Andre, cool tool! But I notice the prefix isn't always shown correct,
e.g. telia.se displays 193.44.172.0/15 lambdanet.de displays 80.86.170.0/19, but is located at 80.86.162.17 wrong numbers, wrong cidr...
Karsten
-----Original Message----- From: Andre Oppermann [mailto:oppermann@networx.ch] Sent: Monday, February 13, 2006 2:37 PM To: swinog@swinog.ch Subject: [swinog] ASNumber Extension for Firefox [LNC-Admin SPAM][bayes]
We've written a Firefox Extension that displays the AS Number of every website visited along with some additional interesting information. All data is updated daily and the prefix to AS number mapping is from a DFZ BGP feed.
You can download the extension here (a screenshot is available too):
http://www.asnumber.networx.ch
If you have any feedback, comments or feature requests please contact me either directly or at asnumber@networx.ch. We are working on providing a lot more information on the RIR IP address delegations but need fully access to all RIR's whois records for that. I've completed all paperwork last week and we should receive full access in the near future. Another thing I want to do is to show the number of RBL (Spamhaus, etc) listed IPs per AS.
BGP Experts, Traffic & Network Engineering Gurus
Andre Oppermann
Internet Business Solutions AG Hardstrasse 235 8005 Zürich Switzerland
Fon +41 44 277 75 75 Fax +41 44 277 75 77 Web www.networx.ch _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
Peering-Tech wrote:
Andre, cool tool! But I notice the prefix isn't always shown correct,
e.g. telia.se displays 193.44.172.0/15 lambdanet.de displays 80.86.170.0/19, but is located at 80.86.162.17 wrong numbers, wrong cidr...
Thanks for reporting this. There seems to be a off-by-one error under certain circumstances with the network address. We are using the LC-trie to do the lookups and it looks like we made a mistake somewhere. We're looking into it.
Andre Oppermann wrote:
Peering-Tech wrote:
Andre, cool tool! But I notice the prefix isn't always shown correct,
e.g. telia.se displays 193.44.172.0/15 lambdanet.de displays 80.86.170.0/19, but is located at 80.86.162.17 wrong numbers, wrong cidr...
Thanks for reporting this. There seems to be a off-by-one error under certain circumstances with the network address. We are using the LC-trie to do the lookups and it looks like we made a mistake somewhere. We're looking into it.
Ok, this problem is fixed. We had an error in the lookup server LC-trie where we didn't properly lop off all the bits of the netmask. This would happen only for certain specific bit patterns and mask combinations and it a property of how the information is compressed and stored in the LC-trie. No Firefox Extension update is required as this information is entirely server generated and the fix has been applied there.
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Andre Oppermann -
Peering-Tech