Quote:
Originally posted by CGI
I have a couple of servers at rackshack for doing TGP & MGP galleries -- 2 of them are down, 1 is intermittant and 1 is just fine. The only ports open on these are 22 and 80 (ssh and web) - not even FTP - so this is probably NOT related to the sendmail exploit (sendmail isn't even installed on any of the servers).
I just got off the phone with one of the rackshack support people and they can't give any ETA yet as to when stuff will be up, however the guy I spoke with was called into work a few hours early because they are now swamped lol. They also stated it was a network related issue wouldn't comment one way or the other if it was a denial of service attack.
Needless to say, 4 servers with round robin DNS and the ability to add and remove servers from the mix in under 90 seconds really helps 
Anyway, just thought I'd share what I know about it...
CGI
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Isn't that called "load balancing?"
Round-robin is the process of handing out a subsequent IP address to each person requesting your page. If the IP the DNS hands out doesn't work, the user still gets 404'd.
Load balancing redirects traffic to available servers with the least congestion.