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#1 2009-10-13 12:46:24
- Pank
- Member
- From: IT
- Registered: 2009-06-13
- Posts: 371
Connection inconsistency in GNU/Linux
Hello,
I am having some trouble with some pages. At first I though it was some kind of DNS problem. However, I am not so sure anymore.
I have a Wippies modem. My ISP requires me to log into their network with PPPoA. However, PPPoA plus self-specified DNS is not an option with the Wippies modem. Thus, I specify the DNS on my computers.
I can, however, not connect to certain pages. I check the sides via nslookup and I can ping them but I cannot connect to them.
Here is an example
╭─[rasmus]
╰─[14:31:25]> nslookup netvibes.com
Server: 205.210.42.205
Address: 205.210.42.205#53
Non-authoritative answer:
Name: netvibes.com
Address: 193.189.143.34
╭─[rasmus]
╰─[14:31:32]> nslookup netvibes.com
Server: 64.68.200.200
Address: 64.68.200.200#53
Non-authoritative answer:
Name: netvibes.com
Address: 193.189.143.34
╭─[rasmus]
╰─[14:32:10]> dig 192.189.143.34
; <<>> DiG 9.6.1 <<>> 192.189.143.34
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 30060
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;192.189.143.34. IN A
;; AUTHORITY SECTION:
. 10800 IN SOA A.ROOT-SERVERS.NET. NSTLD.VERISIGN-GRS.COM. 2009101201 1800 900 604800 86400
;; Query time: 644 msec
;; SERVER: 205.210.42.205#53(205.210.42.205)
;; WHEN: Tue Oct 13 14:32:20 2009
;; MSG SIZE rcvd: 107
╭─[rasmus]
╰─[14:32:20]> ping netvibes.com
PING netvibes.com (193.189.143.34) 56(84) bytes of data.
64 bytes from 193.189.143.34: icmp_seq=1 ttl=241 time=36.9 ms
64 bytes from 193.189.143.34: icmp_seq=2 ttl=241 time=60.3 ms
64 bytes from 193.189.143.34: icmp_seq=3 ttl=241 time=36.8 ms
64 bytes from 193.189.143.34: icmp_seq=4 ttl=241 time=37.3 ms
64 bytes from 193.189.143.34: icmp_seq=5 ttl=241 time=36.6 ms
^C64 bytes from 193.189.143.34: icmp_seq=6 ttl=241 time=36.4 ms
--- netvibes.com ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 8282ms
rtt min/avg/max/mdev = 36.447/40.742/60.313/8.757 ms
╭─[rasmus]
╰─[14:32:39]> #for reference
╭─[rasmus]
╰─[14:32:53]> ping google.com -c 3
PING google.com (74.125.53.100) 56(84) bytes of data.
64 bytes from pw-in-f100.google.com (74.125.53.100): icmp_seq=1 ttl=45 time=197 ms
64 bytes from pw-in-f100.google.com (74.125.53.100): icmp_seq=2 ttl=45 time=198 ms
64 bytes from pw-in-f100.google.com (74.125.53.100): icmp_seq=3 ttl=45 time=198 ms
--- google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2221ms
rtt min/avg/max/mdev = 197.609/198.252/198.884/0.731 ms
╭─[rasmus]
╰─[14:33:03]> traceroute netvibes.com
traceroute to netvibes.com (193.189.143.34), 30 hops max, 40 byte packets
1 192.168.0.1 (192.168.0.1) 0.968 ms 1.840 ms 1.077 ms
2 loop0.mxc1-aalx.ip.cybercity.dk (212.242.2.159) 6.815 ms 5.953 ms 5.403 ms
3 ae1-10.mcr1-aalx.ip.cybercity.dk (212.242.8.33) 5.498 ms 5.646 ms 8.675 ms
4 ae10-0.mcr1-soex.ip.cybercity.dk (212.242.8.49) 11.665 ms 11.451 ms 11.150 ms
5 ae1-0.br1-soex.ip.cybercity.dk (212.242.6.178) 11.298 ms 13.553 ms 11.062 ms
6 ti6000b300-ae2-0.ti.telenor.net (148.122.9.37) 14.373 ms 12.658 ms 11.226 ms
7 213.242.108.13 (213.242.108.13) 13.370 ms 11.614 ms 11.302 ms
8 4.69.142.170 (4.69.142.170) 22.985 ms 22.780 ms 22.915 ms
9 ae-2-2.ebr2.Frankfurt1.Level3.net (4.69.132.138) 26.858 ms 26.442 ms 26.666 ms
10 ae-62-62.csw1.Frankfurt1.Level3.net (4.69.140.18) 31.211 ms ae-82-82.csw3.Frankfurt1.Level3.net (4.69.140.26) 37.259 ms ae-92-92.csw4.Frankfurt1.Level3.net (4.69.140.30) 30.027 ms
11 ae-81-81.ebr1.Frankfurt1.Level3.net (4.69.140.9) 26.952 ms ae-71-71.ebr1.Frankfurt1.Level3.net (4.69.140.5) 27.295 ms ae-91-91.ebr1.Frankfurt1.Level3.net (4.69.140.13) 42.584 ms
12 ae-2-2.ebr2.Paris1.Level3.net (4.69.141.233) 38.202 ms 35.784 ms 35.459 ms
13 ae-22-52.car2.Paris1.Level3.net (4.69.139.227) 37.878 ms 36.826 ms 39.561 ms
14 * * *
15 lb2.th2.fr.typhon.net (193.189.143.24) 37.654 ms 37.381 ms 36.680 msHere is another example:
╭─[rasmus]
╰─[14:34:41]> nslookup goodies.xfce.org
Server: 64.68.200.200
Address: 64.68.200.200#53
Non-authoritative answer:
Name: goodies.xfce.org
Address: 138.48.2.101
╭─[rasmus]
╰─[14:35:16]> ping goodies.xfce.org -c 3
PING goodies.xfce.org (138.48.2.101) 56(84) bytes of data.
--- goodies.xfce.org ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 1998ms
╭─[rasmus]
╰─[14:35:47]> traceroute goodies.xfce.org
traceroute to goodies.xfce.org (138.48.2.101), 30 hops max, 40 byte packets
1 192.168.0.1 (192.168.0.1) 0.997 ms 0.931 ms 0.916 ms
2 loop0.mxc1-aalx.ip.cybercity.dk (212.242.2.159) 8.281 ms 6.181 ms 7.634 ms
3 ae1-10.mcr1-aalx.ip.cybercity.dk (212.242.8.33) 4.708 ms 5.469 ms 5.407 ms
4 ae10-0.mcr1-soex.ip.cybercity.dk (212.242.8.49) 10.974 ms 14.385 ms 10.797 ms
5 ae1-0.br1-soex.ip.cybercity.dk (212.242.6.178) 10.564 ms 10.487 ms 10.085 ms
6 ti6000b300-ae2-0.ti.telenor.net (148.122.9.37) 10.859 ms 10.890 ms 10.832 ms
7 ti3004c310-ae1-0.ti.telenor.net (146.172.105.45) 26.388 ms 24.342 ms 24.372 ms
8 ti9000b300-ae0-0.ti.telenor.net (146.172.105.54) 23.143 ms 24.244 ms 23.307 ms
9 10ge.cr2.brueve.belnet.net (195.69.144.43) 27.098 ms 27.072 ms 27.921 ms
10 10ge.ar1.nam.belnet.net (193.191.17.174) 30.089 ms 30.382 ms 30.512 ms
11 193.191.12.69 (193.191.12.69) 29.128 ms 30.921 ms 30.767 ms
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
^CI have tried all thinkable fixes:
* I have tried OpenDNS and DNSresolvers.com
* I have tried to disable ipv6
* I have tried options single-request in my resolv.conf
* I have tried echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
* I have tried sysctl -w net.ipv4.tcp_timestamps=0
The only "work around" I can find is going through a proxy like hide-me-now.com.
This is /only/ a problem with Linux (I had the same problem with Zenwalk and Ubuntu (live cd)). With XP there is no problem.
I really hope somebody could help me out here.
Thanks,
Rasmus
Arch x64 on Thinkpad X200s/W530
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