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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1 Linux SME Server 7.5 (Samba Server)
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