We have a Cisco 2600 router and a 515 PIX. Below is the configuration for the router on the 10.0.0.0 network:
memory-size iomem 30
clock timezone PST8PDT -8
ip subnet-zero
ip cef
no ip domain-lookup
ip host butler 10.0.0.12 (***THIS Server died and was replaced with 10.0.0.7 Windows 2003 DNS server***).
ip domain-name ourcompany.com
!
!
controller T1 1/0
!
controller T1 2/0
!
!
!
!
!
interface FastEthernet0/0
description *** main 10.0.0.0 subnet ***
ip address 10.0.0.1 255.255.255.0
no ip redirects
duplex auto
speed auto
DNS was never properly configured on the network. Currently I can ping yahoo.com from a Windows command prompt, but it only returns the following:
c:\>ping yahoo.com
Pinging yahoo.com [66.94.234.13] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 66.94.234.13:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss)
Note that I can browse to yahoo.com without issue, but do not receive replies from command prompt.
Nslookup from command prompt returns the following:
c:\>nslookup yahoo.com
Server: UnKnown
Address: 10.0.0.7:53
Non-authoritative answer:
Name: yahoo.com.ourcompany.com
Address: 208.67.219.137
I changed the DNS on our DHCP server to use the OpenDNS addresses 208.67.222.222 and 208.67.220.220. This enabled me to at least get a response from Nslookup, but even after performing an ipconfig/release and renew from a DHCP computer, it still defaults to the old DNS setting of 10.0.0.7
c:\>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Computername
Primary Dns Suffix . . . . . . . : OURDOMAIN
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : OURDOMAIN
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : issaonline.com
Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controll
r
Physical Address. . . . . . . . . : 00-1A-A0-A7-E6-D9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 10.0.0.151(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, September 24, 2007 4:02:05 PM
Lease Expires . . . . . . . . . . : Tuesday, October 09, 2007 4:02:30 PM
Default Gateway . . . . . . . . . : 10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.7
DNS Servers . . . . . . . . . . . : 10.0.0.7
208.67.222.222
208.67.220.220
Primary WINS Server . . . . . . . : 10.0.0.7
NetBIOS over Tcpip. . . . . . . . : Enabled
c:\>
What I'm trying to accomplish is to get DNS configured properly. Again, when I ping external websites by name, the ip resolves correctly, but no replies with ping. When I ping our internal websites, they correctly resolve and reply with the internal ip:
c:\>ping internalwebsite.com
Pinging internalwebsite.com [10.0.2.184] with 32 bytes of data:
Reply from 10.0.2.184: bytes=32 time<1ms TTL=127
Reply from 10.0.2.184: bytes=32 time<1ms TTL=127
Reply from 10.0.2.184: bytes=32 time<1ms TTL=127
Reply from 10.0.2.184: bytes=32 time<1ms TTL=127
Ping statistics for 10.0.2.184:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
c:\>
Have a few more questions than this, but have to run for now. Thanks for any input, as other articles I saw out there didn't quite address it. If you have tips for configuring DNS on a 2003 domain controller, that'd be great, as well. Basically I need DC for our LAN and internal DNS and forwarders for the external websites (google.com, etc). I have a start on it, but there's definitely some things missing.
