Cisco IOS Router 837 - Configure DDNS / Dynamic DNS
I have an Internet link, connected to my Cisco Router. The package I subscribed for comes with a dynamic IP Address. I was told, if I need to remote access into the Cisco Router, I need to enable the DDNS feature. Can this be done on a Cisco Router? I was informed this feature isn't supported. Please help me
I've been told that DynDNS now requires credit card, as it's no longer FREE. Please use www.no-ip.com instead. Shown below is a sample working configuration;
! version 12.4 service nagle no service pad service tcp-keepalives-in service tcp-keepalives-out service timestamps debug datetime msec localtime service timestamps log datetime msec localtime service password-encryption service sequence-numbers ! hostname R1 ! enable password cisco ! ip domain name no-ip.org ip name-server 184.108.40.206 ip ddns update method ddns-noip1 HTTP add http://lifeisgreat2014:firstname.lastname@example.org/nic/update?hostname=<h> interval minimum 0 0 1 0 interval maximum 1 0 0 0 ! interface FastEthernet0/0 description ### Facing ISP ( WAN) ### ip ddns update hostname r1.no-ip.org ip ddns update ddns-noip1 ip address negotiate ! interface FastEthernet0/1 description ### LAN ### ip address 10.151.100.1 255.255.255.0 ! no ip http server no ip http secure-server ip dns server ! control-plane ! line con 0 line aux 0 line vty 0 4 ! scheduler allocate 20000 1000 ntp clock-period 17179773 ntp server 220.127.116.11 ntp server 18.104.22.168 ntp server 22.214.171.124 prefer ! end
Note: If your WAN facing interface is getting a dynamic Public IP from the ISP, then you should add the <a> as shown below.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...