<div dir="ltr">On Mon, Aug 4, 2008 at 6:18 AM, Andy Green <span dir="ltr"><<a href="mailto:andy@openmoko.com">andy@openmoko.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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</div><div class="Ih2E3d">Somebody in the thread at some point said:<br>
| Andy Green escreveu:<br>
|> Somebody in the thread at some point said:<br>
|> | I've configured WiFi on a fresh FSO image the same way I had on a<br>
2008.2<br>
|> | image--by creating a wpa_supplicant.conf file and editing<br>
|> | /etc/network/interfaces. This configuration worked on the 2008.2 image<br>
|> | but when I try implementing it on an FSO image, I cannot download<br>
|> | anything. I can ping sites and when using wget, I can connect to them,<br>
|> | but downloading never commences. It's not a DNS issue because ping and<br>
|> | wget seem to be able to resolve correctly. Any thoughts?<br>
|><br>
|> Sounds specific to tcp transport, ping is ICMP and DNS usually UDP.<br>
|> Maybe connect to a local Linux box and run tcpdump on there to study<br>
|> what it sees from the connection action.<br>
|<br>
| No, it's not "ping and DNS do not use TCP". It's "ping and DNS and TCP<br>
| SYN are small packets, data transfer is large packets", i.e. PMTU<br>
| blackhole. I've seen that thing happen way too many times, and the<br>
| workaround is almost always a MSS clamp (which is an ugly but<br>
| unfortunately necessary hack).<br>
<br>
</div>Well, he says it worked on some other image.<br>
<br>
The guy can test this by seeing if he has any bulk transfer with local<br>
machines on his side of his router.<br>
<br>
He can also mess with his ping payload size and confirm if that controls<br>
the issue...<br>
<br>
# ping -s 4096 <a href="http://192.168.0.1" target="_blank">192.168.0.1</a><br>
PING <a href="http://192.168.0.1" target="_blank">192.168.0.1</a> (<a href="http://192.168.0.1" target="_blank">192.168.0.1</a>) 4096(4124) bytes of data.<br>
4104 bytes from <a href="http://192.168.0.1" target="_blank">192.168.0.1</a>: icmp_seq=1 ttl=64 time=5.36 ms<br></blockquote><div><br> </div></div>I can wget files hosted on the local side of the router, cannot wget anything external. ping -s 4096 <a href="http://192.168.1.1">192.168.1.1</a> still works.<br>
<br>-- <br>Dylan<br><br>Type faster. Use Dvorak:<br><a href="http://dvzine.org">http://dvzine.org</a><br>
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