Use your Cisco router as a primary DNS server
In IOS release 12.3, most Cisco routers can act as primary DNS servers (formerly, this functionality was only available as part of DistributedDirector product), alleviating the need for a host-based DNS server in your perimeter network. To configure a router to act as primary
DNS server for a zone, use the ip dns primary command, for example:
Next, you need to define primary and secondary name servers for the domain.ip dns server
ip dns primary website.com soa ns.website.com
admin@website.com 86400 3600 1209600 86400
Use the ip host ns command:
ip host website.com ns ns.website.comYou can also define mail routing for the domain with the ip host mx command:
ip host website.com ns ns.isp.com
ip host website.com mx 10 mail.website.com
ip host website.com mx 20 mail.isp.com
Finally, you need to define hosts within your domain (with the traditional form of the ip host command):
ip host ns.website.com 192.168.0.1 ! router's IP address
ip host www.website.com 192.168.1.1
ip host website.com 192.168.1.1 ! alternate for www.website.com
ip host mail.website.com 192.168.1.2
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6 comments:
This actually caused my 2620XM to run at 98% CPU utilization and stopped my CME from processing calls.
You're absolutely right. I wrote a few recommendations on how to protect your router.
Whether probably to achieve support DDNS+DHCP of clients on the described configuration?
I was not able to get DDNS server working on Cisco IOS. It can send the DDNS requests to an external server, but somehow cannot keep a DDNS cache internally (if that was the question).
Great thanks!
Where I could read about why I can confihure ddns update via Cisco DHCP server and named/bind daemon?
This has worked perfectly on my Cisco 2800, 2600, 1800 and 1700 series routers. I suggest one read Cisco's documentation regarding dynamic name resolution. For example, ip domain list and ip domain name are also required.
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