Hi,

im using a UMTS USB Modem with Openwrt (Modem: Huawai E220). It connects without problems to vodafon i can also establish a stable vpn connection with it.

Following problems occur:

using wget for some page (like checkip.dyndns.org) gives a content-length is garbage error. looking at the tcp connection with wireshark shows that the connection stops before all the content is transmitted.

since there is only a problem with tcp connection the problem might be in the tcp configuration.

would be nice if anybody could give me a hint.

thanx

Can u tell me which openwrt version are you using??

Ive somethimes have had problems with the usbserials --- they only come up all 3(tty0 tty1 tty2) after stick the modem in and then rebooting the router ;(

thx

Hi,

im using Whiterussian 0.9.
But i dont think there is a problem with the usbserial since the connection is established at the point the problem occurs.
While trying the wget http://checkip.dyndns.org (which gives the content length is garbage error) i do have a working vpn connection other umts in parallel which doesn't show any problems at all. The problem also occurs only on a couple of websites for example www.yahoo.de works fine. So i think it is either a problem with wget or a problem with tcp ...

Another test showed that if i am connecting a computer to the box which uses the box as gateway calling the page in the browser of the computer will show no problems at all... will do wireshark dumps of both ways and compare them maybe that helps.

Thanx

i have no problems with that...

Maybe you check your pppd scripts?
and type in the dns in /etc/ppp/ ???

http://www.umtslink.at/3g-forum/showpos … ostcount=8

I have problems with the downloadrate its about 50kb on the router and 220 on a pc!
Any tips?

thx

did u try to use the command on the shell of the openwrt router not at any computer connected to it? for me it just doesnt work on the router...
i did use the how to u pointed at ...

for the speed: i will check on that but i dont have the router right now in front of me. i'm just using a vpn connecting to get remote access to it...

thx

ok installed iptraf on the router an here you go. so if you meant 50kbyte i do have the same, but i played around and dont know which network mode the modem is in right now...

? Incoming rates:     429.5 kbits/sec                                                                                                   ?
?                      55.4 packets/sec                                                                                                       ?
?                                            IP checksum errors:           0                                                               ?
? Outgoing rates:      56.8 kbits/sec                                                                                                    ?
?                      37.8 packets/sec

yeah i got the same results but don´t know why!
My modem led is green so i get hsdpa .....