Cheap IP takeover

Monday, 7 April 2003, 4:59 PM EST

Directing traffic to one of several machines is fairly straightforward when using round-robin DNS. But what happens when one of those servers becomes unavailable? Here's one scheme for monitoring the health of another server, and standing in for it if it fails.

First, we need to make a distinction between the server's "real" IP address, and the IP (or IPs) from which it actually serves public content. For this example, we'll be referring to two servers, Pinky and Brain. Pinky uses the IP address 208.201.239.12 for its "real" IP on eth0, and also has an IP alias of 208.201.239.36 on eth0:0. Brain uses 208.201.239.13 on eth0, and 208.201.239.37 on eth0:0.

[ Read more ]




Spotlight

Patching: The least understood line of defense

Posted on 29 August 2014.  |  How many end users, indeed how many IT pros, truly get patching? Sure, many of us see Windows install updates when we shut down our PC and think all is well. Itís not.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Tue, Sep 2nd
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //