Hi, Thanks for the quick reply. I have attached my config router settings behind the DNS server (10.10.2.10) ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname COLO_2 ! boot-start-marker boot-end-marker ! no logging console enable secret 5 $1$wPYg$AyyigqiQptspKno6pqKvC0 ! no aaa new-model memory-size iomem 5 ! ! ip cef ip host CORE 172.16.0.2 ip host COLO_1 172.16.1.2 ip host COLO_2 172.16.2.2 ip host ISP 172.16.0.1 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Tunnel0 description = GRE Tunnel To CORE = ip address 192.168.200.2 255.255.255.0 tunnel source 172.16.2.2 tunnel destination 172.16.0.2 ! interface Serial0/0 ip address 172.16.2.2 255.255.255.252 serial restart-delay 0 ! interface Serial0/1 no ip address shutdown serial restart-delay 0 ! interface Serial0/2 no ip address shutdown serial restart-delay 0 ! interface Serial0/3 no ip address shutdown serial restart-delay 0 ! interface Ethernet1/0 description = To COLO_2 LAN = ip address 10.10.2.1 255.255.255.0 half-duplex ! interface Ethernet1/1 no ip address shutdown half-duplex ! interface Ethernet1/2 no ip address shutdown half-duplex ! interface Ethernet1/3 no ip address shutdown half-duplex ! router eigrp 100 network 10.0.0.0 network 192.168.200.0 no auto-summary ! ip http server no ip http secure-server ip route 0.0.0.0 0.0.0.0 172.16.2.1 ! ! ! ! ! ! control-plane ! ! ! ! ! ! ! ! ! ! line con 0 line aux 0 line vty 0 4 password cisco login line vty 5 15 password cisco login ! ! end
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Hi, I have created a network topology by using GNS3, I have created a DNS server behind router 3600. All other work stations are also behind diffrent routers, with diffrent external addresses. No issues to ping external ip address of the DNS router from any where in the network, I'm pinging from the work stations and setup the correct DNS IP address. The DNS server is well setup, no issues with nslookup. The router has internal network address. The problem , I think I'm missing something in my router configuration (NAT, Port forwarding..) None of the worstations is doing resolve to the dns records on the DNS server. Any ideas ? Thanks In Advanced.
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