PowerBook G4 17" Airport loses connection to Airport Extreme

I am presently running 10.4.5 on a PB17 G4 connecting at home to an Airport Extreme Base Station running V5.7. I additionally connect to another Airport Extreme Base Station at my office running V5.7. After about 5 minutes of connection time, my PB17 begins an off and on connection cycle which never seems to end. After a few minutes of handshaking between each Airport, the PB17 would maintain a connection for 5 minutes or so and then begin dropping the connection all over again.
This problem has been occuring for several weeks and existed when the PB17 was running 10.4.3, as well.
If it did not seem to be some consistant over time, I would wonder if the internal antenna is no longer seated properly.
BTW, I also run an iMac G5 (with built-in iSight) on the same network. It never has a problem.
Any suggestions??
PowerMac G4 DDR 1 GHz

Problem is still there .. and it's getting worse. Is there any possibility to uninstall this "security" patch from January?
Maybe this'll help a little:
Ping shows up this strange behaviour when the connection is lost:
ping: sendto: Host is down
ping: sendto: Host is down
*snip about 15 lines*
ping: sendto: Host is down
ping: sendto: No route to host
ping: sendto: Host is down
ping: sendto: Host is down
*snip about 15 lines*
ping: sendto: Host is down
ping: sendto: No route to host
and so on .. the log of the various routers tell me, that the Mac disconnects every 8 seconds after reconnecting to the network. And it takes another 26 seconds for the MAc to retry the connection (without success ) ...

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I do not have the answer for you, but I am suffering the same thing with my macBook Pro. After about 15 minutes, I loses the connection, and the airport icon in the menu bar goes transparent. Nothing works to renew the connection except to unplug and re-plug my router. If you hear of any remedy, please post.
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Airport loses connection but still shows 4 full bars

I've got a strange problem I haven't been able to figure out myself.
On my MacBook Core Duo (original 2006) on 10.6.2, my airport loses connection with my wireless router (Linksys WRT54G) after 5-10 minutes of use. My airport still shows a full signal, but I lose all connection (I cannot even see the router itself when I navigate to its IP address in Safari - normally I get the web based configuration panel). If I turn off Airport and then turn it back on again, I get my connection back for another 5-10 minutes.
I am using WPA encryption.
I get this problem when my computer is far away from the router or very close.
I do not get this problem on our other computers - one Vista desktop and and two XP laptops.
I have no connection problems when I plug my modem directly to the MacBook via ethernet.
My only thought at this point: there are numerous (8-10) other 802.11x networks in my building. I've done my best to choose a free channel, but the best I can do is choose a channel only 1 channel away from others (i.e., choose 7 when others are on 6 and 8). I wonder if signal interference is an issue...but why would all my Windows machines have no problem?
I'm out of ideas at this point - I appreciate any help :)! Thanks!
Message was edited by: MBaker22

MBaker22
I am having the SAME exact problem with my Mac. I have a late 2008 white 13" MacBook and it's been upgraded to Snow Leopard and I'm running version 10.6.2. I am wondering if any Apple employees can assist us on this issue or tell us if the impending 10.6.3 upgrade will have a fix for this.
My Airport will be connected to my wireless network and be working fine. As MBaker22 says, after 5 minutes the connection seems fine, the IP is fine, the network is fine and the network works for other laptops and desktops in my house BUT I can't access the Internet. All of a sudden I have no ability to check for software updates, browse the web or do anything that connects to the Internet.
Some other strangeness. When I try to hit the IP of my wireless router in my web browser, it asks me for credentials and then just sits there saying Connecting to 192.168.1.1...
It also only says connecting to www.google.com or www.cnn.com or www.yahoo.com when Airport is behaving this way.
If I plug in my Ethernet cord to my Mac everything works just fine so this is an Airport issue and probably an issue with Snow Leopard? I'm not sure.
Anyway the REALLY weird thing is that I can ping some websites and not others in the terminal when Airport starts behaving this way. That might be because of caching but either way.
Here's a TCPDUMP of my connection on Airport (en1) using Google DNS 8.8.8.8 (but if I use my ISP DNS it still does this):
11:54:45.524180 ARP, Request who-has 192.168.1.104 tell 192.168.1.1, length 28
11:54:45.524269 ARP, Reply 192.168.1.104 is-at 00:22:41:f9:27:e7 (oui Unknown), length 28
11:55:14.273259 IP 192.168.1.104.50470 > iw-in-f103.1e100.net.https: Flags [F.], seq 1, ack 4294965572, win 65535, options [nop,nop,TS val 31991140 ecr 745959806,nop,nop,sack 1 {4294966990:0}], length 0
11:55:14.349839 IP iw-in-f103.1e100.net.https > 192.168.1.104.50470: Flags [R], seq 4200800152, win 0, length 0
11:55:14.648516 IP 192.168.1.104.59886 > google-public-dns-a.google.com.domain: 33436+ A? en.wikipedia.org. (34)
11:55:14.657939 IP 192.168.1.104.57695 > google-public-dns-a.google.com.domain: 47825+ AAAA? en.wikipedia.org. (34)
11:55:14.733680 IP google-public-dns-a.google.com.domain > 192.168.1.104.59886: 33436 3/0/0 CNAME rr.wikimedia.org., CNAME rr.pmtpa.wikimedia.org., A 208.80.152.2 (100)
11:55:14.737110 IP google-public-dns-a.google.com.domain > 192.168.1.104.57695: 47825 2/1/0 CNAME rr.wikimedia.org., CNAME rr.pmtpa.wikimedia.org. (135)
11:55:14.737165 IP 192.168.1.104 > google-public-dns-a.google.com: ICMP 192.168.1.104 udp port 57695 unreachable, length 36
11:55:14.821208 IP 192.168.1.104.50471 > rr.pmtpa.wikimedia.org.http: Flags [S], seq 3597359122, win 65535, options [mss 1460,nop,wscale 3,nop,nop,TS val 31991146 ecr 0,sackOK,eol], length 0
11:55:14.883842 IP rr.pmtpa.wikimedia.org.http > 192.168.1.104.50471: Flags [S.], seq 1708330874, ack 3597359123, win 5792, options [mss 1460,sackOK,TS val 2552235245 ecr 31991146,nop,wscale 9], length 0
11:55:14.883938 IP 192.168.1.104.50471 > rr.pmtpa.wikimedia.org.http: Flags [.], ack 1, win 65535, options [nop,nop,TS val 31991146 ecr 2552235245], length 0
11:55:14.884271 IP 192.168.1.104.50471 > rr.pmtpa.wikimedia.org.http: Flags [P.], seq 1:379, ack 1, win 65535, options [nop,nop,TS val 31991146 ecr 2552235245], length 378
11:55:14.945929 IP rr.pmtpa.wikimedia.org.http > 192.168.1.104.50471: Flags [.], ack 379, win 14, options [nop,nop,TS val 2552235251 ecr 31991146], length 0
11:55:15.071277 IP 192.168.1.104.60681 > google-public-dns-a.google.com.domain: 34531+ PTR? 2.152.80.208.in-addr.arpa. (43)
11:55:15.164792 IP google-public-dns-a.google.com.domain > 192.168.1.104.60681: 34531 1/0/0 PTR rr.pmtpa.wikimedia.org. (79)
11:55:15.247579 IP rr.pmtpa.wikimedia.org.http > 192.168.1.104.50471: Flags [P.], seq 1:529, ack 379, win 14, options [nop,nop,TS val 2552235277 ecr 31991146], length 528
11:55:15.247664 IP 192.168.1.104.50471 > rr.pmtpa.wikimedia.org.http: Flags [.], ack 529, win 65535, options [nop,nop,TS val 31991150 ecr 2552235277], length 0
11:55:19.730376 IP 192.168.1.1.ssdp > 239.255.255.250.ssdp: UDP, length 271
Now that's me (192.168.1.104) and my router (192.168.1.1) trying to connect to en.wikipedia.org without success.
Any help here would be great, especially since I'm not alone.
Matt

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Keep pinging something to keep the connection:
Temporary workaround that works for some:
As soon as you connect to your wireless network, Open Terminal and start a ping going. Use your router IP address; but any local address will do:
If your router has an IP address of 10.10.10.1, then open Terminal (in your Applications ---> Utilities folder) and type;
ping 10.10.10.1 <return>
You'll see a string that looks like:
64 bytes from 10.10.10.1: icmp_seq=728 ttl=64 time=1.527 ms
64 bytes from 10.10.10.1: icmp_seq=729 ttl=64 time=1.513 ms
64 bytes from 10.10.10.1: icmp_seq=730 ttl=64 time=1.203 ms
64 bytes from 10.10.10.1: icmp_seq=731 ttl=64 time=1.684 ms
64 bytes from 10.10.10.1: icmp_seq=732 ttl=64 time=1.063 ms
Your routers adress can be found under:
system preferences > network > airport > advanced... > TCP/IP
This keeps the connection active. It even survives sleep/wake.
I think people using this work around have it running all the time. But in your case you could start when you leave your computer. I think it you stop when you close that terminal window (I suppose there is a stop ping command I should look up).

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Volumes are mounted from teh NAS via NFS.
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But then there was the need to rebuild the iTunes biliothek on the MacBook Pro which uses WLAN (connected to the SMC). For some time the connection worked but then the connection to the server (NAS using NFS) was lost. I tried it with cable an without (10.3.9 and 10.4.8). The same problem occured.
I tried to transfer different kind of files and folders an identified some files which seemed to cause the server losses. Always at the exact same point. But I had to learn that theses points differ whether I connect via the SMC or the Fritzfon. I have to say that the connection via the Fritzfon are somewhat more stable.
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It's even possible that the server or the SMC becomes unresponsible via telnet so I have to restart it by pressing the reset-button.
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For 18 months I've had WiFi at my home and I connect my MacBook (OS X 10.5.6), my iPod Touch; my daughter connects a PC running Vista! I used to be able to connect my PBG4-12" running Tiger 10.4.11 - but today I was trying to connect and it doesn't even see my WiFi - even right next to it in the same room!
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I type in the name and password-- nope, nothing! I turn Airport off and then try the cable and perfect-- I'm on the www but not with "WiFi".
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Thanks for any suggestions on what to do here.
Best regards,
Steve Schulte
Tuesday 7 April 2009 at 17:56

Hello -- Good questions but I'll need help in order to answer them.
I have a D-Link WiFi Modem - DIR-635- Dec 2007 purchase, and here's some info from the 90 page manual:
Combines award winning router features and Draft 802.11n wireless technology to provide the best wireless performance.
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802.11b standard, so it can connect with existing 802.11b PCI, USB and Cardbus adapters.
Would a Dec 2007 iPod Touch 1st Gen be on WiFi 'n'? How to check?
How to find the channel on which the WiFi is broadcasting?
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Steve

Airport Loses Connection

Hi,
ive been having this problem for a while now and ive been trying loads of different things to fix it to no avail...
I have a NETGEAR rangemax 240 router to where my good old macbook pro's airport connects to. when i leave my computer alone and then the screen saver, then the screen turns off, after a while the connection drops to the wireless network. about 2 months ago, this never used to happen. the connection would NEVER drop. now it seems to drop every time the computer's screen goes to sleep. the computer is alway running, and never actually turns off or goes to sleep. only the screen sleeps. it seems like if the screen sleeps for about an hour or 2 then the airport connection drops. the only way to get it to come back it to select the airport icon at the top and choose my NETGEAR network again. this is really annoying as i need to stay permanently online.
what i have tried:
1. restarting the computer
2. deleting old network profile and creating a new one
3. putting airport at top of network list in system prefs
4. changing network ssid
5. deleted keychain WPA personal and manually connection to network again and then saving the password
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I think you need to wait for a fix from Apple on the Intel/Book/Wireless problem... or use an unencrypted connection.:-(
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Mac G5 drops/loses connection to Airport Extreme wireless base station

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Also, when I connect the router directly (hardwire) to the G5 it works fine.
The router is a new Siemens Speedstream 4100 (this is also a replacement for the original router).
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I would greatly appreciate any suggestions.
Thank you,
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Recently had a similar problem connecting a friend's PC to my network and thought I would post my fix in order to hopefully help others.
I noticed that everything worked fine when I disabled wireless security, so my problem was a security issue.
I re-enabled security on my router and copied down the first actual HEX key (key 1) instead of just using the password. Then, on the laptop with a Netgear wireless card, instead of selecting to type a password, I opted to use a network key and pasted the actual key, and it worked like a charm.
Maybe it has something to do with aftermarket network cards, but it solved the "network did not assign a network address" problem.
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same problem here.
MBA (latest os), even my ip5 (latest ios) & ipm (also latest ios) looses the connecntion.
Ive tried to figure out what causes the problem - neither my xbox360 nor (and i guessed they will be the problem) the pcs here...
the connecntion runs well.. switching also (MBA-IP5-IPM).. but not for longer than an hour.. or even minutes. When the connection looses a high-frequency noise is followed by silence. A restart fix that problem and all devices streaming well... but not for long...
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Might be the session limitation or Interference or Router IOS issue.
Needs to check the logs for clarifying the problem and to check why clients are not getting associated.
Are your clients getting the proper signal when they are not getting associated?

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We have our computer network online using an airport extreme (about 4 years old), we also have an airport express that helps to extend our network. We have an issue with the airport regularly dropping our internet signal, basically it just goes offline for no apparent reason and due to the history I'm pretty sure it is the airport and not our cable modem.
To correct this problem I usually just unplug the airport and unplug the cable modem and this usually resolves the problem. I've had this problem in the past, and it got to the point where this no longer fixed the problem. I brought the airport to a mac genius bar and they reset it back to factory settings and that resolved the problem for about two months. Then the problem came back again, and the airport would drop our signal 5+ times a day. Someone suggested changing the channel on which the airport sends its signal. That seemed to help at first, some channels better than others, but again, each channel would lose the signal after a few days and we'd have to go on to resetting it. It's been working reasonably well on channel 8, but not it's gone back to dropping our signal at least once a day, if not 3-4 times a day.
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Try using iStumbler's Inspector feature (select Edit > Inspector from iStumbler's menu) to determine the Signal-to-Noise Ratio (SNR) at different points around your house, by performing a simple RF site survey. Within the Inspector, note the values for "signal" & "noise" at these locations. This would be better done if you can use a laptop. Start with the laptop near the base station, note the readings, and then, choose the locations where you will typically use your computers to access the Internet.
SNR is the signal level (in dBm) minus the noise level (in dBm). For example, a signal level of -53dBm measured near an access point and typical noise level of -90dBm yields a SNR of 37dB, a healthy value for wireless LANs.
The SNR, as measured from the laptop, decreases as the range to the base station increases because of applicable free space loss. Also an increase in RF interference from microwave ovens and cordless phones, which increases the noise level, also decreases SNR.
SNR Guideline
o 40dB+ SNR = Excellent signal
o 25dB to 40dB SNR = Very good signal
o 15dB to 25dB SNR = Low signal
o 10dB to 15dB SNR = Very low signal
o 5dB to 10dB SNR = No signal
If the SNR is 20dB+ at each of these locations, then you should be getting reasonable performance from your AirPort. If less, either try to locate the source of the Wi-Fi interference or try relocating either the base station or the wireless clients until they are within a 20dB SNR range.

PowerBook G4 17" Airport loses connection to Airport Extreme

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