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What is reverse DNS?

Traceroute an IP and the last entry gives me the host the IP resolved to. How do I change that?

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marked as duplicate by EEAA, MikeyB, John Gardeniers, Bart De Vos, voretaq7 Aug 13 '12 at 15:30

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Is it LAN or WAN IP? Do you have control of? –  quanta Aug 13 '12 at 3:59
    
Simple, just traceroute a different IP address. –  John Gardeniers Aug 13 '12 at 5:20

2 Answers 2

You need to change the PTR record for that IP. If this is an RFC1918 IP block or is a net block allocated or SWIPed to you, then you can do this yourself. If not, then you'll need to contact your ISP or whomever owns that netblock.

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I just learned this after posting the question. I have some servers with SoftLayer.com and I see they have an option to update my RDNS. I looked it up and that's exactly it! Thanks again! –  Aco Strkalj Aug 13 '12 at 4:02

You change the result of the reverse lookup by changing the PTR record in the reverse lookup zone - the owner of the IP range controls where that record's delegated to.

If you have access to the in-addr.arpa zone for that IP range, then change it there. If you don't, ask your ISP.

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