zones – Internetblog.org.uk https://www.internetblog.org.uk Web hosting, Domain names, Dedicated servers Fri, 29 Jan 2016 11:05:52 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.5 https://www.internetblog.org.uk/files/2016/01/cropped-favico-32x32.png zones – Internetblog.org.uk https://www.internetblog.org.uk 32 32 The nsupdate for dynamic DNS https://www.internetblog.org.uk/post/1086/the-nsupdate-for-dynamic-dns/ Thu, 11 Mar 2010 18:24:29 +0000 http://www.internetblog.org.uk/post/1086/the-nsupdate-for-dynamic-dns/ Mac connection settings
Computer users with dynamic IP addresses often have to contend with the reality that their internet identity can literally change without warning. For average Internet use, this is not a problem, but if you ever need to host something from home (even a private server that only gives you password access), you will need some support for dynamic DNS.

Dynamic DNS notifies the user’s domain that the IP address has been changed and needs to be updated. When someone remotely connects to the domain, they will get the right computer, even if the IP address changes regularly. The Linux command called nsupdate is a utility that allows the user to update a DNS zone without having to manually edit the zone file.

“nsupdate is a fantastic little utility that enable quick and secure DNS zone updates. Setup is quick and painless, and use is fairly intuitive for anyone remotely familiar with DNS, and skilled enough to admin their own Linux system.”

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Photo Source: Flickr

]]> How to disable dynamic updates in BIND DNS https://www.internetblog.org.uk/post/837/how-to-disable-dynamic-updates-in-bind-dns/ Wed, 30 Dec 2009 19:12:27 +0000 http://www.internetblog.org.uk/post/837/how-to-disable-dynamic-updates-in-bind-dns/ DNS zone edit
BIND (also called NameD) is the DNS system for most Unix-like and Linux networked servers. It controls all of the DNS functionality on those servers and thus needs to be secure. Dynamic updates allow remote servers to add, delete, or modify zone entries in DNS records. While there may be situations where this is necessary, it is better to disable it if you do not need it.

If you decide you need it, you can find more information about making it secure at Crypt.Gen.NZ. To disable dynamic updates, edit the named.conf file and edit each domain zone, setting “allow-update” to “note”

zone "globberific.net" IN {
....
allow-update { none; };
...
}

That is all it takes, although it is probably wise to do this before you end up with a lot of entries and have to go through each one and painstakingly remove all dynamic updates. Regardless, getting it done will give you a little more peace of mind.

Source: nixCraft
Photo: Flickr

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