Some websites won't connect/load

AquaFox · 2010-07-10 08:32:54

I dual boot with Arch. On Windows I can visit ekiga.net just fine. On Linux, when I type ekiga.net on the address bar the page will not load and Chrome will show the loading animation for a while and nothing would happen.

You probably need more information, tell me what you need and I'll give it to you. I'd really like help, I use Ekiga regularly.

Thank you.

Sin.citadel · 2010-07-10 08:49:48

show your windows settings, default route, and dns settings. as well as linux settings, default route and dns.

have you tried using any other browser, also, can you ping ekiga.net show what ip address is it resolving to.

AquaFox · 2010-07-10 09:03:08

Okay.. I hope I'm giving you enough.

I'm using an ADSL router that connects to the internet. Its address is 192.168.1.1. It is set to automatically find DNS servers.

A traceroute for ekiga.net gives me this:

$ traceroute ekiga.net
traceroute to ekiga.net (86.64.162.35), 30 hops max, 40 byte packets
 1  192.168.1.1 (192.168.1.1)  0.411 ms  0.430 ms  0.347 ms
 2  as22-123.omantel.net.om (212.72.16.250)  15.671 ms  14.005 ms  16.010 ms
 3  * * *
 4  62.231.254.178 (62.231.254.178)  35.083 ms  18.947 ms  21.402 ms
 5  62.231.253.90 (62.231.253.90)  17.529 ms  16.442 ms  16.512 ms
 6  62.231.253.145 (62.231.253.145)  20.693 ms  23.080 ms  17.480 ms
 7  pos15-0.cr05.ash01.pccwbtn.net (63.218.44.33)  361.642 ms  245.296 ms  266.203 ms
 8  pos1-1.br02.ash01.pccwbtn.net (63.218.44.190)  212.970 ms  213.900 ms  318.189 ms
 9  cogent.tenge13-4.br02.ash01.pccwbtn.net (63.218.92.14)  218.171 ms  210.700 ms  209.997 ms
10  te0-0-0-2.mpd22.iad02.atlas.cogentco.com (154.54.31.165)  210.072 ms te0-2-0-2.mpd22.iad02.atlas.cogentco.com (154.54.31.169)  204.133 ms te0-1-0-6.mpd22.iad02.atlas.cogentco.com (154.54.31.213)  209.498 ms
11  te0-2-0-7.mpd22.par01.atlas.cogentco.com (154.54.28.186)  289.155 ms te0-3-0-7.mpd22.par01.atlas.cogentco.com (154.54.28.190)  287.203 ms  289.607 ms
12  te7-1.ccr01.par02.atlas.cogentco.com (130.117.2.109)  392.193 ms  211.433 ms te4-8.ccr01.par02.atlas.cogentco.com (130.117.50.254)  211.994 ms
13  149.6.114.94 (149.6.114.94)  287.614 ms deviant-network.demarc.cogentco.com (149.6.162.18)  288.655 ms  287.633 ms
14  V3850.nts1-co-1.gaoland.net (84.96.251.129)  288.666 ms  288.396 ms  289.077 ms
15  84.96.243.74 (84.96.243.74)  288.667 ms  288.603 ms  291.636 ms
16  60.162.64-86.rev.gaoland.net (86.64.162.60)  291.571 ms  288.913 ms  298.939 ms
17  ekiga.net (86.64.162.35)  289.065 ms  289.620 ms  288.627 ms

This is my rc.conf:

#
# /etc/rc.conf - Main Configuration for Arch Linux
#

# -----------------------------------------------------------------------
# LOCALIZATION
# -----------------------------------------------------------------------
#
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime", any other value will result
#   in the hardware clock being left untouched (useful for virtualization)
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
#
LOCALE="en_US.UTF-8"
HARDWARECLOCK="localtime"
TIMEZONE="Asia/Muscat"
KEYMAP="us"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"

# -----------------------------------------------------------------------
# HARDWARE
# -----------------------------------------------------------------------
#
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MOD_BLACKLIST: Prevent udev from loading these modules
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
#
# NOTE: Use of 'MOD_BLACKLIST' is deprecated. Please use ! in the MODULES array.
#
MOD_AUTOLOAD="yes"
#MOD_BLACKLIST=() #deprecated
MODULES=(fuse snd-pcm-oss)

# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"

# -----------------------------------------------------------------------
# NETWORKING
# -----------------------------------------------------------------------
#
# HOSTNAME: Hostname of machine. Should also be put in /etc/hosts
#
HOSTNAME="Necronomicon"

# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available interfaces.
#
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
#   - prefix an entry in INTERFACES with a ! to disable it
#   - no hyphens in your interface names - Bash doesn't like it
# 
# DHCP:     Set your interface to "dhcp" (eth0="dhcp")
# Wireless: See network profiles below
#

#Static IP example
#eth0="dhcp"
eth0="dhcp"
wlan0="dhcp"
INTERFACES=(!eth0 !ath0 !wlan0)

# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
#   - prefix an entry in ROUTES with a ! to disable it
#
gateway="default gw 192.168.0.1"
ROUTES=(!gateway)
 
# Enable these network profiles at boot-up.  These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
#   - set to 'menu' to present a menu during boot-up (dialog package required)
#   - prefix an entry with a ! to disable it
#
# Network profiles are found in /etc/network.d
#
# This now requires the netcfg package
#
#NETWORKS=(main)

# -----------------------------------------------------------------------
# DAEMONS
# -----------------------------------------------------------------------
#
# Daemons to start at boot-up (in this order)
#   - prefix a daemon with a ! to disable it
#   - prefix a daemon with a @ to start it up in the background
#
DAEMONS=(syslog-ng !network netfs @crond dbus hal @fam @networkmanager @alsa @laptop-mode @preload)

And my resolv.conf:

# Generated by NetworkManager
nameserver 192.168.1.1

I am using Chromium as my browser. Tried on Firefox and same problem happens. On Firefox it says "connected to www.ekiga.net" and it stays that way for a while.. then it works and loads the page. It seems to be Chromium's fault, the bottom left of the browser says "waiting for cache..." and stays that way. On Google Chrome on Windows it still loads much faster than on Firefox on Linux. On Firefox the network settings is "use system proxy settings" and on Chromium it is "Direct Internet Connection". This problem isn't only to ekiga.net but when browsing reddit similar website-not-loading problems happens to links I stumble upon. I still think it is a networking issue and not only a Chromium one. I get the problem of not registering my sip on Ekiga Softphone software and I'm assuming this is due to the connection.

What do you need to know about my Windows settings?

Last edited by AquaFox (2010-07-10 09:04:15)

R00KIE · 2010-07-10 12:46:01

Wild guess: try to edit your /etc/resolv.conf and use this:

nameserver 8.8.4.4
nameserver 8.8.8.8

Reopen your browser and try again. If things work smoothly the problem is with your ISP's DNS servers. If it is still slow then no idea.

AquaFox · 2010-07-10 19:48:32

Still slow

R00KIE · 2010-07-10 20:40:26

Just remembered something else, try 'lsmod | grep ipv6' if you have some output then follow the procedures described in the wiki [1] to disable IPv6 and try again.

[1] http://wiki.archlinux.org/index.php/IPv … the_Module

AquaFox · 2010-07-11 05:24:03

Disabled. Still slow .

Gusar · 2010-07-11 08:44:38

Set the MTU of your network card to 1492.

AquaFox · 2010-07-12 05:32:13

# ifconfig eth0 mtu 1492
# ifconfig | grep MTU
          UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
          UP LOOPBACK RUNNING  MTU:16436  Metric:1

Still hangs at "waiting for cache" .

AquaFox · 2010-07-19 10:29:05

Gusar wrote:

Set the MTU of your network card to 1492.

Is there any rationale behind this?

R00KIE · 2010-07-19 22:27:03

AquaFox wrote:

Gusar wrote:
Set the MTU of your network card to 1492.
Is there any rationale behind this?

Yes there is, although I'm not sure if lowering it to 1492 is enough. Do a search for "router black hole" and you will find ways to check if that is affecting you, and if it is, which MTU value to use.

Another thing that I remember seeing (but never affected me so I never looked to much into it) is something about automatic (tcp?) window scaling, it is or used to be enabled by default and with some hardware combinations it caused problems.

Someone that knows more about this should be able to confirm or deny this because I'm not too sure about it (search the forums and google and I guess you will find something).

It may not be a problem on your side, it may be a temporary routing issue that you can't control.

hokasch · 2010-07-20 08:02:29

Another wild guess: Firewall settings. I had weird connectivity problems on a specific network, sometimes sites won't load, but without any pattern. It was caused by the router's intrusion detection, upping the "Maximum incomplete TCP/UDP sessions number from same host" solved it. Check if you get any "**SYN Flood to Host**" errors in the router log.

AquaFox · 2010-07-20 08:13:50

My firewall is off and no SYN Flood to Host .

Gusar · 2010-07-24 11:03:02

AquaFox wrote:

Gusar wrote:
Set the MTU of your network card to 1492.
Is there any rationale behind this?

Yes. ADSL, or pppoe to be exact. I've read that ethernet frames are 1500 (the default MTU), but pppoe has overhead. I had exactly the same problem as you, some sites would load, others wouldn't. Setting MTU to 1492 fixed it. Another option, that I haven't tried yet, is a firewall rule, let me find it...

iptables -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

You set this on the router and that way you don't need to mess with MTU on the clients.

Hmm, a quick google on 'pppoe overhead' finds this: http://www.mynetwatchman.com/kb/ADSL/pppoemtu.htm, which suggest setting MTU to 1454.

Sjoden · 2010-08-03 23:46:06

Sorry to resurect this thread, but I remember how frustrating it was, I can also confirm this. I had the exact same problem when I had DSL. Wish I would have found this information back then.

KrimReaper · 2011-11-08 20:21:43

I was having an issue just recently where I could not load some websites. I found this thread and decided to change my MTU which seems to have solved the problem. Only thing is I am not using DSL but Cable. I have no idea why this issue all of a sudden happen. Can anyone shed some light on this ?

scar · 2012-01-13 22:40:33

Is that kind of a Coaxial Cable Modem?

If this is the case, it is pretty much the same thing, but maybe you have received just a (buggy?) firmware upgrade or your Internet Provider has changed something on his CMTS.
I work for a cable net provider, and we already had this problem. It was a faulty firmware upgrade.

TheLemonMan · 2012-06-28 14:48:25

Sorry to resort an old topic but I'm having the same issue, I'm unable to open some sites such as kippt.com or facebook. The problem seems to be in some http(s) request that never complete. I already tried the solutions above but no luck, already disabled the tcp window and set the mtu on both the pc and the router to 1492.

brebs · 2012-06-28 15:06:27

TheLemonMan wrote:

set the mtu on both the pc and the router to 1492.

Check that this succeeds:

ping -s 1464 -M do www.dslreports.com

TheLemonMan · 2012-06-28 15:22:19

brebs wrote:

TheLemonMan wrote:
set the mtu on both the pc and the router to 1492.
Check that this succeeds:
ping -s 1464 -M do www.dslreports.com

That works just fine, problems come if i do something like

 curl -v https://cdn.optimizely.com/js/5935064.js

or

 curl -v http://connect.facebook.net/en_US/all.js

(I stripped the urls from the webkit inspector that revealed that those request were pending)

brebs · 2012-06-28 15:37:52

Others to try:

echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
echo 1 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_be_liberal

TheLemonMan · 2012-06-28 15:43:28

No luck still, it did work before with vanilla settings so I don't think its related to the kernel tcp stack.

Arch Linux

#1 2010-07-10 08:32:54

Some websites won't connect/load

#2 2010-07-10 08:49:48

Re: Some websites won't connect/load

#3 2010-07-10 09:03:08

Re: Some websites won't connect/load

#4 2010-07-10 12:46:01

Re: Some websites won't connect/load

#5 2010-07-10 19:48:32

Re: Some websites won't connect/load

#6 2010-07-10 20:40:26

Re: Some websites won't connect/load

#7 2010-07-11 05:24:03

Re: Some websites won't connect/load

#8 2010-07-11 08:44:38

Re: Some websites won't connect/load

#9 2010-07-12 05:32:13

Re: Some websites won't connect/load

#10 2010-07-19 10:29:05

Re: Some websites won't connect/load

#11 2010-07-19 22:27:03

Re: Some websites won't connect/load

#12 2010-07-20 08:02:29

Re: Some websites won't connect/load

#13 2010-07-20 08:13:50

Re: Some websites won't connect/load

#14 2010-07-24 11:03:02

Re: Some websites won't connect/load

#15 2010-08-03 23:46:06

Re: Some websites won't connect/load

#16 2011-11-08 20:21:43

Re: Some websites won't connect/load

#17 2012-01-13 22:40:33

Re: Some websites won't connect/load

#18 2012-06-28 14:48:25

Re: Some websites won't connect/load

#19 2012-06-28 15:06:27

Re: Some websites won't connect/load

#20 2012-06-28 15:22:19

Re: Some websites won't connect/load

#21 2012-06-28 15:37:52

Re: Some websites won't connect/load

#22 2012-06-28 15:43:28

Re: Some websites won't connect/load

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