nanog mailing list archives
Re: Smurf Amp Nets
From: "Richard Thomas" <buglord () ex-pressnet com>
Date: Thu, 18 Jun 1998 13:09:05 -0400
-----Original Message----- From: Jon Lewis <jlewis () inorganic5 fdt net> To: Oystein Homelien <oystein () homelien no> Cc: Andrew Herdman <andrew () whine com>; nanog () merit net <nanog () merit net> Date: Wednesday, June 17, 1998 7:51 PM Subject: Re: Smurf Amp Nets
On Thu, 18 Jun 1998, Oystein Homelien wrote:You need to push the "probe=" parameter to the cgi as well. What you are doing above is merely looking up already-registered networks in the SAR database. Again, you are NOT probing the networks through the SAR by running the above lynx command! To do what you want, you must use URLs of this form: http://www.powertech.no/smurf/probe.cgi?network=1.2.3.4&probe=PROBEack! I somehow missed that when pasting the URL from Netscape into my editor. Here's an updated version. Chris Bongaarts <cab () tc umn edu> sent the 172.16/12 regex I was too lazy to include before. #!/usr/bin/perl while (<STDIN>) { ($net,$junk)=split /:/,$_,2; if (($net=~/\d+\.\d+.\d+/) &&
!($net=~/^(0\.)|(10\.)|(192\.168)|(172\.((1[6-9])|(2[0-9])|(3[01]))\.)|(255\ .255\.255)/)){
system("lynx -dump 'http://www.powertech.no/smurf/probe.cgi?network=$net&probe=PROBE'"); } elsif ($net=~/---/) { die "\ndone.\n"; } } I'm using this to make sure all the nets I recently posted about are registered. Based on the times reported by SAR, I think I'll be adding a bunch of new nets to it.
Might want to add a delay considering the amount of bandwidth they will be receiving if they tried to send out all those probes at once. In a previous message it was stated that a probe uses 4x64bytes, plus amplification by the broadcasts. I just took the SAR offline for about 4 minutes while trying running a SMALL portion of my bcasts through your script on my 28.8k modem, and it didn't even come close to completing that portion. That fact aside you won't get very accurate results if the SAR is so flooded it can't receive the replies. I would suggest they use ping -s 1 or -s 8 if the timing information is desired.
Current thread:
- Re: smurf amp nets, (continued)
- Re: smurf amp nets Craig A. Huegen (Jun 13)
- Re: smurf amp nets Michael Shields (Jun 13)
- Re: smurf amp nets Oystein Homelien (Jun 14)
- Message not available
- Re: smurf amp nets Eric McClelland (Jun 13)
- Re: smurf amp nets Oystein Homelien (Jun 15)
- Smurf Amp Nets Andrew Herdman (Jun 17)
- Re: Smurf Amp Nets Jon Lewis (Jun 17)
- Re: Smurf Amp Nets Oystein Homelien (Jun 18)
- Re: Smurf Amp Nets Jon Lewis (Jun 17)
- Re: Smurf Amp Nets Jon Lewis (Jun 17)
- RE: Smurf Amp Nets Morgan Sarges (Jun 18)
- Re: Smurf Amp Nets Jon Lewis (Jun 17)
- Re: Smurf Amp Nets Karl Denninger (Jun 19)
- Re: Smurf Amp Nets Craig A. Huegen (Jun 19)