Ubuntu Networking :: Slow Lookup Of Web Sites
Nov 9, 2010
For a while now I've got a problem when surfing the internet. Everythings fine for let's say 15 minutes and then all of a sudden it takes about 1 minute to load a -random- page, once it has loaded, everthing's fine again. Transmission does not seem to have this problem. I'll double check this. Looking thru the forum I found the following "solutions". None of which has worked for me up to now:
- disable ipv6 in firefox
- set method under network manager to "Automatic (DHCP) addresses only" and use google or OpenDNS dns servers
- change resolv.conf (comparable to the second one I guess)
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Jun 4, 2011
I just installed Ubuntu 11.04 in a dual boot environment on a spare laptop( Dell Inspiron 6000 ) I have other machines using older distro's of Ubuntu but do not have them all on line... utility costs are ridiculous here..anyway.... I found some optimization tips for Firefox and those have been done and I did find earlier information about this or a very similar problem but all the suggestions mentioned there are already in place here network wide.. Basically what is happening is this: When a web site is opened from the browser in the lower left hand of the screen it displays "Looking up www.google.com" or what ever url was entered.
I know Win is not a good comparison and I haven't gotten any additional Ubuntu boxes on line yet but Win seem unaffected by this.
Any recommendations as to what I should try next?? I have DNS server information stored in the router using Google Public DNS and Open DNS as a backup and uPNP is disabled. Seems like the program (Ubuntu) is plenty fast even on this Celeron based machine but the time taken to look up DNS data is a lot slower than anticipated.
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Feb 9, 2011
In the past week or so I've noticed some weird network behaviour. I find accessing some sites such as Amazon, Paypal, and Bigstockphoto really slow. Sometimes the page will not load at all. Other sites are fine. The problem sites are not a problem for others on my LAN at home. When I try to open the problem sites, I can see in Firestarter blocked connections coming from 2.1(8/9).xxx.xxx on various ports such as 36007. This only happens for the problem sites. I attached a typical output from firestarter.
This happens with Firfeox or Chrome. Using Ubuntu 10.10
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Jul 8, 2011
I'm on Ubuntu 11.04 and have wired internet connection.
Some sites (particularly https) take very long time to load . Sometimes I get "Page is taking a long time to load . Reload the page later" message.
Now , this is happening for some http webpages also.
This is not a problem with browser.
I have firefox , chrome , chromium and konqueror installed.
Also I can access all these sites properly from windows so it is not problem with my internet connection either.
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Sep 7, 2010
I've been comparing the current Slackware 32 bit versus 64 bit, and I've noticed that the 64 bit version is as slow as dialup for domain name lookup.
The 32 bit version is very fast to find websites after a mouse click, whereas the 64 bit version takes forever looking up URLs. (using Firefox)
All the other 64 bit Linuxes seem to be the same way, not just Slackware.
The /etc/resolve.conf file is the same for 32 or 64 bit Slackware, but something is not right. The 32 bit version has a /etc/dhcpc directory, but not the 64 bit version.
Could this be causing the extreme slowdown?
It's really very irritating when the rest of the system is blazing fast.
AMD Phenom II X4 955
Asus M4A88TD-V
8 GB Corsair XM33 ram
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Mar 31, 2010
I've been cracking on with getting a new Slackware 13 x64 installation going. I've got a problem with browsing the net which I can't put my finger on.
When I try to access a site my machine spends a long time with the "Looking up www.website.com" message at the bottom. It can take 7-12 seconds before the site is found. Normally I would blame this on my ISP or connection but Mint, Debian and Windows XP aren't having this problem, they just zip straight to the site whether I've been to it before or not.
Is anybody aware of where the problem might be? It's not in the browser either because Opera, Seamonkey and Firefox all have the same problem issue.
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Jan 24, 2010
Why would this iptables cause this mail delivery error? I think it's to do with dns lookups not being routed properly... if remove the last rule, mail works fine.
ssh is also very slow to connect when the last rule is enabled.
postfix mail error:
Code:
Jan 24 11:32:18 xxxx postfix/smtp[15065]: 9F2162C519: to=<xxxxx@hotmail.com>, relay=none, delay=1005, delays=965/0.01/40/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again) iptables
[Code]....
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Mar 14, 2011
Yesterday I've installed Ubuntu 10.10 . Everything is fresh new but my I can feel some lack of speed in the desktop and sometimes if you look really hard on the monitor you can see that screen is trembling a little bit. Not long before, the system freeze up and I had to manually force reboot.
I think that the root of the evil might be the integrated graphics from Intel Core i5 2500K processor. What's your opinion ?
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Apr 27, 2011
I have just installed ubuntu 10.1 along side my windows xp. It installed nicely and boots up promptly. When I try to go to a web site, it takes forever to load. It can take up to 1 minute to load a page. Why is that. I thought that Linux was supposed to be faster. When I go back to windows, I don't have this problem.
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May 8, 2010
I am using lucid has anybody experience that Firefox is slow to open sites ?
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Aug 13, 2010
When i starts it for the first time,my sites getting loaded fast when requested through browser,but slows down gradually. what could be the reason, my cpu load seems ok. Because i have another site hosted through apache in the same server and its getting loaded fast. so what could be the issue.
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May 21, 2011
I've recently installed openSUSE 11.4 (64 bit) on my system and am experiencing severe performance issues with websites using https (any site using https). Page loads over https take anywhere between 30 seconds to 2 minutes. It's the same issue posted here Secure sites load slow or not at all -- there was no confirmed solution.
- My router/hardware configuration has not changed in a long time and I've run Ubuntu, Arch Linux, and Windows XP on the same machine within the last year and have not had any issues.
- I also have a laptop running Arch Linux (kernel 2.6.38) and this problem does not occur using Firefox 4 or Chrome. To add to the madness this problem occurs while running Firefox 4 inside a Windows 7 guest via virtual box, but NOT while running IE 8 inside the same guest.
- This issue occurs using Firefox 4, Chromium, Opera, Konqueror, and Arora.
- I've disabled ipv6 in Firefox via about:config.
- I've disabled ipv6 in yast and have attempted to use both the "ifup" and "networkmanager" options.
- I am not using a proxy server.
- I've attempted the fix posted in the Ubuntu forums for a similar problem [ubuntu] [SOLVED] Banking Site is very slow.
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Jan 14, 2011
I dual boot XP and FC14 and have 2 routers. I can connect and ping one of these routers when I'm in FC and I have an IP address I just can't load any websites. When I connect to the other router (my main router) it works fine. When I boot into XP and connect to the problem router I can load pages fine. It's only when I'm on FC14 and connect to the problem router that I can't load pages even though I have an IP and can ping around.
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Oct 23, 2009
I have the following bind9 configuration, and I'm trying to resolve reverse lookup IP address to name.
$ttl 38400
mydomain.org.INSOAmyhosting.com. (
1243281304
10800
[code]...
** server can't find 1.2.3.4.in-addr.arpa: NXDOMAIN
Is my PTR wrong, or what do I need to have the reverse lookup working ?
Note: I replace real IP by 1.2.3.4, same for my domain name.
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Jul 30, 2010
I have a problem in Eclipse for accessing update sites (for plugins). I am behind a NTLM proxy. Strangely, this proxy asks for a password while in Linux but not when in Windows�
To get around this annoying password issue, I already setup a working cntlmd proxy. I can use this proxy for mounting a remote DavFS2 share, for example. But the issue I have with Eclipse seems to involve proxy configuration. So I decided a transparent proxy could solve this issue. I installed tinyproxy on top of cntlmd, and added the following rule to the firewall:
Code:
iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to 8888
Now, I can configure Firefox for direct access to the Internet, and display a web site only if I give this web site's IP instead of its name! I surmise that it's because when configured for direct access, Firefox performs DNS lookups using the local (intranet) DNS, instead of squeezing its lookups through the proxy and accessing a broader DNS (I wonder which). How can I make all DNS lookups go transparently through the transparent proxy?
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Jun 3, 2011
I've got 2 domains:
[URL]
This is how I've configured my resolv.conf file:
[URL]
When I run the host command, it can resolve machines in one.domain.com using both hostname and ipaddress. But when I run the host command for machines in two.domain.com, it only works for hostnames but not ip addresses. The result for ip addresses is:
Host 100.3.2.1.in-addr.arpa not found: 3(NXDOMAIN)
Why doesn't it try the 2nd nameserver in the resolv.conf file when resolving by ip adddress? Reverse pointers are configured for each machine in their respective domain dns servers. O/S is Oracle VM Server 2.2.1 (similar to Red Hat). Kernel is 2.6.18-128.2.1.4.37.el5xen.
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Oct 12, 2010
I have a CentOS 5.5 desktop at work. I can browse the web (we are behind a proxy of course), I can use Yumex perfectly. In a word, every GUI has DNS working correctly. But, as soon as I use a terminal, either within a X session (xterm, konsole...) or in a tty, any DNS lookup will fail. So for instance, yum does not work as it complains about not being able to find the servers, wget doesn' t work... And if I try a nslookup, I get a NX Domain Fail. I feel like the servers are not doing recursion research when using command line nslookups, even if I "force" the option (adding it even if it is the default). Of course, resolv.conf is OK, host.conf as well...
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May 30, 2010
My sites on the server are loading very slow, though my server load is under 1.00.What can be the problem, when ever i restart httpd the sites starts to load instantly.
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Mar 15, 2010
I am running Ubuntu 9.04 32bit on a dual boot (XP) computer. No internet problems in windows, and I am currently typing this post on my wifes HP laptop running 9.10. I have no browsing ability on the desktop running 9.04, and updates don't work (in details, every other line fails) But, I can bring up Google, and search it, pictures and all, but cannot go to different sites (ebay, hotmail, amazon as the first few i try). Also, my pidgin works fine, as I am talking on it now. I have tried to turn off ipv6 in Firefox and ubuntu, neither doing anything noticeable.
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Mar 15, 2010
Its a single PC, I can ping my connection but I cant able to browse any sites..These are my outputs.
Code:
karthick@Learners-desktop:~$ ping -c 3 google.com
PING google.com (209.85.231.104) 56(84) bytes of data.
64 bytes from maa03s01-in-f104.1e100.net (209.85.231.104): icmp_seq=1 ttl=45 time=355 ms
64 bytes from maa03s01-in-f104.1e100.net (209.85.231.104): icmp_seq=2 ttl=45 time=355 ms
--- google.com ping statistics ---
3 packets transmitted, 2 received, 33% packet loss, time 2000ms
rtt min/avg/max/mdev = 355.239/355.534/355.830/0.665 ms
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Jan 22, 2011
I am using Ubuntu 10.04, when connected to the ethernet through , Atheros Communications AR8152 v1.1.I can successfully access the internet. But when I try to use the wireless I can connect to the network using Atheros Communications AR9285, but can't access any internet sites. Or ping any other devices on the network.I'm using an Acer Aspire One D260
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Sep 1, 2011
Strangest thing...yesterday my 11.04 box lost the ability to access anything external. I can ssh to the box from outside my network, and all other boxes on my network are fine, but this one box can't hit anything external. If I attempt to ping a site it's doing the same resolution, but no packets are delivered.
Up until yesterday it was running fine, and I didn't make any changes to my home network or install any updates. Totally stumped.
Edit: this is a wired connection with a static internal IP.
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Jan 10, 2010
With hardy, I was able to have multiple SSL sites on the one machine. But I can't seem to get it to work for ubuntu 9.10, I've read that you need to put each SSL site on a different IP. But I was able to do it with hardy without different IP's.
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Feb 2, 2009
I have an odd Linux problem. Changed ISP recently -- Windows NT4 & W95 work fine. Linux has worked fine on previous ISPs, but on the newest ISP, I can connect successfully on Linux, but can only communicate w/maybe one out of 10 sites (Google, for ex.). Mostly I get "cannot connect to site". Some points:
-Linux is Slackware w/kernel build 2.4.26.
-No settings changed from Linux setup that worked fine on previous ISPs.
-/var/log/Log file says PPP connects via CHAP successfully & no problems..
-I don't see any similarity on the few sites I can connect to -- seems random.
-ISP is useless -- say they "don't support Linux".
-Using Firefox & Konqueror browsers.
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Jul 18, 2011
I need to block some websites and torrents on my LAN running on mostly WIndows XP pcs and a Windows 2008 domain controller. It's possible to block some sites using DNS in Windows Domain controller, but users have the rights to change DNS and bypass the rule. Editing HOSTS file doesn't workThen I tried using Avast antivirus Site Block feature, but that doesn't work on any browser except Mozilla. We have to use Epic and Mozilla Firefox.We can't use a dedicated hardware firewall due to budget constraints and the fact that we have multiple ADSL lines for internet. No single gateway.
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Apr 23, 2009
I have this annoying problem since day one.I am testing out Red Hat RHEL5, everything is fine except DNS look up.If I ping www.google.com, it doesn't work, ping ip address it all works;if I bring up browser, put www.google.com it doesn't work, can't find the name, however, simply put ip address there it works.My DNS seeting seems ok, and the DNS works from Windows box.
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Feb 17, 2010
I need to block some of my sites with SQUID Proxy. I added following lines to my SQUID configuration file but still the site remains unblocked.How to block it?acl blocksites url_regex yahoohttp_access deny blocksitesI have also tried saving some url & filter content in a file and edited configuration as follows,acl blocksites url_regex "/etc/squid/squid-block.acl"http_access deny blocksitesThe squid-block.acl file contents are.cricinfo.commp3
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Jan 20, 2011
I've installed 10.10 yesterday on my old HP Pavillion ze2000 as dual boot with windowsXP and the wireless was working normally, I've updated everything it asked to update, rebooted a few times due to some of the updates. Today when I turned it on it was connecting normally to the router, though when I opened mozilla or tried to ping the router IP on the network tools neither have worked. Couldn't open any site on mozilla or ping any ip although it says I'm connected to my wireless router as it would normally. When I open into the XP my firefox there works just fine.
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May 17, 2011
I had recently installed Ubuntu 11.04 (64-bit) and I have trouble loading websites. I use a DSL (PPPoE) connection from NetworkManager to connect to the internet. Some sites like this forum site, stack overflow, etc. do not load. Firefox 4 says 'loading...' and then finally times out. I can ping these sites though.
I tried 'wget stackoverflow.com' and Lynx both timed out. wget sends out a request and waits a long time for response before timing out. These sites load perfectly well on my Fedora 14 (64-bit) & Windows XP installations and both these OSes have Firefox 4. From this I assumed that this is not a problem with Firefox (or any other browser for that matter) but it has got something to do with the network configuration.
I faced the same problem with Ubuntu 10.04 too. I use a Dell Inspiron N5010.
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Jun 18, 2011
i have a dual boot PC with Linux and windows 7. I have observed that facebook chat doesn't work properly when i use linux. and some sites dont open quickly or dont open at all.But there is no such problem in windows. What to do?
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