Unable to access internet via my airport extreme base station

I have an AirPort Extreme Base Station which is hard wired to a Mac and which communicates wirelessly to a Mac in another room. My internet access is via comcast. Direct connection from this computer to my modem works fine, but not if I go through the AirPort. The LED lights of the AirPort indicate normal network activity, (flashing/on/flashing). I have tried disconnecting and reconnecting everything and rebooting the computer. The system has been working normally through the AirPort until today.

I would recommend that you do the following as a minimum:
Power-down the modem, AirPort base station, and computer(s).
(OPTIONAL) Disconnect the AirPort base station from the Internet broadband modem.
(OPTIONAL) While all of the devices are powered-down, perform a "factory default" reset on the base station. This will get it back to its "out-of-the-box" configuration and make setting it up much easier, especially if you use the "Assist me" process within the AirPort Utility. (ref: Resetting an AirPort Base Station or Time Capsule)
(OPTIONAL) After the base station resets, go ahead and power it back down.
(OPTIONAL) Reconnect the AirPort base station to the Internet broadband modem. For the Extreme and Time Capsule, be sure to connect the cable to the base station's WAN (circle-of-dots) port.
Power-up the modem; wait at least 10-15 minutes to allow it adequate time to initialize.
Power-up the AirPort base station; wait at least 5-10 minutes. Note: The AirPort's status light may continue to flash amber after it has intialized. That is because, there may be some additional configuration items necessary, like setting up wireless security, before the overall setup is completed to get a green status.
Power-up your computer(s).
In this basic configuration, the AirPort base station will broadcast an unsecured wireless network with a Network Name (SSID) of Apple Network NNNNNN. Network clients, connected to the base station either by wire or wireless, should now be able to access the Internet through the ISP's modem. Once Internet connectivity has been verified, you can use the AirPort Utility to configure the base station for wireless security and any other desired options. Please post back your results.

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Currently use Airport Express -1st Generation-to access internet -purchased 2014 Airport Extreme base station -can I import Express back up configuration to keep current settings . Or is it best to do new Airport Extreme as a new Network .

Currently use Airport Express -1st Generation-to access internet -purchased 2014 Airport Extreme base station -can I import Express back up configuration to keep current settings . Or is it best to do new Airport Extreme as a new Network .

Just spoke with Cisco about the router. They said the router is compatible with the E1500. They suggested that I contact Apple to see if their default IP address was that same as the router (192.168.1.1). They told me I would have to change it if that was the case. How would I do that?

Mac Book pro can't connect to Internet through Apple airport extreme base station

I had problems connecting to the internet in the past with my macbook pro. One day it suddenly started working again but then I bought a second apple TV I lost connectivity. I have tried changing the IP address manually and while it shows me connected to the wifi I am still with out internet. When I hooked up the new Apple TV that I bought it booted my computer from it's ip address. The apple TV though wouldn't work and now nor would my computer. I ended up setting the Apple TV's ip address manually and now it works fine. My computer on the other hand does not no matter if I set it manually or not. Even if I plug in the ethernet cable from the base station it doesn't work. It show that it has a self assigned IP address. After I set it manually it shows that I am connected both via wifi and the ethernet cable but I can't connect to the internet. If I plug the modem directly into the computer bypassing the base station I get internet and it is using the IP address that worked originally.
It has something to do with the connection from the base station to my computer but this is odd considering every other device I have: iPhone 4, apple tv, apple tv, apple mini with retina display all work perfectly via wifi (newest apple tv had to be set manually as I stated above but now works fine). When I check the ip of the base station itself it seems to be different from the ip of the computer when the computer was connected directly to the router. I don't understand why my computer now can't connect to the internet via the base station whether it be wifi or by ethernet. Can you please help me trouble shoot this?
I have an AirPort Extreme base station which allows up to 50 users and a 30 meg connection speed.
I have a MacBook Pro (17-inch Early 2009), OS X Mavericks (10.9.2)

It has something to do with the connection from the base station to my computer
I don't think so..
I just posted a reply which totally vanished.. strange strange website now.
Please post some screenshots of your AE setup from the airport utility.. I want to see the summary page, then the network and internet tab.
Please tell us what modem you use.. is it a router??
If you have satellite or 3G wimax etc service they often are limited to 5 IP addresses... the AE takes one and then 4 more devices can join .. no more.
You need to also give us the screenshot of the IP you are getting in a computer that works.
EDIT
Sorry this is half double post.. the previous page refused to display.. now it has returned..

Why can't I no longer connect to the Internet via my AirPort Extreme Base?

I suddenly can no longer connect to the Internet through my AirPort Extreme. Everything was fine until this morning. My Base Station is connected to a DSL modem and then my computer connects to the Internet wirelessly through the Base Station. The center light is on in the Base Station. The left light flickers telling me there is wireless activity. I can still access my printer through the Base Station. But the right light is no longer flickering. I have rebooted everything several times. Does anyone have insight into this problem. This is the second time this has happened. For over a month I could not access the Internet through the Base Station, and then suddenly and arbitrarily it started working again. This morning it just stopped again.

I've had the same problem - mine started after I upgraded to 10.4.8 on my MacBook a week or so ago.
I can see other networks around my home and when I travel, but can only connect via ethernet cable (and my ISP is comcast - I thought the upgrade was supposed to help make connecting with comcast better).
My G3 has no problem connecting, so I don't think it's exactly a problem with my modem, or base station, or even comcast. I think it has something to do with my base station and upgrading to 10.4.8. Btw, dropping back to 10.4.6 hasn't helped.

Airport Extreme Base Station and Multiple Computer Access to the Internet

I have my IMAC connected to the internet via the Airport Extreme Base Station. When I am able to connect, my son's MacBook cannot. If I preform network diagnostics and reset the base station so he can connect (which appears to be luck on my part), I can no longer connect. When I first set this up, I had it working with all computers in the house. I tried to expand the system to boost the signal in our house with the airport express units. I have since removed them and started over, but still cannot provide internet access to more than one computer.
Help

Try this first...
Modem/Router Power ReCycling
- Power-off the DSL/Cable modem, Internet Router, & computer(s). (Wait at least 30 minutes. If possible, leave the modem off overnight.)
- Power-on the DSL/Cable modem; Wait at least 30 minutes.
- Power-on the Internet Router; Wait at least 5 minutes.
- Power-on the computer(s)

Magic Packets with AirPort Extreme base station

Ok, so I would like to be able to wake my iMac with magic packets over the internet. It is connected to the internet via an AirPort Extreme base station, and I know that it won't work over wireless networks, but the iMac is connected and gets internet via ethernet from the AirPort. Is there any way I can set up port forwarding or something like that to wake my iMac remotely?

...should I have AirPort on my iMac turned off or on...
Since you are connected via Ethernet you would turn AirPort off.
Does the connection automatically default to Ethernet, even if AirPort is set "on," because presumably Ethernet is faster.
No. It gives priority based on how they are ordered in the list of network connections.

Problem consistently printing via new (summer 2011) AIRPORT EXTREME BASE STATION and Brother wireless printer (model HL5370DW). What am I doing wrong?

Thanks in advance for any help you folks can offer. I'm a newb here and will try to offer as much detail as I can about the dilemma at hand.
Scenario: Home network has been recently set up for wireless internet access via NEW Airport Extreme Base Station (purchased September 2011). Units accessing the network include: 2011 Macbook Pro, 2011 Macbook Air, 2007 Macbook, 2009 Macbook Pro, 2 iPhone 3GSs, and a 1st-gen iPad (and a partridge in a pear tree AEBS is configured to run WPA2 encrypted network, as well as a WPA2 guest network. I am attempting to yoke a BROTHER HL5370DW wireless B or G/ ethernet / usb-capable printer to the main network such that any and all units can print wirelessly or its equivalent (i.e., via printer hooked to AEBS through USB hub)
Problem: Despite configuring the Brother printer to recognize the main WPA2 network I created, I am unable to get wireless printing to work. My workaround was to physically connect Brother printer to AEBS via USB, specifically using a Belkin USB hub (after all, I wanted access to usb drives, as well as the printer). This workaround works ONLY SOME OF THE TIME. Generally, after a fresh boot of any computer or after a restart of the AEBS, any given computer will be able to print (i.e., any computer wirelessly connected to the main WPA2 network recognizes the printer). HOWEVER, at random times, printer access is gone (as is access to USB drives connected to AEBS's usb hub). Wireless networks are still up and running when that happens. IS THERE A WAY TO GET THE USB HUB's devices (i.e., printer and usb drives) to ALWAYS REMAIN AVAILABLE AS LONG AS THEY STAY CONNECTED TO THE AEBS? In other words, what accounts for the intermittent loss of the usb peripherals?
Sometimes, I just shut the airport off on whatever computer is having this problem, and the problem goes away. Sometimes, the problem is present across all computers in the house, sometimes only a few are affected. I can ALWAYS see the AEBS in the Airport Utility if the AEBS is connected to the particular computer via ETHERNET CABLE.
My theories:
- true wireless printing (i.e., without usb hub workaround) doesn't work because the N network somehow isn't backwards compatible with the Brother printer, which, i believe, is B/G. Although...isn't Wireless N networking supposed to work with BG devices? I did find a thread (https://discussions.apple.com/thread/2570774?start=0&tstart=0 ) that explains some of the particulars of WPA2 encryption and Wireless B/G issues, but it was beyond my level of comprehension (I'm a psychologist, but not an Apple Genius
- The usb workaround is only intermittently viable because of some flaw in the Airport or Airport Utility that causes dropouts to happen when a Macbook Pro or Air's lid gets closed or one gets opened after having been at a different network (e.g., at my office).
QUESTIONS:
- Should I try to use my old router (7 year old Linksys WRT54G) as an access point and connect the Brother printer to that G-router? How do I do that?
- I wouldn't mind just relying on the usb hub method if I could just insure more consistency (i.e., no random dropouts of peripherals). How could I do this?
Rule out:
- wireless printing works on my printer - it was being recognized back before the AEBS. I had the Linksys router running a WEP network and had the wireless printer talking with no cables to the router and the computers. (I just don't want to revert to using WEP encryption given its lack of security and my trying to protect HiPAA related health information on behalf of patients)
Any help will be greatly appreciated.
Thanks in advance!

13 ASCII characters = 104 (aka 128)-bit WEP
encryption
If turning off WEP works, then you just need to
provide the cameras with the "Equivalent Network Password".
One of the problems with WEP is that the actual
standard relies on a 10 character HEX key for 40bit
WEP and a 26 character HEX key for 128bit WEP.
In order to make things easier, vendors use certain
algorithms to convert simple alphanumeric passwords
(or passphrases) into HEX keys, thus enabling the use
of simple easy to remember WEP password rather than
lengthy HEX keys. The problem is that different
vendors use different algorithms to generate the HEX
key and therefore a ASCII password on an AEBS will be
hashed differently on a non-Apple client and vice
versa.
You may find the following article helpful:
- Apple article, especially the part about
"Third-party client to Airport".
Brilliant idea about trying the system with No encryption on... that DID solve the problem... almost.. once I turned off the encryption option, and restarted the Airport, I got a dialog box showing that the "Base station needs attention" but it didn't indicate WHAT kind of "assistance" it needed. Nonetheless, I closed out of the Airport program only to find that the indicator light, which had been Green, was now, flashing Yellow and I could not connect anything, including my computer. I opened the Airport program again and found the ONLY way I could get the Green light on was to select some sort of encryption option... then the light would go Green again but my cameras would not hook up again, and when I went back in and ONLY changed the option to NO encryption, I got the yellow flashing light and the "this base unit needs attention" warning...
I think your suggestions are almost on the mark... is there any way of reconciling the WEP coding between the cameras and the Airport??? Or turning off the encryption option and STILL have Airport work?
Thanks again for your help and suggestions... I really appreciate it.
geoff

Airport Utility 5.4.2 was unable to find Airport Extreme base station.

I downloaded the new Airport Utility 5.4.2 to my 2009 24" iMac with Snow Leopard. Now it is unable to find my Airport Extreme base station or Airport Express. My iMac is connected to the network via the Airport Extreme base station but the Airport Utility cannot find it. All I get is this message "Airport Utility was unable to find any Apply wireless devices. Make sure the Apple wireless device you want to set up is plugged in and in range of your computer and then click rescan to try again". I clicked rescan numerous time with no luck. I even downloaded the Airport Utility 5.4.2 again with no luck. What is wrong??? Everything was working fine until I downloaded the Airport Utility 5.4.2.

Thanks for the info.
Following your same steps exactly, I am able to save the configuration file to the desktop, or navigate to another folder to save it at that location.
I was able to do this previously with 10.5.x and with current Snow Leopard. Notice that you list 10.4.x as your operating system. If you are still running this OS, it could be that 10.4.x does not allow this feature with 5.4.2?
Not sure if downloading another copy of 5.4.2 would be worth the pain, as I'm inclined to believe that it probably would not help solve your issue. If you decide to do this, please post back with your results.

Communication errors with airport extreme base station

Please help.
I am able to surf the internet wirelessly on my two macs via my Airport Extreme Base Station. However I am unable to print wirelessly via my new HP printer connected to the USB port on the base station.
More worryingly I am unable to use Airport Admin Utility, Airport Set-Up Assistant or Airport Firmware Updater. Whenever I try to use one of these applications they experience errors communicating with the base station. I wonder if this is related to the printer problem?
I have performed soft and hard resets on the base station in addition to removing the power cord - none have been sucessful.
Can anyone please help me.

I may have a solution. I recently upgraded from an ibook to a macbook pro, and had the apple store "migrate" my files, etc., from one to the other. Got it home, everything's fine, airport conects, no problem. Go to print, can't print, decide to run Airport Setup Assistant to reconfigure (why not ?) and, lo. when it gets to "Network Configuation," I get : "An Error Occured while trying to communicate with this base station." Try all the usual tricks, including hard restart (internet connection is fine throughout), but the set-up assistant couldn't get past that point. Talked to apple support, we ran through all the options. He did suggest wiping the network preferences for airport off the harddrive and starting over, but since I had a good internet connection, I decided to wait.
So here's the thing: I got on Airport Administrative Utitity, clicked "Configure," and then "Network." I know next to zip about advanced options, but I decided to click "Distribute IP Adress" And under "Airport Client Computers" selected "share a single address." I left everything else alone. It reset to to the new options, and then, out of curiosity, I opened up set-up assistant, and TA-DA, I got past the screen I was stuck on, and when the next asked me if I wanted to keep all the same settings, I said yes. I kept selecting "Keep/yes", and then saved or okayed the changes. I then got a message that it would restart base station, I was also configured to print (my printer hp laser 1320 was plugged into the base station for all this), and, yes, it does now print.
I don't know if this is the hard way of doing something that I could have done more easily, and/or if even though I had an internet connection, the base station or the set up was still looking for the ibook. I'm sorry for such a long reply, but wanted to include all the steps I took and the exact situation. Does anyone know if I've endangered my security by checkig the "Distribute IP option ?" This is a home computer. Good Luck and hope this helps someone

Comcast HSI, AirPort Extreme Base Station issues

Recently, I've been having some connection issues with my Comcast High-Speed Internet and my AirPort Extreme Base Station. I'll be connected fine one minute, and the next my AirPort monitor drops to 2 bars of signal and nothing will connect. Resetting the base station and the modem works about 50% of the time, while just sitting here "dealing with it" works the other half of the time.
I rent my cable modem from Comcast, and I believe it is the Terayon TJ715. I went to the Apple Store San Francisco and had my base station replaced, thinking it was the culprit, but alas, the problem is continuing, only less frequently.
I've replaced all my ethernet cables, tried it with my AirPort Express (which works more often, yet has the same problem occasionally), yet my connection uptime and signal still drops to 2 bars and essentially disconnects.
Even stranger, the computer I have connected to the LAN port seems to work fine even when the computers connecting wirelessly are having issues.
I'm going down to a Comcast Support Center on Friday to (hopefully) replace my modem with a newer model (someone told me that older Comcast modems "kill" AirPort Base Stations), but other than that, any ideas? Anyone have this type of issue with Comcast in the past?
The 3 machines im running are:
Dual-Core 2.3Ghz Power Mac G5 via AirPort
867MHz PowerBook G4 (Titanium) via AirPort
800MHz iMac G4 (Flat-Panel) via Ethernet
Thanks,
Alexis
Dual-Core 2.3GHz Power Mac G5 Mac OS X (10.4.3)

Don,
Thank you for the link. However, it did not seem to solve my issue.
It's not that I haven't been able to connect to the internet at all using wireless. I will be connected fine (all 3 computers connecting to the internet simultaniously) when suddenly, any machine connected via AirPort (specifically my Dual-Core Power Mac G5) will receive two bars of signal and will no longer connect to the internet. The only remedy I've found is to reset both the cable modem and AirPort Extreme Base Station, and this only works about 50% of the time.
I am going to have Comcast replace the modem (and in the meantime, get new Ethernet cables) tomorrow, so hopefully I won't be having this issue anymore, but I'm more curious what may be causing the issue. Have you heard anything about older Comcast modems causing latency issues with AirPort Extreme Base Stations?
Thanks again,
Alexis

HT1218 After a recent iTunes update attempt iTunes no longer functions and the airport extreme base station is not accessable on our computer. We still have wifi but cannot access the base station software.

After a recent iTunes update attempt iTunes no longer functions and the airport extreme base station is not accessable on our computer. We still have wifi but cannot access the base station software.

Thanks for the reply. I appreciate the response. I tried that approach this evening and it didn't work for me. (Technically it worked for me, when I was hardwired into my base station, but would not work for me wirelessly, which is my main issue.)
Again, using the approach you recommended works only if I have my ethernet cable attached to the LAN port so my computer is communicating directly to the base station through the hard wire. I am able to scan for my base station and make setting adjustments normally this way too.
As soon as I disconnect from the LAN port and try to go wireless is where I run into problems. The Base Station's wireless network I created is available to choose in the top right corner of the monitor with all of the other available wireless devices/networks -- but the network I created does not have access to the internet. I am also unable to configure my Base Station wirelessly. When my Airport Utility tries to scan for the Base Station and Network, it cannot find any Apple Wireless Device. It's like the Wireless Network in my base station is not sending out a signal.
Is there a way to resolve this issue?

2 airport extreme base stations later and still no internet connection-

Sorry - yet another beginner with internet connection troubles! (I have read all the posts I could find relating, but without any help).
I have had a Demon broadband account now for about a month (I’m in the UK) and in that time I have purchased a D-Link DSL-300T Ethernet modem and an Airport Extreme Base Station. I got wireless internet working relatively easily – with a powerful range over the whole house and garden, but then one Sunday night, the internet connection via the base station suddenly ‘died’.
I spent the following 3 days scrutinising all of my settings of both the Modem and the Base station, re-setting both, and bought new Ethernet cables / micro filters etc but with no luck. (I’ll point out at this stage that my broadband account is still active, and if I connect the Ethernet modem directly to my iBook [wired] I can still get my broadband connection. Alternatively, I tried daisy chaining the modem to the base station and then via an Ethernet cable to an iBook, but no connection could be made).
When wireless, Airport Admin recognises there is a modem there, and under preferences > network under Airport it states I am connected to the internet – but I’m not.
I then phoned D-Link and they confirmed my firmware was up-to-date for use with Apple products and talked me through all of the modem settings and tweaked a few things, but there was still no connection to the base station. I then phoned Apple. They were incredibly helpful (as ever) and after 35 min. came to the conclusion the base station might not be re-setting itself properly. The replacement one came yesterday, and again I spent a number of hours trying to get it connected to the internet, but there is still no internet connection via airport and I can confirm this from both my eMac and iBook.
Reading through the forums on here, I understand that my particular modem is problematic with the base station, but I can’t work out why it use to work and now it doesn’t! One theory I have investigated is that the firmware of the base station is two advance for the modem following an update, but after reinstalling the original firmware I started with, I still have no luck.
- The eMac is running 10.3.9 / iBook is running 10.4.3. The base station is reinstalled with the latest firmware via system update. The first base station and the modem were delivered to me 31/10/05.
Any help or suggestions would be really appreciated if anyone has any ideas
Thanks for your time
Will.
UK.

http://discussions.apple.com/thread.jspa?threadID=2316
78&tstart=0
I think if you follow the instructions I gave in this
link you will be fine.
Remember, If you for any reason loose your
connection, it is normally always a Power Issue..Your
ISP is down for service ..or some other anomoly, If
you were good before your settings will still be
good...Good Luck...Don
Hi Don,
Thanks for you quick response. I printed off the instructions you posted on the support forum before, and ran through your procedue exactly, (twice) but I'm sorry to inform you that I haven't been able to re-establish my wireless internet connection. Would it be safe for me to assume at this stage that my modem is indeed fualty? It contines to work fine independantly, (I'm using it right now) but it can't seem to make contact with the basestation.
Will.

Connect to Linksys Cable Gateway via AirPort Extreme Base Station?

Thank you in advance for any replies.
I have the following new setup:
A G3 Blue tower running OS X 10.4.10 is successfully connected to the internet via a Linksys WCG200 Cable Gateway connected to RCN's cable internet service. The WCG200 unit has wireless capacity though it's connected to the G3 tower via ethernet cable.
A second Mac (G3 iMac DV running OS X 10.4.10) is in another room in the office. I'd like to set it up with internet by wirelessly connecting with the existing WCG200 unit using an Airport Extreme Base Station (AEBS) I've recently acquired. To ensure a smooth process, I reset the AEBS to factory settings and installed the AEBS software (version 4.2) onto the iMac DV. Finally I plugged in the AEBS into the iMac DV using an ethernet cable plugged into the AEBS's WAN port (AirPort Admin Utility advised me to do so).
That's the hardware configuration. Working out the software and configuration details is proving 'niggly'.
First, I used the AirPort Setup Assistant to configure the AEBS. I told it to Set up a new Base Station, then to set it up as connecting to the internet using a Cable modem (the top option of two—the second was to set it up with internet through a LAN). I set up the name and passwords for the Base Station and had the utility configure the AEBS accordingly.
No internet connection occurred. I tried using the Internet Connect utility in the Applications folder, but no button or visible option for connecting via AirPort appeared, as the Setup Guide indicated it should, only a button for a VPN appeared.
I called Apple and asked whether it was even possible to connect to the internet using the AEBS talking wirelessly to the WCG200 unit. A tech told me it could be done by going into the AirPort Administration Utility, going into Configuration, clicking on the WDS tab and inputting the MAC address for the WCG200 unit, then going into the Airport tab and typing in the channel that the WCG200 is using. Note that the WCG200 unit has 3 MAC addresses listed; one each for “modem MAC address,” “WAN-MAN MAC address,” and “WAN-DATA MAC address”. I used the “modem MAC address.
The Apple tech added that it might need further tweaking, but that Apple couldn’t provide this tweaking and that I might check various forums if need be.
I followed the Tech’s advice, at which point the utility informed me that it couldn't use DHCP or NAT with this setup’ and to make sure that the "Distribute IP Addresses" checkbox was deselected under the Internet tab. This I did, but it was already deselected. I told the utility to update the AEBS accordingly, and restarted everything, including the 2 Macs and the WCG200.
Result:
No connection.
Tried it again with the Ethernet plugged into the AEBSs LAN port, still no connection.
Help! Can’t I get the AEBS to even see the WCG200? I know wireless is properly functioning in the WCG200 because another user with a Windows laptop connects to it wirelessly. The Mac Tech also mentioned that this could be relatively easy with an AirPort Express piece of hardware (Card? Base station?) but that it would be difficult with the Airport Extreme Base Station.
At this point we’re willing to spend $100 on getting this up. What would be our best option in terms of equipment, or can connectivity be accomplished with what we have?
Thanks again,
skyheart

skyheart, Welcome to the discussion area!
In theory using WDS would provide what you need.
In reality the Linksys device is not compatible with Apple's WDS and therefore this will not work.

Cannot access certain web sites through Airport Extreme Base Station

I use the old (round) Airport Extreme Base Station (AEBS). Approximately three weeks ago I could no longer connect to americanexpress.com or to Godaddy or their mail servers. About a week ago the Godaddy sites started working again, but the American Express sites are still not working.
My current setup:
- AEBS connected to Time Warner New York cable modem
- Three Airport Express units - two connected to speakers, and one set up with WDS to provide Ethernet access to computer (PowerMac G5), which is in a separate room from cable modem
- I also have an Airport card in my G5 to connect directly to the wireless network (but that doesn't solve any of my problems)
I have tried resetting all the units, and have also tried running the network with all the Airport Express units turned off, none of which as allowed me to access American Express.
I have the exact same problems with my work-issued Windows 2000 laptop when logged in to the wireless network.
When I plug a computer directly in to the cable modem, I have no problem accessing any of the sites, which leads me to believe that the solution somehow lies with the AEBS - I just can't figure out what it is.
Any help/suggestions are much appreciated.
PowerMac G5, 23" Cinema Display, Airport Extreme Base Station (802.11b/g) Mac OS X (10.4.9)

If you're having trouble with throughput performance or just connecting to some websites, try changing the MTU value, on your Mac, to 1492. (The default value is 1500.) To do so, you can use a utility, like Cocktail or via OS X's Terminal.
MTU will vary with connection type. Cable and non-PPPoE, can use up to 1500, whereas PPPoE connections (WinPoet, RASPPPOE, Enternet, etc.) can only use up to 1492. For secure VPN connections (i.e., IPSec) use a MTU value less than 1500.
The best value for MTU is that value just before the packets get fragmented. To test, use the Ping utility.
OS X: ping -D -s 1472 www.dslreports.com
WinXP: ping -f -l 1472 www.dslreports.com
Reduce 1472 by 10 until you no longer get the “packet needs to be fragmented” error message. Then increase by 1 until you are 1 less from getting the same error message. Add 28 more to this (since your ping packet size, not including IP/ICMP header is 28 bytes). This will be your MaxMTU. (Note: If you can ping thru at 1472, stop, you’re done! Add 28 and your MaxMTU is 1500.)

Wireless connection to internet with mac pro tower and airport extreme base station?

Hi, I have an airport extreme base station and a mac pro tower without a airport card. My internet wireless router is a great distance from my computer so I can't connect the base station directly to the router. I've attached the airport extreme base station to the tower via an ethernet cable, the base station seems to be wirelessly connected to the home network but the browser is showing "not connected".
Please help.
Thanks

Shouldn't the Airport base station be able to connect to it wirelessly?
It might be possible, but the Ethernet ports on the AirPort Extreme would not be enabled, even if it did connect to the Thompson' WiFi signal.
As Tesserax notes, among the Apple routers, only the 802.11n versions of the AirPort Express have the capability to "join" a wireless network with the Ethernet port being enabled.

Unable to access internet via my airport extreme base station

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