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vermontcomputing

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Server works on one ISP but not the other

I really need some advice here.

I have set up one of my customers with a Linksys RV042 router which provides dual wan support. Wan1 is new, cable internet. Works great. Wan2 is a frac t1. Works poorly, but works. With both of them connected and defaulting to the cable, everyone can get online... except the server. DNS functions, it will even receive email, but it cannot send email or any other traffic. If I disconnect the wan1 line, so it fails over to wan2, the original ISP, everyone works fine.

So... where in this server is something hard-set to only work with this ISP?

Thanks!
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plug1
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The only thing that can be causing this is the DNS server forwarders, first check your tcptip settings on the server, it should be looking to itself for DNS (assuming its the dns server). Then check your DNS server properties, look at the forwarders, I assume they are looking to the older ISPs DNS servers. Im also guessing your client Pc's are taking DHCP with the new ISP's dns servers or have them forced in as opposed to DHCP.
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vermontcomputing

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that's what I thought! Lo, it isn't the case.

I have tried different DNS servers, including servers from both ISPs and even servers from the OpenDNS project, which have always served me well.

i found some posts earlier related to RRAS, and have since turned that off, which was causing an ARP cache error when i tried to repair the connection.
when the server isnt working and the clients are, ping from the server the following ip address 194.112.32.1

does that work?

Then ping www.youtube.com

Does that work?

Thank you for your willingness to help - I forgot to say that before.

I pinged both addresses, and was able to, with only WAN2 connected.
With WAN1 connected, youtube's address was resolved, but no packets returned. the ip you gave me did not return data either. however, i get primarily "Request timed out," but also a few "10.0.0.2 [router] Destination Host Unreachable"
Ok mate, then in that case you seem to have a route problem on the server

do a "route print" on the server, post it here

Do the same on a client, post it here, we'll compare and contrast.
Sorry do an IPconfig /all on both as well.
From the client: (my laptop)

===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x10003 ...00 13 ce 6a 0e 94 ...... Intel(R) PRO/Wireless 2200BG Network Connection - Intel Wireless Connection Agent Miniport
0x30004 ...00 c0 9f fa 76 55 ...... Realtek RTL8139/810x Family Fast Ethernet NIC
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.2       10.0.0.50        20
         10.0.0.0    255.255.255.0        10.0.0.50       10.0.0.50        20
        10.0.0.50  255.255.255.255        127.0.0.1       127.0.0.1        20
   10.255.255.255  255.255.255.255        10.0.0.50       10.0.0.50        20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1        1
      169.254.0.0      255.255.0.0        10.0.0.50       10.0.0.50        30
        224.0.0.0        240.0.0.0        10.0.0.50       10.0.0.50        20
  255.255.255.255  255.255.255.255        10.0.0.50       10.0.0.50        1
  255.255.255.255  255.255.255.255        10.0.0.50           10003        1
Default Gateway:          10.0.0.2
===========================================================================
Persistent Routes:
  None



Windows IP Configuration



        Host Name . . . . . . . . . . . . : Hostname

        Primary Dns Suffix  . . . . . . . :

        Node Type . . . . . . . . . . . . : Hybrid

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

        WINS Proxy Enabled. . . . . . . . : No



Ethernet adapter Wireless Network Connection:



        Media State . . . . . . . . . . . : Media disconnected

        Description . . . . . . . . . . . : Intel(R) PRO/Wireless 2200BG Network Connection

        Physical Address. . . . . . . . . : 00-13-CE-6A-0E-94



Ethernet adapter Local Area Connection:



        Connection-specific DNS Suffix  . :

        Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC

        Physical Address. . . . . . . . . : 00-C0-9F-FA-76-55

        Dhcp Enabled. . . . . . . . . . . : No

        IP Address. . . . . . . . . . . . : 10.0.0.50

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

        Default Gateway . . . . . . . . . : 10.0.0.2

        DNS Servers . . . . . . . . . . . : 10.0.0.2
*********************************************
From the server


IPv4 Route Table
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x10003 ...00 14 5e 1f 10 6f ...... Broadcom NetXtreme Gigabit Ethernet #2
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.2         10.0.0.1      1
         10.0.0.0    255.255.255.0         10.0.0.1         10.0.0.1      1
         10.0.0.1  255.255.255.255        127.0.0.1        127.0.0.1      1
   10.255.255.255  255.255.255.255         10.0.0.1         10.0.0.1      1
        127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1      1
        224.0.0.0        240.0.0.0         10.0.0.1         10.0.0.1      1
  255.255.255.255  255.255.255.255         10.0.0.1         10.0.0.1      1
Default Gateway:          10.0.0.2
===========================================================================
Persistent Routes:
  None


Windows IP Configuration



   Host Name . . . . . . . . . . . . : hostname

   Primary Dns Suffix  . . . . . . . : BMI.local

   Node Type . . . . . . . . . . . . : Hybrid

   IP Routing Enabled. . . . . . . . : No

   WINS Proxy Enabled. . . . . . . . : No

   DNS Suffix Search List. . . . . . : BMI.local



Ethernet adapter Local Area Connection 2:



   Connection-specific DNS Suffix  . :

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

   Physical Address. . . . . . . . . : 00-14-5E-1F-10-6F

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

   IP Address. . . . . . . . . . . . : 10.0.0.1

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

   Default Gateway . . . . . . . . . : 10.0.0.2

   DNS Servers . . . . . . . . . . . : 10.0.0.1

   Primary WINS Server . . . . . . . : 10.0.0.1



OK your DNS forwarder on the DNS server should be 10.0.0.2, that way the router will forward the dns requests to the correct sites. Your current dns forwarders must be set to a certain ISP old or new.

Your quickest way to take the dns server out of the equation is to set the dns server to be the router 10.0.0.2. The server will then work.

This is the wrong setup though so check your forwards, change to the router but also your clients should be using the server as the dns server not the router or they are going to have problems with activedirectory and all manner of other issues.
I've tried having the Router be the sole DNS forwarder on the server... and it didn't change anything.

and i certainly understand that the configuration is bad. I inherited this client and AD IS really bad. i am making progress, though.

so... other ideas?
Your DNS must be screwed then mate, Id remove and reinstall.

I take it you have tried my suggestion to prove the DNS is at fault?

Once the DNS is sorted everything else will fall into place.

Id uninstall the DNS server component. set the servers DNS to be the router, prove that its working with both connections. Once your happy with that reinstall DNS server, reconfigure, add the forwarder and test.

If it still fails run netdiag.exe /fix then netdiag.exe and check for errors.
Unfortunately, that didn't work.

I removed DNS, pointed the server DNS to the router... and nothing changed.

I have to leave now, but I have remote access to the unit. I will be able to come back in a few days, hopefully with some things to try. Your help is greatly appreciated, and I will be checking messages later today.

Jeremy
If your pointing the dns to the router and its still not working Id restart the server and try again or do an IPconfig /flushdns and try again.

Somethings not right  (seriously) if that doesnt work.
i did reboot the server... didn't work. I didn't force a dns flush... that i remember (I tried a lot of stuff!) but i did the generic "repar" command, which (I thought) included that. maybe not?

i am headed back there thursday am. hopefully a day in between will generate some ideas and a clearer mind. thanks for your help thus far.
The repair command should have sorted that tbh. Something really isnt doing as it should on that server, I'd consider upgrading the network card river if there is an updated one available.
it makes me feel better when I am stumped like this and the suggestions I get are things that I've tried. LOL. Nope, no new NIC driver that I could find. I didn't look *that* hard though.
Is replacing the Nic an option? wont cost much and rules it out anyway..
I was completely prepared to do that today, however I found a fresh day to be the answer - while I have a solid understanding of Windows and Windows server, which is where I *thought* the problem lay, it was, in fact, with the router.

I copied all of the settings from the old router, which included a bunch of NAT stuff. I'm not so good when we get beyond the basic SoHo routers, and didn't really know why this stuff was there, but figure it needed to be...

I'm sure you can see where I'm going now. The router was running NAT but only for the one particular WAN interface. I removed the entry and now all is good. I thank you so much for your efforts.
Glad its fixed.. still doesnt explain why your laptop worked through it but who cares.
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