nanog mailing list archives
Re: large organization nameservers sending icmp packets to dns servers.
From: John Levine <johnl () iecc com>
Date: 6 Aug 2007 17:21:49 -0000
Sounds like one of the global-scale load balancers - when you do a (presumably) recursive DNS lookup of one of their hosts, they'll ping the nameserver from several locations and see which one gets an answer the fastest.
Why would they ping rather than just sending the query to all of the NS and see which one answers first? It's an IP round trip either way. I agree that pinging is harmless, but for this application it seems pointless, too. R's, John
Current thread:
- large organization nameservers sending icmp packets to dns servers. Drew Weaver (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Valdis . Kletnieks (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Steven M. Bellovin (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. John Levine (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Valdis . Kletnieks (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. John L (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Patrick W. Gilmore (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Chris L. Morrow (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Peter Dambier (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Joe Abley (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Steven M. Bellovin (Aug 06)
- Re: large organization nameservers sending icmp packets to dns servers. Valdis . Kletnieks (Aug 06)
- RE: large organization nameservers sending icmp packets to dns servers. Jason J. W. Williams (Aug 07)
- RE: large organization nameservers sending icmp packets to dns servers. Donald Stahl (Aug 07)
- Re: large organization nameservers sending icmp packets to dns servers. Patrick W. Gilmore (Aug 07)
- Re: large organization nameservers sending icmp packets to dns servers. Joe Abley (Aug 07)