ISP change = problem with internal DNS !?

[barret bonden]

A 2 NIC SBS server, going up to a firewall then to a Cisco 800 then to
Cablevison - all was well. Changed over to a t1 (don't' ask me why; I
advised against it ) and we get DNS problems on the SBS box (!) ; some
websites load, others don't.

The only changes I made were to the external address used by the Firebox
firewall- it now points to a new Cisco box from the T1 people,
Broadviewnet.net.

We get lots of : "The DNS server encountered a packet addressed to itself
on IP address 192.168.1.120. The packet is for the DNS name
"ns2.ixwebhosting.com.". The packet will be discarded. This condition
usually indicates a configuration error."

The forwarders list in the DNS is fine, ditto the other issues MS help
suggests.

The SBS server is doing routing, and it all looks good.

Ipconfig on the server shows:

Host Name . . . . . . . . . . . . :xxxxxx

Primary Dns Suffix . . . . . . . : xxxxxx.local

Node Type . . . . . . . . . . . . : Unknown

IP Routing Enabled. . . . . . . . : Yes

WINS Proxy Enabled. . . . . . . . : Yes

DNS Suffix Search List. . . . . . : xxxxxx.local

Ethernet adapter Network Connection:

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
#2

Physical Address. . . . . . . . . : 00-18-8B-xxxxxxxx

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

IP Address. . . . . . . . . . . . : 192.168.111.2

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.111.1

DHCP Server . . . . . . . . . . . : 192.168.111.1

DNS Servers . . . . . . . . . . . : 167.206.112.xxx

NetBIOS over Tcpip. . . . . . . . : Disabled

Lease Obtained. . . . . . . . . . : Monday, January 14, 2008 2:28:50 PM

Lease Expires . . . . . . . . . . : Monday, January 14, 2008 3:28:50 PM

Ethernet adapter Server Local Area Connection:

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet

Physical Address. . . . . . . . . : 00-10-18-19-AC-77

DHCP Enabled. . . . . . . . . . . : No

IP Address. . . . . . . . . . . . : 192.168.1.120

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . :

DNS Servers . . . . . . . . . . . : 192.168.1.120

Primary WINS Server . . . . . . . : 192.168.1.120

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
#3

Physical Address. . . . . . . . . : 00-10-18-1C-9A-B5

DHCP Enabled. . . . . . . . . . . : No

IP Address. . . . . . . . . . . . : 192.168.1.121

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . :

DNS Servers . . . . . . . . . . . : 192.168.1

[Kevin D. Goodknecht Sr. [MVP]]

Read inline please.

In news:4790fb49$0$11566$607e...@cv.net,
barret bonden <sup...@networks-cc.com> typed:

> We get lots of : "The DNS server encountered a packet addressed to
> itself on IP address 192.168.1.120. The packet is for the DNS name
> "ns2.ixwebhosting.com.". The packet will be discarded. This condition
> usually indicates a configuration error."

There must be a significance of the name "ns2.ixwebhosting.com." to you, it
is apparent to me that you have a stub zone or delegation with this name
server in it, and when your DNS tries to use it, the packet comes right back
to you. It is also possible that this name is in your Root Hints list, and
it is resolved to 192.168.1.120.

On a side note-
You said this server has 2 NICs, but the ipconfig /all lists three, and two
are on the same subnet, both with NetBIOS enabled. This can really mess up
routing and NetBIOS resolution. If you have two NICs connected to the same
physical Network, they should be on different IP subnets, or they should be
Teamed. Otherwise, disconnect and disable one of those NICs.

> Ethernet adapter Server Local Area Connection:
>
>
>
> Connection-specific DNS Suffix . :
>
> Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit
> Ethernet
>
> Physical Address. . . . . . . . . : 00-10-18-19-AC-77
>
> DHCP Enabled. . . . . . . . . . . : No
>
> IP Address. . . . . . . . . . . . : 192.168.1.120
>
> Subnet Mask . . . . . . . . . . . : 255.255.255.0
>
> Default Gateway . . . . . . . . . :
>
> DNS Servers . . . . . . . . . . . : 192.168.1.120
>
> Primary WINS Server . . . . . . . : 192.168.1.120
>
>
>
> Ethernet adapter Local Area Connection:
>
>
>
> Connection-specific DNS Suffix . :
>
> Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit
> Ethernet #3
>
> Physical Address. . . . . . . . . : 00-10-18-1C-9A-B5
>
> DHCP Enabled. . . . . . . . . . . : No
>
> IP Address. . . . . . . . . . . . : 192.168.1.121
>
> Subnet Mask . . . . . . . . . . . : 255.255.255.0
>
> Default Gateway . . . . . . . . . :
>
> DNS Servers . . . . . . . . . . . : 192.168.1

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

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[barret bonden]

Solved - 1) root hints needed to be reloaded and 2) needed to update
"forwarders" with new ISP's DNS .

"barret bonden" <sup...@networks-cc.com> wrote in message
news:4790fb49$0$11566$607e...@cv.net...