KDE-Forum.org

Hallo to everybody,
Although I don't think it might be specifficaly KDE problem, somebody here may be able to give me an enllightement...
I have Debian Etch, I can connect to the Internet (using an ADSL modem with Eciadsl program) and I am connected indeed, I can ping, telnet (to port 80 too), lookup etc., here is a proof:

telnet google.com 80

Trying 209.85.135.104...
Connected to www.l.google.com.
Escape character is '^]'.

If I give the command "GET / HTTP/1.0", I get the following:

HTTP/1.0 302 Found
Location: http://www.google.it/
Cache-Control: private
Set-Cookie: PREF=ID=2b473b8a23266481:TM=1199939109:LM=11999391 09=VkUR-S-LP3Vjo6dl; expires=Sat, 09-Jan-2010 04:25:09 GMT; path=/; domain=.google.com
Content-Type: text/html
Server: gws
Content-Length: 218
Date: Thu, 10 Jan 2008 04:25:09 GMT
Connection: Close

But, no one my browser (Opera, Firefox, Konqueror, Galeon, Epiphany etc.) seems to see it. They are "connecing to" a web server... forever. In fact, their behavior looks like they are being redirected... to nowhere ("web sever found, waiting for a response", or something alike). But, if there actually is not any connection, they give me an error immediately. Nothing changes if I try IP address instead of URL. I can even send mail and Evolution can login to my POP account (and even see how many messeges there're), but, doesn't seem able to rethrieve them ("checking mail"... forever).
I am posting the outputs of some commands (route, ip route, netstat) in attachment. (Obviously, the first part of my IP is fake, as well as the computer and network names.)

On the other hand, I can, without any problems, browse my LAN's web (web server on another machine). And vice versa. But, the machine where I have the problem is supposed to be the Internet gateway, so I can't browse the Internet from LAN neither. I feel that the key issue is that I cannot receive any *larger* packages from Internet. I am connecting via an ADSL modem, and after negotiation I have MPU 1492. On ethernet I have 1500 (and that machine, beside an Internet address, have its local static address 192.168.0.1 of the network card).
Everything looks to me like there is some firewall and/or a proxy active, but, I am not able to find it and as long as I am aware of there shouldn't be an active firewall. What could it be!!!? I don't know how to play with iptables configuration (or something else, if it's something else).
Here is the list of running processes:
[list]
PID TTY TIME CMD
1 ? 00:00:00 init
2 ? 00:00:00 migration/0
3 ? 00:00:00 ksoftirqd/0
4 ? 00:00:00 events/0
5 ? 00:00:00 khelper
6 ? 00:00:00 kthread
9 ? 00:00:00 kblockd/0
10 ? 00:00:00 kacpid
87 ? 00:00:00 kseriod
125 ? 00:00:00 pdflush
126 ? 00:00:00 pdflush
127 ? 00:00:00 kswapd0
128 ? 00:00:00 aio/0
572 ? 00:00:00 khubd
1592 ? 00:00:00 udevd
2082 ? 00:00:00 kgameportd
2103 ? 00:00:00 kpsmoused
2350 ? 00:00:00 cqueue/0
2400 ? 00:00:00 jfsIO
2401 ? 00:00:00 jfsCommit
2402 ? 00:00:00 jfsSync
2454 ? 00:00:00 xfslogd/0
2455 ? 00:00:00 xfsdatad/0
2575 ? 00:00:00 kcryptd/0
2593 ? 00:00:00 exec-osm/0
2608 ? 00:00:00 block-osm/0
2669 ? 00:00:00 pciehpd_event
2712 ? 00:00:00 ata/0
2713 ? 00:00:00 ata_aux
2831 ? 00:00:00 ocfs2_wq
3004 ? 00:00:00 kmirrord
6012 ? 00:00:00 reiserfs/0
6044 ? 00:00:00 kjournald
6047 ? 00:00:00 kjournald
6050 ? 00:00:00 kjournald
6654 ? 00:00:00 portmap
6957 ? 00:00:00 syslogd
6963 ? 00:00:00 klogd
7019 ? 00:00:00 named
7033 ? 00:00:00 lwresd
7158 ? 00:00:00 postmaster
7299 ? 00:00:00 acpid
7327 ? 00:00:00 cupsd
7347 ? 00:00:00 dbus-daemon
7355 ? 00:00:03 hald
7356 ? 00:00:00 hald-runner
7371 ? 00:00:00 hald-addon-acpi
7408 ? 00:00:00 hald-addon-keyb
7431 ? 00:00:00 hald-addon-stor
7433 ? 00:00:00 hald-addon-stor
7738 ? 00:00:00 dhcdbd
7745 ? 00:00:00 NetworkManager
7776 ? 00:00:00 avahi-daemon
7777 ? 00:00:00 avahi-daemon
7784 ? 00:00:00 NetworkManagerD
7863 ? 00:00:00 exim4
7879 ? 00:00:00 lisa
7891 ? 00:00:00 netdaemon
7901 ? 00:00:00 atalkd
7912 ? 00:00:00 papd
7914 ? 00:00:00 afpd
7916 ? 00:00:00 cnid_metad
7929 ? 00:00:00 nfsd4
7930 ? 00:00:00 nfsd
7931 ? 00:00:00 nfsd
7932 ? 00:00:00 nfsd
7933 ? 00:00:00 nfsd
7934 ? 00:00:00 nfsd
7935 ? 00:00:00 nfsd
7936 ? 00:00:00 nfsd
7937 ? 00:00:00 nfsd
7938 ? 00:00:00 lockd
7939 ? 00:00:00 rpciod/0
7943 ? 00:00:00 rpc.mountd
7959 ? 00:00:00 inetd
7967 ? 00:00:00 pptpd
7971 ? 00:00:00 nmbd
7973 ? 00:00:00 smbd
7980 ? 00:00:00 slpd
7982 ? 00:00:00 smbd
7990 ? 00:00:00 sshd
7993 ? 00:00:00 swapd
7997 ? 00:00:00 uml_switch
8014 ? 00:00:00 winbindd
8020 ? 00:00:00 winbindd
8094 ? 00:00:00 xinetd
8127 ? 00:00:00 gdm
8133 ? 00:00:00 gdm
8136 tty7 00:01:47 Xorg
8139 ? 00:00:00 rpc.statd
8148 ? 00:00:00 rpc.idmapd
8171 ? 00:00:00 miniserv.pl
8190 ? 00:00:00 miniserv.pl
8216 ? 00:00:00 atd
8223 ? 00:00:00 cron
8262 ? 00:00:00 apache
8279 ? 00:00:00 apache-ssl
8350 tty1 00:00:00 getty
8351 tty2 00:00:00 getty
8352 tty3 00:00:00 getty
8353 tty4 00:00:00 getty
8354 tty5 00:00:00 getty
8355 tty6 00:00:00 getty
8520 ? 00:00:00 startkde
8568 ? 00:00:00 ssh-agent
8571 ? 00:00:00 dbus-launch
8572 ? 00:00:00 dbus-daemon
8600 ? 00:00:00 start_kdeinit
8601 ? 00:00:00 kdeinit
8604 ? 00:00:00 dcopserver
8606 ? 00:00:00 klauncher
8608 ? 00:00:02 kded
8613 ? 00:00:00 kwrapper
8615 ? 00:00:00 ksmserver
8616 ? 00:00:04 kwin
8618 ? 00:00:02 kdesktop
8620 ? 00:00:10 kicker
8625 ? 00:00:04 artsd
8627 ? 00:00:00 kaccess
8629 ? 00:00:00 konqueror
8631 ? 00:00:00 krandrtray
8632 ? 00:00:00 konqueror
8633 ? 00:00:02 nautilus
8636 ? 00:00:00 gconfd-2
8637 ? 00:00:00 kmix
8638 ? 00:00:02 netapplet
8641 ? 00:00:00 smb4k
8642 ? 00:00:00 konqueror
8643 ? 00:00:00 konqueror
8644 ? 00:00:00 kedit
8645 ? 00:00:00 kedit
8646 ? 00:00:00 konqueror
8647 ? 00:00:00 konqueror
8648 ? 00:00:00 konqueror
8649 ? 00:00:00 konqueror
8650 ? 00:00:00 konqueror
8651 ? 00:00:00 konqueror
8652 ? 00:00:00 konqueror
8653 ? 00:00:00 konqueror
8656 ? 00:00:00 bonobo-activati
8657 ? 00:00:00 kedit
8663 ? 00:00:00 gnome-vfs-daemo
8664 ? 00:00:00 knotify
8671 ? 00:00:00 winbindd
8672 ? 00:00:00 kedit
8688 ? 00:00:00 kedit
8689 ? 00:00:00 kedit
8691 ? 00:00:03 konsole
8695 ? 00:00:00 mapping-daemon
8697 ? 00:00:00 kgpg
8701 ? 00:00:00 kedit
8703 ? 00:00:00 kget
8704 ? 00:00:00 kedit
8706 ? 00:00:00 kedit
8707 ? 00:00:00 evolution-alarm
8716 pts/0 00:00:00 bash
8719 ? 00:00:01 evolution-data-
8734 ? 00:00:00 klipper
8748 ? 00:00:00 korgac
8752 ? 00:00:00 kmail
9192 ? 00:00:00 apache
9193 ? 00:00:00 apache
9194 ? 00:00:00 apache
9195 ? 00:00:00 apache
9224 ? 00:00:00 gcache
9225 ? 00:00:00 apache-ssl
9256 ? 00:00:00 apache
9257 ? 00:00:00 apache-ssl
9258 ? 00:00:00 apache-ssl
9259 ? 00:00:00 apache-ssl
9260 ? 00:00:00 apache-ssl
9302 ? 00:00:00 dirmngr
9660 ? 00:00:00 kdesu
9661 ? 00:00:49 konqueror
9765 ? 00:00:20 konqueror
10866 ? 00:00:00 pppd
10911 ? 00:00:21 eciadsl-pppoeci
10974 ? 00:00:00 apache
11709 ? 00:00:00 kio_uiserver
12059 ? 00:00:00 kio_file
12097 ? 00:00:00 smbd
12393 ? 00:00:00 kio_thumbnail
12396 pts/0 00:00:00 ps
[/list]
I have 5 OS's on the machine that I use to connect to the Ineternat, but I am bound to use Win2K. Please, help me to use Debian!

Quoted

Originally posted by Ronald
Clearly an issue with your MTU, it's indeed too large. Packets that are too large cannot get out or in. You can use ping (e.g. ping -s 1000 -M do host.on.internet) to find your ideal MTU.

Here we are:

PING google.com (64.233.167.99) 1000(1028) bytes of data.
64 bytes from py-in-f99.google.com (64.233.167.99): icmp_seq=1 ttl=237 (truncated)
64 bytes from py-in-f99.google.com (64.233.167.99): icmp_seq=2 ttl=237 (truncated)
<->
64 bytes from py-in-f99.google.com (64.233.167.99): icmp_seq=91 ttl=237 (truncated)
64 bytes from py-in-f99.google.com (64.233.167.99): icmp_seq=95 ttl=237 (truncated)

--- google.com ping statistics ---
100 packets transmitted, 25 received, 75% packet loss, time 99001ms
rtt min/avg/max/mdev = 161.688/169.813/176.118/2.963 ms

PING google.com (64.233.167.99) 1500(1528) bytes of data.
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)
<->
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)

--- google.com ping statistics ---
0 packets transmitted, 0 received, +100 errors

PING google.com (72.14.207.99) 1492(1520) bytes of data.
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)
<->
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)

--- google.com ping statistics ---
0 packets transmitted, 0 received, +100 errors

PING google.com (64.233.187.99) 1472(1500) bytes of data.
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)
<->
From my.host.name-dynamic-at.my.isp.server.xyz (12.34.56.78) icmp_seq=1 Frag needed and DF set (mtu = 1492)

--- google.com ping statistics ---
0 packets transmitted, 0 received, +100 errors


PING google.com (64.233.187.99) 1464(1492) bytes of data.
64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=2 ttl=238 (truncated)
64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=3 ttl=238 (truncated)
<->
64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=99 ttl=238 (truncated)
64 bytes from jc-in-f99.google.com (64.233.187.99): icmp_seq=100 ttl=238 (truncated)

--- google.com ping statistics ---
100 packets transmitted, 85 received, 15% packet loss, time 99032ms
rtt min/avg/max/mdev = 171.169/178.878/187.946/3.679 ms


PING google.com (64.233.187.99) 560(588) bytes of data.
<->
--- google.com ping statistics ---
100 packets transmitted, 89 received, 11% packet loss, time 99007ms
rtt min/avg/max/mdev = 154.927/164.216/169.351/3.554 ms

PING google.com (72.14.207.99) 1112(1140) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 93 received, 7% packet loss, time 103306ms
rtt min/avg/max/mdev = 154.223/158.716/167.725/3.828 ms

PING google.com (64.233.167.99) 1116(1144) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 80 received, 20% packet loss, time 99001ms
rtt min/avg/max/mdev = 164.964/170.912/180.107/3.180 ms

PING google.com (64.233.187.99) 1120(1148) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 85 received, 15% packet loss, time 99004ms
rtt min/avg/max/mdev = 166.250/173.212/179.184/3.235 ms

PING google.com (64.233.187.99) 1124(1152) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 97 received, 3% packet loss, time 99005ms
rtt min/avg/max/mdev = 165.773/172.791/179.118/3.425 ms

PING google.com (64.233.187.99) 1128(1156) bytes of data.
--- google.com ping statistics ---
100 packets transmitted, 82 received, 18% packet loss, time 99003ms
rtt min/avg/max/mdev = 165.230/172.004/179.539/3.236 ms

(I've omitted some less significant results)

Well, it seems we're much closer ro the solution now (I hope). But, Sir, could you teach me what should I do at this point? How to fix it? And on which interface(s)? ADSL for Internet, or ethernet card for LAN, or both? What do yiu think would be the best vallue? (And why do I never have 100%?) BTW, what does it mean "ttl=237 (truncated)"?

Quoted

Originally posted by Ronald
You can fix the problem of a MTU that is too large by using ifconfig. Set it lower for the interface your ADSL modem is connected to on the other end, something like ifconfig eth0 mtu 1464. The best value for this would be the largest ping packet without the 'Frag needed and DF set'-message. However, I can't see why your high MTU is causing packet loss, this must be a completely different problem

I don't know what truncated means, sorry. Maybe someone else has a clue on this?

I was almost sure it was that. But, I've already gave a try (not just one try) and - allways the same (well, maybe it still doesnìt neccessarely mean that the problem is not that). Sorry, either I haven't understood you completely, or you missed something from my posts. Eth0 is my LAN card, my ADSL modem is not eth0, it's not eth at all - it's an USB modem, not an ethernet device. And rather probbabely that is the most tricky thing. Its driver (eciadsl) works in user space, it doesn't belong to the standard Linux configuration, it isnt a pppd, it isn't an eth device, wlan etc. Its name in /etc/network/interfaces is something like "ppp-eciadsl" (I'm not sure if this is the exact name, since I'm not at that system right now, but, it's something very alike). But, if you try to call that device in ip program (for example) - "the device does not exist". When it's connected, it generates ppp0, but, it can also be ppp1, or ppp2, or ppp...x (for example, if the connection brakes and it calls again). Its parameters like MTU are being established dinamically and trying from command line doesn't seem to have an effect (as soon as it reconnects, it's 1492 again). I was able to reduce the vallue by changing it in some configuration files (and rebooting), but, I am not sure if it was enough (although ifconfig would say, for example, MTU=1432). I've tried 1464, 1452, 1448, 1432, 1404, 1140, 1120... nothing! Also, does it matter what MTU vallue an (local) ethernet card has in rellation to MTU on the Interent device. Although, I've tried to play with that, too, to make it equal, or smaller - no luck. But, if you still believe it be something about MTU, or, maybe, some other network parameters, maybe I should try again my modem's forum (it would make little sense to post there, if it's something about firewall, tunneling or similar) Anyway, thank you for your efforts.