_SERIOUS_ DNS malfunction

I suddently have a serious connection problem in Mac OS X. I've been connecting through Airport for a while now, but now I've moved for the summer and in the new residence I'm connecting through ethernet.
For some reason Mac OS refuses to connect to/ping ANY domain name at all. I get response from all kinds of IPs, including the DNS servers I'm supposed to use (which belongs to the ISP, not a local DNS).
First I thought it was the firewall blocking the incoming packets or something, but it works fine in Windows on the same computer.
Also tried using nslookup, which finds the domain in the GRAPHICAL interface (Networking tools/Nslookup), but not when trying nslookup in the terminal.
I've found no answer to this at all and I find it totaly unacceptable to reinstall the system just because of this. Any suggestions? Can I reset all network settings in some way?
Macbook Pro 2,16GHz Mac OS X (10.4.8) Bootcamp + Windows XP

Hi
first of I would try flushing yoru dns cache
open your terminal and use the command
sudo lookupd -flushcache
If that does not work try using someone elses dns servers to see if they work.
Do you have your isp's dns servers in your network preferences or do you have your router's IP as your dns server?

Similar Messages

DNS records not always updating / up to date / correct

Hi
We have a local domain with a primary DC running Windows Server 2008 R2 along with DHCP and DNS (AD integrated), and a secondary backup DC running Windows Server 2008 (non-R2), however it has been off for a very long time due to malfunctioning
hardware. We also have another domain on the same LAN in a different forest altogether which has a trust set up between these two domains. This other domain has a Windows Server 2008 R2 as the primary DC and utilizes the first mentioned DC for DHCP
as well. The LAN has physical Ethernet connectivity and WiFi as there are mostly laptops as workstations. DCHP leases are set to 24 hours and DNS Aging and Savaging is configured for both domains.
I have been troubled by an issue for some time now where in some cases there is a mismatch with the IP a laptop has and what DNS has captured. I tried to reproduce the issue but I am unable to do so: I would connect a laptop via cable, then switch
to WiFi and then back again, each time DNS gets updated accordingly. I have tried the same tests with both connected simultaneously while switching between them as well.
What is curious is that I experience this intermitted issue in both DNS forward lookup zones for the respective domains. Keep in mind as I said previously that these are completely separate domains from different forests with a trust
configured between them. Other than the trust which they have in common, the DHCP is also in common which makes me suspect the issue is related to it. I have configured the IPv4 DCHP setting: "Always dynamically update DNS A and PTR records"
and ensured credentials were set which will be used to register and update records on behalf of clients.
This issue is causing problems with internet access through our hardware firewall as the sessions are dependant on the accuracy of DNS. Please, could anyone try and assist me. Thank you in advance.

I have made an interesting discovery. At one point yesterday client was connected to both cable and wifi which means DCHP had 2 leases for each adapter respectively. Later in the day wifi was completely turned off though a physical toggle switch on the
machine and only plugged in via cable. Further in the day I had the user complain that there is no internet connectivity (remember I said our firewall is dependant on the DNS' accurancy). Upon inspection I found that DNS had the IP of the wifi adapter and
not the one from cable, yet the wifi adapter is turned off completely for a couple of hours. I ran ipconfig /registerdns which corrected the A record, however only for about an hour after which the wifi IP overwrote the record again. I ended up deleting
the wifi adapter's DHCP lease late in the afternoon after which we all left for the day not too long thereafter. In the morning I had the same complaint of no internet access to again find that the cable IP is not reflecting in DNS for the client's A record
and now found a completely new IP which it did not have before, yet according to DCHP, the MAC address matched the wifi adapter. When I checked, the wifi adapter was still completely off. Somehow someway the record keeps on being overwritten by something (suspect
DHCP), even if the other adapter is completely turned off?!

2008 MBP DNS issues Wifi and DPC3825

We are visiting a beach house and have about a dozen iDevices that all connect sucessfully via WiFi to Mediacom broadband via a Cisco DPC3825 cable modem. Only a 2008 MPB with 10.8.2 will not resolve DNS lookups.
A 2011 MBA also with 10.8.2 works fine. The MBP is configured with the exact same DNS servers. The MBP gets an IP address and I can ping any IP address but Lookup fails using the network utility. I can get an IP address on the MBA and surf it directly by entering it into Safari on the malfunctioning MBP. I tried changing the DNS server to 8.8.8.8 but no joy. Also have flushed the DNS cache. This is the strangest Mac networking problem I have seen in some time. Anyone have any suggestions?
Thanks

Nothing is blocking his traffic. The fact that ping works by IP and not by name indicates that DNS client service is not working properly on the Mac in question. I bet that's your problem. Unfortunately, I don't know how to tell you to fix that, but that's probably the best place to start looking. If this was a Windows machine, I'd have you check the winsock stack and do a reset as well as check to make sure DNS Client was started as a service. **** if I know where in OSX this functionality is. That's what ***** about OSX... they don't give you a lot of control over stuff like this and when it breaks, it's not easy to fix or even check if things are working since everything is via plists and damons, etc.
I would check in Activity Monitor if mDNSResponder is listed as a process. If it isn't, then that's your issue.

Noise issue + DNS Reset request

Below is a link to a screeshot demonstring ADSL stats and uptime for my router/modem
http://clip2net.com/s/3iwOLT1
Internet speed and noise increased roughly two weeks ago following a malfunctioning microfilter - that has subsequently been replaced.
I have read on other posts that following an unstable connection an automated BT system attenuates bandwidth in response ,reducing speed.
I have also read that after 3-5 days of a stable connection the same system will attempt to reverse these precautions in 3DB intervals. And that if this fails to take place I either have an issue with my line (which is extremely unlikely considering the circumstances) and that I should contact a forum moderator in order to process a DNS reset request.
If my research/assumptions are correct I am happy to supply any info further required.
Otherwise I appreciate any advice in advance.
-J.Shelley
P.s I have performed these same tests on the main phone connection with similar results indicating extension wiring is functioning fine.
Solved!
Go to Solution.

you cannot get a DNS reset you mean a noise margin reset
this is your problem
Due to all the disconnections / restarts of your hub you are now in a banded profile you need to maintain a stable connection for 3/5 days and you will start to lift out of the banding automatically
http://www.plus.net/support/broadband/speed_guide/broadband_terminology.shtml
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WRT54G, no internet, internal ping and traceroute do function - DNS error?

With my laptop I have wireless (or wired, makes no difference) connection with my WRT54G-router (192.168.1.1.).
This is connected with a Motorola-cable-modem.
The laptop has an internal IP-adress, 192.168.1.102. On the laptop I have no internet-connection.
The router has an external IP-adres. Pinging from my laptop results in a time-out. Pingin direct from the router (diagnostics) goes well!!
So, what's going on? How is it possible that external devices can not resolve DNS-records and direct from within the router pinging goes OK? Connecting the laptop directly to the modem is OK, I have internet connection. My other devices, 2 internet-radios and a WII neither have internet-connection, so the problem is not related to the laptop.
No change in DNS-records. DNS-servers are automatic assigned.
Can anybody help me? Regards, Roger

Thanks for your answer.
I've reset the router, adjusted the settings. No internet-connection, same problem.
I added the DNS-record for a open-source DNS and see, then I can surf the internet. Strange, seems that the router can't work with the DNS-records the ISP is giving to my router. Although they work fine when I connect my laptop directly to my modem.
My internetradio's also function properly now.
I still want to know what's going on. The router doesn't work as he should be, he can't work with the obtained DNS-adresses.
Any idea what's he malfunctioning?

Open DNS follow-up report

Interestingly, after a very positive experience by adding the open DNS numbers 208.67.222.222 and 208.67.220.220, I found today that every time I tried to open Safari it knocked me offline. So I've now resorted back to the number originally assigned to me.
What's going on with Safari?

Jake,
One Verizon DSL account; one Westell 6100 modem
Check with Verizon and find out what the max download / upload speeds should be.
If this is the plan you purchased: http://www22.verizon.com/residential/highspeedinternet/
*"And we’re constantly looking for ways to make our DSL faster—recently upgrading our Starter plan to 1 Mbps* download and our Turbo plan to 7.1 Mbps."*
1 Mbps download / 7.1 Mbps is hardly high speed.
You can check your upload/download speeds here. http://www.speedtest.net/
To realize faster download and uploads speeds you would need to upgrade your service.
This is more then just a DNS issue.

Problem with DNS and/or Virtual Host (works from inside, not from outside)

I am running several web sites (as virtual hosts) successfully on one Xserve (192.168.200), which are accessible internally and from the Internet (via forwarding port 80 on our firewall).
Now I am trying to add another web site (newmini.domain.com), which however is running on a Mac mini (also on the same subnet as the Xserve) at 192.168.100. What I did is make an additional entry under the Xserve's DNS for the domain (domain.com) (+ Machine..., pointing to 192.168.0.100). (I also made the necessary changes to the Mac mini's httpd and hosts configuration--no problem there).
Now, here's the strange thing: All computers on the subnet, whose DNS points to the Xserve, can see and browse newmini.domain.com fine. No problem. The computers ask the Xserve for the IP of the host in question, the Xserve says, "192.168.100", the request goes to the Mac mini, and it serves the web site as expected.
But this doesn't happen if the request comes from the Internet. Instead of seeing the Mac mini, the client sees the default web site of the Xserve... So it appears that somewhere, the virtual host part of the HTTP request is lost between our firewall and the Xserve.
Any ideas? Thanks.

It's not going to.
You say you've setup port forwarding on the firewall. Port forwarding only cares about the port number (80). It knows nothing about the nature of the request (e.g. the hostname that the web request is for). Therefore all extenal connections on port 80 get sent to the XServe. The newmini doesn't see the traffic at all.
If you only have a single public IP address you can only forward port 80 traffic to a single machine. Your options are to either use a different port number, or configure the XServe to proxy the connection to the mini (so now the traffic goes router -> XServe -> Mini -> XServe -> router), although that might not do what you want since it still places load and dependencies on the XServe.

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems n

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
Ollie
[email protected]

Since installing LTR 5.4, which I've now upgraded to 5.6, I've encountered repeated slowness and malfunctions in operations, especially when using the Compare View function and the Tab key to open and close the right and left side panels. Such problems never arose during two years of using LTR-4 and nothing else has changed on my computer. I have a pretty simple system with only a few plug-ins, which are usually not in operation. I have 12GB of RAM in my Windows 7 PC. I could illustrate these problems with screen shots if you would tell me how to submit screen shots. Otherwise I will try to describe the problems in words.
The problem is clearly cumulative, growing worse as usage time passes. Compare View feature gradually slows down and eventually seems to choke as my work session proceeds. If I Exit LTR and re-enter and start all over, things will work normally for maybe 30 minutes, but then the Compare View feature begins to become very slow to respond. In a recent example with my screen full of thumbnails in Library mode I highlighted two images to compare. LTR started to open the Compare View screen by first having the top row of thumbnails disappear to be replaced by the "SELECT" and "CANDIDATE" words in their spaces (but no images), but Compare View never succeeded in gaining control of the screen. After some seconds the top row of thumbnails reasserted its position and the Compare View windows disappeared. But LTR kept trying to bring them back. Again the top row of thumbnails would go away, Select and candidate would reappear, try again, and give up. This went on for at least 2-3 minutes before I tried to choose File and Exit, but even that did not initially want to respond. It doesn't like to accept other commands when it's trying to open Compare View. Finally it allowed me to exit.
To experiment I created a new catalog of 1100 images. After 30-40 minutes, the Compare View function began to operate very slowly. With left and right side panels visible and two thumbnails highlighted, hitting Compare View can take half a minute before the two mid-size images open in their respective SELECT and CANDIDATE windows. When the side panels are open and two images are in the Select/Candidate spaces, hitting the Tab button to close the side panels produces a very delayed response--25-30 seconds to close them, a few more seconds to enlarge the two images to full size. To reverse the process (i.e., to recall the two side panels), hitting Tab would make the two sides of the screen go black for up to a minute, with no words visible. Eventually the info fields in the panels would open up.
I also created a new user account and imported a folder of 160 images. After half an hour Compare View began mis-placing data. (I have a screen shot to show this.) CANDIDATE appears on the left side of SELECT, whereas it should be on the right. The accompanying camera exposure data appears almost entirely to the left of the mid-screen dividing line. Although the Candidate and Select headings were transposed, the image exposure data was not, but the data for the image on the right was almost entirely to the left of the line dividing the screen in two.
Gurus in The Lightroom Forum have examined Task Manager data showing Processes running and Performance indicators and they see nothing wrong. I could also send screen shots of this data.
At this point, the only way I can process my images is to work 30-40 minutes and then shut down everything, exit, and re-start LTR. This is not normal. I hope you can find the cause, and then the solution. If you would like to see my screen shots, tell me how to submit them.
Ollie
[email protected]

Open DNS

My very much up-to-date Safari has been exceptionally neurotic. The day begins at lightning speed, then slows down, then, from time to time, Safari simply knocks out my internet connection.
I've seen others here suggesting one could add 208.67.222.222 and 208.67.220.220 in their DNS menu. I haven't done it yet, simply when I click "+" to do so, my current numbers disappear. I was hoping the two series of numbers above could be added rather than substituted, so that if there was a problem with the two suggested numbers, I could revert back to the old ones, provided by, I assume, my internet provider Verizon.
Any thoughts on the above?

How did you add them?
If you are using a single computer: Open System Preferences/Network. Double click on your connection type, or select it in the drop-down menu, and in the box marked 'DNS Servers' add the following two numbers:
208.67.222.222
208.67.220.220
(You can also enter them if you click on Advanced and then DNS)
Sometimes reversing the order of the DNS numbers can be beneficial in cases where there is a long delay before web pages start to load, and then suddenly load at normal speed:
http://support.apple.com/kb/TS2296
If your computer is part of a network: please refer to this page: http://www.opendns.com/start/bestpractices/#yournetwork and follow the advice given.
(An explanation of why using Open DNS is both safe and a good idea can be read here: http://www.labnol.org/internet/tools/opendsn-what-is-opendns-why-required-2/2587 /
Open DNS also provides an anti-phishing feature: http://www.opendns.com/solutions/homenetwork/anti-phishing/ )
Wikipedia also has an interesting article about Open DNS:
http://en.wikipedia.org/wiki/OpenDNS

Open DNS and internet sharing

I am seeing strange behavior, and wondering if anyone has a thought about what is going on.
I am at a hotel with fast internet service over ethernet, but, for whatever reason, DNS seems very slow if I use DHCP to connect (timeouts of 5-10 secs to get to a new site). If I switch to DHCP with fixed DNS, and use the Open DNS servers (208.67.222.222, 208.67.220.220) the latency issues go away.
The interesting thing is that I am sharing the internet connection over Airport to my wife's computer (she connecting thru DHCP). If I use a fixed DNS for MY computer, then her computer cannot connect thru internet sharing. But if I use the (slow) DHCP connection, then she can connect through mine. I have not tried setting up her computer with a fixed DNS, as she really doesn't like me to change settings on her computer
Is this a known limitation of internet sharing, or is there something I should know?
TIA

In more detail, if my ethernet (the computer that is doing the sharing), is set up with Configure: Using DHCP, and DNS Server: 208.67.222.222, 208.67.220.220 (in Network Panel for Ethernet), then the computer connecting thru Internet Sharing in Sharing Panel is not able to access some or all resources thru http (ie, pages fail to load, or do not fully load).
However, if I clear the DNS Server part in the Network Panel, thereby using the the DNS Servers supplied by the hotel, then my computer's connection to the internet is slower, with long waits (presumably due to a slow DNS server), but computers accessing the internet via Airport thru my shared connection are able to browse the internet successfully.
I suspect that when I have a fixed DNS server in my computer, that fact is not broadcast to computers using the shared connection. But I am not an expert in TCP/IP, and may well be confused about how DHCP, DNS, and Apple's Internet Sharing work together.
Thanks for any ideas you have
A

Open DNS & Airport Question

I have a wireless network (Airport Extreme and Airport Express for range in the back of my house). Have 4 Macs on the network. All have Open DNS set in System Prefs>Network>Airport>Advanced>DNS.
Should I set one or both of the Airports to Open DNS also? If so, how? I looked at Airport Utility and see no ready way to do it.
If I should add OPen DNS to Airport, can someone tell me how in an easy to follow fashion?
Thanks in advance!

No, sorry.
All my machines are individually set for Open DNS: System Prefs>Network>Airport>Advanced>DNS: 208.67.222.222; 208.67.220.220.
The machines have been set this way for a long time.
My Q: Can/Should I set my Airports (Express and Extreme) somehow for Open DNS?
My general configuration is:Cable>Modem>Airport>4 Macs.
The hardware configuration is Cable into Router (Cox), Ethernet into Extreme, broadcast to Express 5 rooms away (to serve 2 of the 4 Macs); Ch 1 all.
Perfect connection - so don't want to mess with that.
Just want to know (if I can to speed up download time) --
Would (if possible) setting the Airport settings to Open DNS help my speed? If so, how in the world would one do that - - > set the actual base station to have Open DNS settings?
Make sense? Hope so!
Thanks!
Message was edited by: pcbjr

Follow up - DNS (internal domain has same name as external website)

Hi,
I am following up with on previous blog entry about resolving an domain internal name to an external website found here:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/4d97325b-ff3a-4f46-ba6e-dc3f4ff978e1/dns-internal-domain-has-same-name-as-external-website
On October 30, 2014
HayashiTech provided a response suggesting the use of netsh interface portproxy on the DC's to resolve this issue. There has been no feedback to this suggestion and I am very curious what opinions are out there for this suggestion as it appears to be the
best option provided yet.
Thank you in advance as well for all the great guidance I have found provided by Ace and his followers.

Interesting question. I've not seen that solution before, but having done a test on my lab setup it certainly seems to work as expected. Eg, using :
netsh interface portproxy add v4tov4 listenport=80 listenaddress=dc1.abc.com connectport=80 connectaddress=www.abc.com
on my DC where I've setup a working external domain name with the www record pointing to the website, and the non-www record pointing to the DC, requests to the non-www address are successfully being redirected to the www address (after confirming it didn't
happen prior to adding the portproxy).
So on the face of it that does look like a workable solution. I haven't used it myself in anger obviously, but the two downsides I can think of immediately to this solution are :
1) This operates as a proxy, so unlike the IIS method that Ace mentioned where it would tell the client to go to the www address instead (so the client connects direct), this method keeps your DC acting as a middle man, eg all communications to that address
go through your DC rather than direct from the client to the website. Depending on what they're doing on the website this may or may not be an issue for you.
2) Since the client is continuing to connect to the DC throughout, if you ever did need the have something on the DC responding to port 80 then you could have issues. That said, according to
https://technet.microsoft.com/en-us/library/cc731068(v=ws.10).aspx the portproxy listenaddress can be a FQDN rather than IP, so that could mitigate any issues there.

Having trouble setting up Open DNS with mac.

When I try to set up Open DNS I get the following error message:
Safari can’t open the page “http://192.168.1.1/Basic.tri” because the server unexpectedly dropped the connection. This sometimes occurs when the server is busy. Wait for a few minutes, and then try again.
I have a Linksys router. I can get the router so save the settings using my Microsoft laptop, but I get an "oops" error message from Open DNS saying I am not set up on their site and just sends me back to step one. Does this sound familiar to anyone?

No, you cannot put the router in front of the modem.
You might look for any information your ISP gave you for your modem, such as a user guide. Or use the instructions at OpenDNS for a Motorola router, it should be similar. Remove the router and directly connect just one computer to the modem and try to access the modem's built in utility, as you have with your Linksys router. Motorola's default address appears to be "http://192.168.10.1/", the default username is "admin", and the password "password". If you encounter a question about obtaining the DNS service dynamically, check NO, then handset the OpenDNS servers, save and possibly restart the modem.
If you are successful in configuring the modem, go back to the router and leave the DNS settings blank, as well as on each computer. Then the computers should receive the service dynamically from the modem.
After all that, hopefully the OpenDNS website detects you using their service and allows you to proceed with setting up your account.
Dah•veed

Help setting up Open DNS with new airport extreme

I cant seem to get Open DNS to work with a new airport extreme. The status says I am not using Open DNS and its not filtering anything. I have followed the exact steps for set up listed on their website, checked the dns settings, cleared both caches and restarted the computer, modem and router with no success. I set the airport up in bridged mode, although I tried the other option under setup, but not sure what I was doing? I picked up this router because I wanted easy set up and the apple store assured me it would work with Open DNS. Oh, and I also downloaded the latest firmware update on the router. Can anyone help me with the settings or what else I need to check?

Sorry, I am not familiar with this product, so I checked online to pick up some information. Here I am referring to the information found here:
http://www.dslreports.com/faq/6096
I found that your device is mentioned as follows in the intro under Section 1 of this document:
The BellSouth supplied Westell 2100, 2200 and 6100 models (Models A90-210030-04, B90-220030-04, and B90-610030-06/C90-610030-06, respectively) share many features and functions.
Next, I am referring to the information under Section 2, under the heading of Standard Default Mode Connection (separate hub or switch present). Unless you have changed the configuration on the Westell, this is how your device is operating. In this mode, the Westell device is acting both as a modem and router in one unit.
So, an attached router (AirPort Extreme) must be configured as a switch to work correctly. That is what Bridge Mode is....the AirPort Extreme is operating as a switch when it is in Bridge Mode (which would be the correct setting to use when the Westell is set to its Standard Default Mode).
Any changes that you want to make regarding DNS settings would need to be made on the Westell device, since it is acting as the main router on your network.
In Bridge Mode, the AirPort Extreme simply passes that information through to its connected devices. You will not be able to make any DNS related changes on the AirPort Extreme since it receives that info from the Westel device. Some service providers force you to use their DNS servers, so you might want to check with Bell South or AT&T for more information in this regard.
If you want to be able to configure the AirPort Extreme as the main router on your network, and instruct it to use the DNS information that you want, you will need to refer to the section under the heading of Bridged Ethernet Mode ( separate router present).
Please note that the first item under this heading specifies that "This is the preferred configuration when using a separate external router..." (which would be the AirPort Extreme in your case)
So, it appears to me that this would be the way that you must reconfigure the Westell device to allow the AirPort Extreme to function as the "main" router on your network. In this type of setup, you will be able to enter the DNS information that you want to use under the setup for the AirPort Extreme and it will act as you instruct.
The AirPort Extreme would not be configured in Bridge Mode for this....it would be configured to "Share a public IP address".
The next item in the article specifies that you "Must use a PPPoE client on the Router." This means that the AirPort Extreme would be configured to Connect Using = PPPoE as follows:
AirPort Utility - Manual Setup
Click the Internet icon
Click the Internet Connection tab
Connect Using = PPPoE
You would enter your user name (probably your email address), password, etc in this area. Leave the Service Area box completely blank. Set Connection to Always On, and Disconnect if Idle to Never
Click Update to save the new settings. Power off the Westell device after this and then restart it so that it will pick up the new information that you have programmed into the AirPort Extreme.
I want to stress that this is how I would try to configure the Westell and AirPort Extreme. But, as I said, have not used a Westell device, so I cannot say that this will work correctly for you.
It might be an excellent idea to contact Bell South or AT&T Support to ask for their opinion on this before you decide to change the configuration of the Westel device and the AirPort Extreme.
This type of thing can be intimidating for users, so you might elect to use the services of someone like the Geek Squad at Best Buy, or a similar service from a local computer firm. Perhaps the Apple store could help as well.
If it is not critical that you use Open DNS, you might want to simply leave things "as is", with the AirPort Extreme in Bridge Mode.

Problems setting up open DNS

I have been trying for several days to get open dns set up on my home network and imac and am running into a wall. I have installed the correct numbers on my router and even added them to my modem. I checked on my imac ethernet network settings and the dns numbers are displayed there correctly. I have been in contact with Open DNS through a service ticket and been on their forum and tried multiple solutions. I appear to be using the open dns connections but even after multiple attempts to adjust my settings, I cant get it to filter Adult sites (I did set up an account as directed). Im about ready to give up on the service but thought I would try hear to see if this might be a common issue and if anyone has recommendations??

If you goto http://opendns.com
if you are using their service you should see in your browser.
If you are able to access a pron site that you accessed prior to turning on filtering then this problem may be due to the browsers caching the information.
I would suggest you clear your browsers caches.
also clear the dns cache on your mac use the following command in your terminal
dscacheutil -flushcache
also use the following command to list what dns servers your mac is using and post the results so I can check them.
/usr/sbin/scutil --dns | grep nameserver

_SERIOUS_ DNS malfunction

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