '{if(($5 == "01")&&($4 == TG)) print $2}' TG=$TARGET ${LOGFILE} | awk -F"." '{ printf("%s.%s.%s.0\n", $1, $2, $3)}' | sort -u` ;; esac for IPaddr in ${IPlist[*]} do print ${IPaddr} done __________________________________________ HERE IS THE LIST 10.10.100.0 10.128.14.0 10.158.36.0 10.3.0.0 10.3.1.0 10.4.0.0 100.100.1.0 12.0.40.0 12.1.9.0 12.10.2.0 12.10.6.0 12.10.7.0 12.11.0.0 12.127.114.0 12.127.192.0 12.127.240.0 12.13.1.0 12.3.0.0 12.4.5.0 12.63.7.0 12.7.2.0 125.83.77.0 127.0.0.0 128.1.21.0 128.135.111.0 128.135.113.0 128.135.115.0 128.135.117.0 128.135.168.0 128.135.2.0 128.135.253.0 128.135.4.0 128.135.47.0 128.135.61.0 128.135.70.0 128.135.76.0 128.135.91.0 128.135.99.0 128.203.208.0 128.252.152.0 128.252.221.0 128.252.223.0 128.252.233.0 128.252.234.0 128.252.7.0 128.252.84.0 128.39.0.0 128.39.16.0 128.39.3.0 128.97.172.0 128.97.173.0 128.97.21.0 129.210.11.0 129.210.208.0 129.210.209.0 129.210.210.0 129.210.211.0 129.210.40.0 129.210.42.0 129.210.43.0 129.210.8.0 129.210.84.0 129.210.87.0 129.241.181.0 129.241.200.0 130.15.1.0 130.15.8.0 130.194.225.0 130.194.25.0 130.194.31.0 130.195.2.0 130.198.253.0 130.236.252.0 130.236.254.0 130.237.1.0 130.237.245.0 130.237.247.0 130.237.28.0 130.237.32.0 130.237.72.0 130.237.9.0 130.239.136.0 130.239.5.0 130.242.100.0 130.244.10.0 130.244.12.0 130.244.136.0 130.244.16.0 130.244.2.0 130.244.24.0 130.244.25.0 130.244.3.0 130.251.21.0 130.251.86.0 130.79.200.0 130.79.23.0 130.79.32.0 130.79.36.0 131.1.183.0 131.1.184.0 131.1.185.0 131.1.186.0 131.1.187.0 131.1.188.0 131.1.189.0 131.115.126.0 131.115.184.0 131.115.185.0 131.115.189.0 131.115.47.0 131.115.48.0 131.115.49.0 131.119.16.0 131.154.1.0 131.175.223.0 131.175.238.0 131.175.242.0 131.175.57.0 131.178.1.0 131.178.38.0 131.178.60.0 134.124.99.0 134.153.2.0 134.153.240.0 134.153.80.0 134.184.1.0 134.184.129.0 134.184.15.0 134.184.250.0 134.184.30.0 134.184.31.0 134.184.32.0 134.184.66.0 134.222.12.0 134.222.2.0 134.222.200.0 134.222.28.0 134.222.30.0 134.58.24.0 134.58.25.0 134.58.255.0 134.58.40.0 134.58.41.0 134.58.43.0 134.58.45.0 134.58.61.0 134.59.1.0 134.87.109.0 134.87.18.0 134.87.96.0 134.87.98.0 134.92.229.0 137.121.1.0 137.121.254.0 137.204.64.0 137.39.139.0 137.39.178.0 138.195.33.0 138.200.111.0 138.200.65.0 138.200.66.0 138.200.68.0 138.200.70.0 138.200.77.0 138.73.1.0 139.130.1.0 139.130.10.0 139.130.120.0 139.130.128.0 139.130.159.0 139.130.2.0 139.130.3.0 139.130.43.0 139.130.48.0 139.130.6.0 139.130.64.0 139.130.65.0 139.130.76.0 139.130.79.0 139.165.30.0 139.165.32.0 139.165.40.0 139.223.200.0 139.3.63.0 139.4.26.0 139.57.16.0 139.58.230.0 140.127.240.0 140.78.1.0 140.78.127.0 140.78.222.0 140.78.223.0 140.78.93.0 140.96.70.0 141.108.220.0 141.108.253.0 141.66.176.0 142.103.3.0 142.132.1.0 142.165.5.0 142.22.218.0 142.232.83.0 142.232.84.0 142.51.1.0 142.58.12.0 142.58.145.0 142.74.1.0 143.169.5.0 143.225.190.0 143.233.122.0 143.233.123.0 143.43.128.0 143.43.130.0 143.43.131.0 143.43.133.0 143.43.3.0 144.228.131.0 144.85.1.0 144.85.10.0 144.85.200.0 144.85.207.0 144.85.3.0 145.228.110.0 145.228.114.0 145.228.200.0 145.228.222.0 145.228.95.0 146.83.1.0 147.102.12.0 147.102.13.0 147.102.222.0 147.151.103.0 147.151.171.0 147.162.1.0 147.162.199.0 147.162.8.0 147.162.99.0 147.211.45.0 147.211.55.0 147.250.1.0 147.83.124.0 147.83.32.0 147.83.4.0 147.83.41.0 147.91.1.0 147.91.8.0 147.96.1.0 147.96.10.0 147.96.100.0 147.96.19.0 147.96.20.0 147.96.21.0 147.96.22.0 147.96.23.0 147.96.24.0 147.96.25.0 147.96.3.0 147.96.33.0 147.96.37.0 147.96.4.0 147.96.42.0 147.96.5.0 147.96.6.0 147.96.90.0 148.202.1.0 148.202.2.0 148.202.3.0 148.202.34.0 148.202.4.0 148.202.5.0 148.202.8.0 148.202.93.0 148.206.128.0 148.206.32.0 148.207.1.0 148.207.10.0 148.207.100.0 148.207.104.0 148.207.2.0 148.207.20.0 148.207.25.0 148.207.38.0 148.207.40.0 148.214.12.0 148.214.13.0 148.225.14.0 149.142.172.0 149.142.47.0 150.146.201.0 150.146.5.0 150.162.1.0 150.162.237.0 150.162.248.0 150.162.254.0 150.163.130.0 150.210.23.0 150.210.24.0 150.210.25.0 150.210.26.0 150.210.3.0 150.210.33.0 150.214.110.0 150.214.112.0 150.214.115.0 150.214.163.0 150.214.169.0 150.214.218.0 150.214.231.0 150.214.32.0 150.214.35.0 150.214.69.0 151.99.0.0 151.99.107.0 151.99.155.0 151.99.48.0 152.74.49.0 152.74.52.0 152.84.100.0 152.84.254.0 154.11.136.0 154.11.8.0 155.105.102.0 155.105.2.0 155.105.255.0 155.105.3.0 155.207.100.0 155.207.112.0 155.207.18.0 155.207.19.0 155.207.199.0 155.207.26.0 155.207.30.0 156.14.1.0 156.14.20.0 156.14.254.0 156.14.30.0 157.130.0.0 157.130.225.0 157.130.33.0 157.130.5.0 157.138.1.0 157.138.115.0 157.161.254.0 157.169.10.0 157.27.32.0 157.27.6.0 157.88.142.0 157.88.143.0 157.88.31.0 157.92.1.0 158.122.64.0 158.122.65.0 158.122.90.0 158.227.6.0 158.251.1.0 158.251.12.0 158.251.16.0 158.251.17.0 158.251.18.0 158.251.19.0 158.251.20.0 158.251.250.0 158.251.3.0 158.251.4.0 158.37.1.0 158.47.18.0 158.47.4.0 158.49.129.0 158.49.133.0 158.49.134.0 158.49.137.0 158.49.247.0 159.84.12.0 160.97.1.0 160.97.225.0 160.97.4.0 160.97.5.0 160.97.52.0 161.142.0.0 161.142.100.0 161.142.2.0 161.142.227.0 161.142.24.0 161.142.8.0 163.117.131.0 163.13.1.0 163.13.140.0 163.13.141.0 163.15.250.0 163.15.252.0 163.179.230.0 163.9.4.0 164.128.116.0 164.128.119.0 164.128.122.0 164.128.123.0 164.128.57.0 164.128.81.0 164.15.44.0 164.15.89.0 164.41.2.0 165.154.1.0 165.154.105.0 165.154.140.0 166.48.38.0 168.8.16.0 169.226.116.0 169.226.2.0 169.226.23.0 169.226.28.0 169.226.38.0 169.226.4.0 170.210.0.0 172.16.0.0 172.16.1.0 172.16.2.0 172.16.4.0 172.17.50.0 172.21.10.0 172.31.7.0 18.26.0.0 192.0.1.0 192.100.161.0 192.100.180.0 192.100.181.0 192.106.1.0 192.106.7.0 192.107.131.0 192.107.51.0 192.107.52.0 192.107.53.0 192.108.114.0 192.109.80.0 192.109.81.0 192.12.77.0 192.121.120.0 192.121.83.0 192.129.50.0 192.132.41.0 192.134.106.0 192.134.130.0 192.134.192.0 192.135.34.0 192.135.68.0 192.139.190.0 192.139.196.0 192.139.197.0 192.139.230.0 192.139.245.0 192.147.246.0 192.148.167.0 192.150.75.0 192.159.121.0 192.16.137.0 192.165.120.0 192.165.146.0 192.165.243.0 192.167.13.0 192.167.192.0 192.167.198.0 192.168.0.0 192.168.1.0 192.168.10.0 192.168.11.0 192.168.122.0 192.168.162.0 192.168.168.0 192.168.177.0 192.168.191.0 192.168.199.0 192.168.2.0 192.168.203.0 192.168.21.0 192.168.250.0 192.168.5.0 192.168.6.0 192.168.66.0 192.176.122.0 192.190.209.0 192.197.60.0 192.2.200.0 192.228.128.0 192.33.182.0 192.36.60.0 192.36.97.0 192.4.0.0 192.41.218.0 192.44.77.0 192.5.82.0 192.54.144.0 192.54.174.0 192.54.188.0 192.54.242.0 192.6.5.0 192.65.91.0 192.67.248.0 192.68.63.0 192.70.23.0 192.70.34.0 192.70.57.0 192.70.82.0 192.70.87.0 192.70.98.0 192.71.157.0 192.71.57.0 192.72.111.0 192.72.151.0 192.72.24.0 192.72.33.0 192.75.204.0 192.75.205.0 192.75.62.0 192.82.124.0 192.83.196.0 192.84.152.0 192.89.123.0 192.93.29.0 192.93.74.0 192.93.8.0 192.93.80.0 192.93.82.0 192.95.223.0 193.10.48.0 193.10.49.0 193.10.50.0 193.10.62.0 193.103.148.0 193.103.168.0 193.104.101.0 193.105.56.0 193.114.246.0 193.118.192.0 193.118.200.0 193.12.151.0 193.12.69.0 193.12.71.0 193.122.87.0 193.127.1.0 193.13.131.0 193.13.144.0 193.14.104.0 193.14.11.0 193.14.29.0 193.14.68.0 193.141.156.0 193.141.171.0 193.141.232.0 193.141.241.0 193.141.75.0 193.141.76.0 193.141.77.0 193.141.78.0 193.144.75.0 193.145.132.0 193.145.133.0 193.145.222.0 193.145.248.0 193.145.254.0 193.145.40.0 193.145.41.0 193.145.54.0 193.145.59.0 193.145.60.0 193.145.61.0 193.146.95.0 193.15.20.0 193.15.241.0 193.15.55.0 193.15.86.0 193.156.89.0 193.156.92.0 193.158.124.0 193.164.160.0 193.164.161.0 193.164.172.0 193.170.33.0 193.170.35.0 193.171.114.0 193.171.20.0 193.171.22.0 193.180.104.0 193.182.172.0 193.189.224.0 193.189.241.0 193.189.249.0 193.190.10.0 193.190.144.0 193.190.170.0 193.190.171.0 193.190.192.0 193.190.194.0 193.190.196.0 193.190.197.0 193.190.2.0 193.190.231.0 193.190.249.0 193.192.192.0 193.192.193.0 193.192.199.0 193.192.200.0 193.192.206.0 193.192.225.0 193.192.23.0 193.204.120.0 193.204.16.0 193.204.191.0 193.204.208.0 193.204.210.0 193.204.30.0 193.204.64.0 193.205.160.0 193.205.165.0 193.205.189.0 193.205.190.0 193.216.236.0 193.216.250.0 193.252.19.0 193.252.235.0 193.252.252.0 193.36.32.0 193.36.37.0 193.38.83.0 193.38.84.0 193.43.43.0 193.43.44.0 193.44.236.0 193.44.5.0 193.44.90.0 193.45.158.0 193.45.251.0 193.45.79.0 193.48.145.0 193.48.168.0 193.48.198.0 193.48.200.0 193.48.226.0 193.48.24.0 193.48.241.0 193.48.39.0 193.48.40.0 193.48.45.0 193.48.75.0 193.49.105.0 193.49.112.0 193.49.164.0 193.49.205.0 193.49.29.0 193.49.67.0 193.5.152.0 193.5.153.0 193.5.154.0 193.5.54.0 193.5.56.0 193.50.217.0 193.50.225.0 193.50.235.0 193.51.104.0 193.51.105.0 193.51.136.0 193.51.198.0 193.51.80.0 193.51.86.0 193.52.10.0 193.52.211.0 193.52.223.0 193.52.72.0 193.52.80.0 193.52.81.0 193.54.185.0 193.54.208.0 193.54.232.0 193.54.238.0 193.54.42.0 193.54.98.0 193.55.218.0 193.55.220.0 193.55.96.0 193.56.4.0 193.71.3.0 193.74.243.0 193.80.12.0 193.80.60.0 193.90.64.0 193.92.3.0 193.98.1.0 193.98.110.0 193.98.230.0 193.98.9.0 193.98.90.0 194.103.200.0 194.103.205.0 194.106.165.0 194.106.254.0 194.109.7.0 194.109.9.0 194.115.115.0 194.115.128.0 194.117.203.0 194.117.204.0 194.118.1.0 194.118.23.0 194.118.26.0 194.119.216.0 194.119.225.0 194.119.228.0 194.120.12.0 194.120.124.0 194.120.40.0 194.122.108.0 194.122.231.0 194.122.236.0 194.122.240.0 194.123.81.0 194.133.98.0 194.134.5.0 194.137.236.0 194.137.237.0 194.139.104.0 194.148.1.0 194.158.141.0 194.158.154.0 194.158.155.0 194.158.96.0 194.158.97.0 194.16.110.0 194.16.184.0 194.16.186.0 194.16.190.0 194.16.2.0 194.16.207.0 194.16.50.0 194.162.192.0 194.162.200.0 194.162.25.0 194.162.252.0 194.162.253.0 194.162.254.0 194.162.27.0 194.162.29.0 194.162.66.0 194.162.73.0 194.163.184.0 194.164.0.0 194.164.70.0 194.167.133.0 194.167.136.0 194.167.138.0 194.167.139.0 194.167.147.0 194.167.148.0 194.167.195.0 194.168.23.0 194.168.7.0 194.17.121.0 194.17.162.0 194.17.163.0 194.17.177.0 194.172.112.0 194.174.238.0 194.174.252.0 194.175.112.0 194.175.173.0 194.177.121.0 194.177.122.0 194.177.124.0 194.177.125.0 194.177.127.0 194.177.208.0 194.179.10.0 194.179.100.0 194.179.107.0 194.179.13.0 194.179.21.0 194.179.29.0 194.179.46.0 194.179.47.0 194.18.124.0 194.18.161.0 194.18.197.0 194.18.34.0 194.18.35.0 194.18.47.0 194.18.60.0 194.184.1.0 194.184.148.0 194.184.179.0 194.184.204.0 194.185.134.0 194.185.148.0 194.198.105.0 194.198.203.0 194.199.140.0 194.199.58.0 194.2.12.0 194.2.16.0 194.2.17.0 194.2.236.0 194.20.12.0 194.20.40.0 194.20.41.0 194.20.45.0 194.20.6.0 194.206.126.0 194.206.137.0 194.206.228.0 194.206.91.0 194.21.56.0 194.218.187.0 194.219.163.0 194.22.0.0 194.22.107.0 194.224.52.0 194.224.53.0 194.23.141.0 194.23.86.0 194.23.92.0 194.231.76.0 194.235.58.0 194.235.8.0 194.236.202.0 194.236.211.0 194.236.232.0 194.236.60.0 194.236.87.0 194.237.63.0 194.242.165.0 194.242.166.0 194.244.56.0 194.25.10.0 194.25.133.0 194.250.1.0 194.250.152.0 194.250.2.0 194.250.252.0 194.250.5.0 194.250.50.0 194.251.240.0 194.251.241.0 194.251.242.0 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204.19.79.0 204.209.46.0 204.239.129.0 204.239.156.0 204.239.157.0 204.244.155.0 204.244.32.0 204.253.4.0 204.50.124.0 204.59.1.0 204.59.81.0 204.59.82.0 204.6.117.0 204.70.35.0 204.70.40.0 204.71.97.0 204.91.143.0 204.92.90.0 205.150.206.0 205.150.89.0 205.151.222.0 205.151.224.0 205.189.200.0 205.192.3.0 205.205.33.0 205.207.122.0 205.207.160.0 205.207.203.0 205.236.148.0 205.236.172.0 205.236.182.0 205.237.65.0 205.252.128.0 206.12.129.0 206.12.130.0 206.12.131.0 206.121.215.0 206.156.239.0 206.181.51.0 206.186.225.0 206.186.227.0 206.186.248.0 206.186.54.0 206.210.64.0 206.215.191.0 206.217.169.0 206.248.62.0 206.248.70.0 206.29.100.0 206.29.101.0 206.34.102.0 206.34.141.0 206.48.24.0 206.49.58.0 206.49.59.0 206.72.196.0 206.85.92.0 207.102.126.0 207.102.141.0 207.102.142.0 207.102.143.0 207.102.94.0 207.107.244.0 207.112.240.0 207.164.237.0 207.164.63.0 207.174.14.0 207.175.36.0 207.175.50.0 207.181.101.0 207.181.89.0 207.194.101.0 207.194.102.0 207.194.107.0 207.213.36.0 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209.91.128.0 210.208.232.0 210.209.7.0 210.64.123.0 210.64.98.0 210.65.13.0 210.65.231.0 210.67.33.0 210.67.40.0 210.68.182.0 210.68.85.0 212.29.0.0 62.156.145.0 62.20.26.0 62.20.27.0 62.52.64.0 62.52.65.0 62.52.66.0 97.3.0.0 97.5.2.0

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Two renumbering questions
by John R Levine 01 May '98

01 May '98

My ISP is changing upstreams for a variety of reasons around May 18th. 1. I have a /24 SWIPed to me, 205.238.207.0. The ARIN listing doesn't say it's non-portable, so can I take it with me? And if I do, how likely is it that the new ISP's announcement will get installed in backbone routers rather than filtered for being too long? It's right in the middle of the old upstream's block 205.238.192/18. 2. Assuming I have to renumber, I have a whole bunch of virtual domains all DNS served from one server in the renumbered space called ivan.iecc.com. (There's other servers elsewhere that won't get renumbered.) If I tell the Internic that ivan's host number has changed, will that update all the domains served from it? TIA. Regards, John Levine, johnl(a)iecc.com, Primary Perpetrator of "The Internet for Dummies", Information Superhighwayman wanna-be, http://iecc.com/johnl, Sewer Commissioner Finger for PGP key, f'print = 3A 5B D0 3F D9 A0 6A A4 2D AC 1E 9E A6 36 A3 47

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RE: Network Operators and smurf
by Doug Stanfield 01 May '98

01 May '98

Don't assume it's not needed for the 75xx, or anything else for that matter. Many networks are single connected to routers that are also acting multihomed to core providers and these boxes are being used. Doug Stanfield Oceanic Cable Data Networking Manager 200 Akamainui St. dougs(a)oceanic.com Mililani, HI 96789 Usially the low-end traffic is symmetrical. The problem is that CEF code and other anty-frauding realisations are appearing for the high-end routers, white they are nessesary for the low-end routers and useless for the core routers. For cisco, we need this future for 4500/4700/3640/2511 ASAP, 720x slightly, and don't need it for 75xx at all. On Sat, 25 Apr 1998, Al Reuben wrote: > Date: Sat, 25 Apr 1998 12:30:50 -0400 (EDT) > From: Al Reuben <alex(a)nac.net> > To: Havard.Eidnes(a)runit.sintef.no > Cc: jra(a)scfn.thpl.lib.fl.us, nanog(a)merit.edu > Subject: Re: Network Operators and smurf > > > > This should (naturally) be implemented where routing is symmetric > > and where a "reverse-path check" (looking up the source address in > > the routing table to find the "expected" incoming interface and > > checking whether the packet did indeed enter through that interface) > > The big question is, what do you do if most of your traffic _is_ > asymetrical? I mean, a more basic check could be, "Does the network that > this packet was sourced from exist *at all*?", or "Do I have a route back > to the source network through *any* interface?" > > That would cut down on a good amount of spoofing, like the idiots who > spoof from 1.1.1.1 etc. > > > Aleksei Roudnev, Network Operations Center, Relcom, Moscow (+7 095) 194-19-95 (Network Operations Center Hot Line),(+7 095) 239-10-10, N 13729 (pager) (+7 095) 196-72-12 (Support), (+7 095) 194-33-28 (Fax)

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RE: SMURF AMPLIFIER BLOCK LIST -- VERY LARGE!!!!!!!!!!!!!!!
by NOC 30 Apr '98

30 Apr '98

Erik, The script I wrote isn't really that smart... It just looks for two IP's within the same /24 that were sending some kind of ICMP packet to the victim machine. Since NetFlow logs don't break ICMP down to the type and codes, I had to unilaterally make that decision. If your network is clean, I sincerely apologize for any embarrassment or hassle this may have caused, and I will remove it from the list. Regards, Christian >-----Original Message----- >From: Erik Muller [SMTP:nc0773@corp.netcom.com] >Sent: Thursday, April 30, 1998 12:14 PM >To: Martin, Christian >Subject: Re: SMURF AMPLIFIER BLOCK LIST -- VERY LARGE!!!!!!!!!!!!!!! > > >> 163.179.230.0 > >This one's mine... the entire /24 is broken down as /30s, and .255 will >respond with nothing more sinister than an ICMP unreachable. Any details >on what results you saw that pointed to this network as an offender would >be appreciated (since I can't see any danger from it). > >---------------------------------------------------------------------------- >Erik Muller, Network Engineer emuller(a)noc.netcom.net >NETCOM Network Services Support NETCOM On-Line Communication Services > > >On Wed, 29 Apr 1998, Martin, Christian wrote: > >> All, >> >> Here is my contribution to the block list. The script that generated >> this will follow. It is 'public domain', in that it can be modified, >> BUT, please give credit where credit is due! >>

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RE: SMURF amplifier page
by Michael J. Freeman 30 Apr '98

30 Apr '98

stop the vanity. -----Original Message----- From: Jason Lixfeld [SMTP:jlixfeld@idirect.ca] Sent: Thursday, April 30, 1998 11:50 AM To: Jared Mauch Cc: Eric Germann; Karl Denninger; nanog(a)merit.edu Subject: Re: SMURF amplifier page Or, I particularly like this URL: http://if.you.on.this.list.youre.phucked.nether.net/smurf/ =) On Mon, 27 Apr 1998, Jared Mauch wrote: : You can take a look at : :http://puck.nether.net/smurf/ : : It's not filtered and copies the mcs page, graphics and all. : : - Jared : :On Mon, Apr 27, 1998 at 12:47:22PM -0400, Eric Germann wrote: :> Uhhh, is it just me, or does the below imply that if you are on the list, :> you can't read the page to find out :> :> a) you're on the list :> b) how to get off the list :> :> Kind of a catch-22 here, isn't it? :> :> :) :> :> Eric :> :> :> At 07:21 PM 4/26/98 -0500, Karl Denninger wrote: :> > :> >As promised, we now have a web page for this. :> > :> >The current smurf list is at http://www.mcs.net/smurf :> > :> >This will be updated roughly weekly, or whenever major changes are made :> >to the list of blocked networks. It contains, in addition to dialogue on :> >the Smurf issue, a list of network numbers and "whois" lookups on the :> >owners. :> > :> >IF YOU APPEAR ON THIS LIST YOU CANNOT TRANSPORT PACKETS INTO OUR :> >INFRASTRUCTURE. :> > :> >Instructions for what you must do to get the block removed are contained :> >within this page. Bitching and moaning is pointless - the only fix is :> >to FIX THE PROBLEM. :> > :> >Thank you! :> > :> >-- :> >-- :> >Karl Denninger (karl(a)MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin :> >http://www.mcs.net/ | T1's from $600 monthly / All Lines K56Flex/DOV :> > | NEW! Corporate ISDN Prices dropped by up to 50%! :> >Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS :> >Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost :> > : :-- : Work: jared(a)qual.net - We Make The Internet Work for Your Business : 9-5pm(ET) 800 637 4424x2634 - 24x7 NOC - 800 424 3223 : pgp key available via finger from jared(a)puck.nether.net : -- Regards, Jason A. Lixfeld jlixfeld(a)idirect.ca iDirect Network Operations jlixfeld(a)torontointernetxchange.net --------------------------------------------------------------------- TUCOWS Interactive Ltd. o/a | "A Different Kind of Internet Company" Internet Direct Canada Inc. | "FREE BANDWIDTH for Toronto Area IAPs" 5415 Dundas Street West | http://www.torontointernetxchange.net Suite 301, Toronto Ontario | (416) 236-5806 (T) M9B-1B5 CANADA | (416) 236-5804 (F) ---------------------------------------------------------------------

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