Odd problem with DNS and IP change.

Derek Ragona derek at computinginnovations.com
Sun Mar 1 01:08:11 PST 2009

At 09:40 AM 2/28/2009, Andrei Brezan wrote:
>Hello list,
>         I have a strange problem and I don't know what to relate it to. 
> My ISP
>changed my IP from (eg) to I have changed my zone
>files to reflect that change.
>"dig -t mx domain.com" results in mail.domain.com 3600 IN A
>(the new ip). However when i try:
>"ping mail.domain.com" it tries to get to the old ip and gets
>time to live exceeded fro an ip along the route. When i try to ping
>domain.com it gets all ok as it pings the new ip. I've also tried dig
>@(forwarders in named.conf) and they to got the correct mx dns entry for
>         In rc.conf i have hostname="mail.domain.com" (eg), i haven't changed
>it, i'm thinking it's something related to hostid or hostuid but i don't
>know where to search for this topic.
>         If anyone has a clue what to try or where to look upon this behavior
>please shed some light.
>Thank you.

Check /etc/hosts which is used before DNS.


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