I want to specify a domain name in rules
but the domain name often changes IP
Is there anything I can do about it?


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On Wed, Feb 25, 2009 at 07:28:35PM -0500, Long Wind wrote:
> I want to specify a domain name in rules
> but the domain name often changes IP
> Is there anything I can do about it?
cron is your friend ?

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On Wednesday 25 February 2009 19:28:35 Long Wind wrote:
> I want to specify a domain name in rules
> but the domain name often changes IP
> Is there anything I can do about it?

Can you meet your need with tcpwrappers?
They work quite well with domain names, and if you're
trying to selectively allow a particular service,
are probably the right choice.

Check the man-pages of /etc/hosts.allow and /etc/hosts.deny
for details.

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Thanks to those who reply!

Gmail has changed! it combine many mails into one. I am confused. I am mad.


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On Wed, Feb 25, 2009 at 07:28:35PM -0500, Long Wind wrote:
> I want to specify a domain name in rules but the domain name often
> changes IP Is there anything I can do about it?
>

Cronjob, every four hours or so gets the current IP of the domain. Then,
in iptables, do something like

iptables -arg rule -ip $(cat /file/you/stored/ip/in)

Note: this is an ugly workaround, so if you need to do this for more
than one domain you may want to find another method.

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