11-07-2010 05:33 AM
hi,
I have setup a site-to-site IPSec VPN between two cisco routers with Static public IPs. I notice that i can use hostnames instead IPs for cases with point-to-multipoint or Dynamic IPs. In that cases i can use this commands to setup VPN:
(config)#crypto isakmp identity hostname
(config)#crypto isakmp key XXXXX hostname "Remote_name"
(config-crypto-map)# set peer "Remote_name"
I also notice that i can use a cisco router as a DNS, and i can add host records with:
ip host "Remote_Name" "IP address"
Actually I want one router to work with Static Public IP ( Router_A ) and one with Dynamic Public IP (Router_B) from ISP. So maybe i can set Router with Static IP to work as DNS server. I know how DynDNS works with an account and software update client on a PC/server, but I've never used DNS hardware update clients and i don't know what steps i must follow to implement this.
Solved! Go to Solution.
11-08-2010 05:43 AM
Hi John,
The section in the link below should help you configure DDNS on your router:
(Refer to Http Update example)
http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html#wp1203580
This link shows an abstract conifg:
http://www.no-ip.com/support/guides/routers/using_cisco_routers_with_no-ip.html
For Dynamic to Static VPN refer to this link (this does not require DDNS):
http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a0080093f86.shtml
HTH
Regards,
Praveen
11-07-2010 11:30 AM
Hi,
You're correct.
Another option will be to configure a Static-to-dynamic IPsec L2L tunnel between both sites.
This will be a regular Site-to-Site configuration on the dynamic side and a client configuration on the static site.
Also using EzVPN will work as well.
Federico.
11-07-2010 01:01 PM
hi,
Can you give me more details about this ?
I known that i can set DNS IP with:
(Router_A)# ip name-server "DNS IP"
How do i set a (Static) Router to act as DNS Server ? How can i set a (Dynamic) Router to send hostname/IP updates to DNS server/Router ?
11-08-2010 05:26 AM
hi,
I found out how to set a router act as DNS server:
ip dns server
ip domain name "myDomain"
ip dns primary "myDomain" soa "Server IP or hostname" "postmaster e-mail"
ip host "hostname" "IP"
Now i'm missing only the part of DDNS updates from clients
11-08-2010 05:43 AM
Hi John,
The section in the link below should help you configure DDNS on your router:
(Refer to Http Update example)
http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html#wp1203580
This link shows an abstract conifg:
http://www.no-ip.com/support/guides/routers/using_cisco_routers_with_no-ip.html
For Dynamic to Static VPN refer to this link (this does not require DDNS):
http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a0080093f86.shtml
HTH
Regards,
Praveen
11-08-2010 07:29 AM
hi Praveen,
Great !! This was more than complete answer. I was looking to the internet, anything that has to do with DNS it's completely chaos. Especially the 3rd link was exactly all that i needed. Thanks to you now i have complete image of what is going on.
Thanks,
John
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