Resolving domain names in KDE apps
Hello, I'm a new FreeBSD user with a performance issue. I've installed 5.1R and KDE. I've also installed Phoenix from the ports collection. When I'm using Konqueror or Phoenix to browse certain web sites they take forever to load. It appears the problem is associated with resolving domain names. While I wait (minutes!) for a problematic page to load, Phoenix will report in the notices bar at the bottom Resolving host There's no CPU or network bottleneck and the problem is reproducable in either browser with the same web sites. It seems also to relate to situations where one web page calls another for part of the content (e.g., www.vancouversun.com tries to load from ad.ca.doubleclick.net). If I open up a shell window and ask FreeBSD to resolve the same domain names with host they resolve instantly. So the problem has something to do with the way the package for KDE talks with BSD. Any advice would be greatly appreciated! ...Robert -- Robert Froese, RPF Assistant Professor, Forest Biometrics School of Forest Resources and Environmental Science Mighigan Technological University, Houghton MI. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Resolving domain names in KDE apps
Hello Robert I have been using FreeBSD 5.1 RELEASE and Konqueror without any noticeable problems with speed or name resolution. The problem I have are related to browser issue: not haveing support for shockwave, scripting problems, and poorly develop sites that do not work well with the KHTML and Mozilla engines. The site you referenced does load slowly for me, but I think is do to the site and it is defiantly not a result of the operating system or KDE. The webpage does load some files form ad.ca.doubleclick.net see code below. TD width=468 height=60 valign=middle SCRIPT language=JavaScript1.1 SRC=http://ad.ca.doubleclick.net/N3081/adj/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;dcopt=ist;kw=van;ord=9?;/SCRIPTNOSCRIPTa TARGET=_top HREF=http://ad.ca.doubleclick.net/N3081/jump/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;kw=van;ord=9?;IMG NAME=i_banner ALIGN=TOP BORDER=0 VSPACE=0 HSPACE=0 WIDTH=468 HEIGHT=60 SRC=http://ad.ca.doubleclick.net/N3081/ad/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;kw=van;ord=9?;/a/NOSCRIPT/TD/TR On Thursday 31 July 2003 07:41 am, Robert Froese wrote: Hello, I'm a new FreeBSD user with a performance issue. I've installed 5.1R and KDE. I've also installed Phoenix from the ports collection. When I'm using Konqueror or Phoenix to browse certain web sites they take forever to load. It appears the problem is associated with resolving domain names. While I wait (minutes!) for a problematic page to load, Phoenix will report in the notices bar at the bottom Resolving host There's no CPU or network bottleneck and the problem is reproducable in either browser with the same web sites. It seems also to relate to situations where one web page calls another for part of the content (e.g., www.vancouversun.com tries to load from ad.ca.doubleclick.net). If I open up a shell window and ask FreeBSD to resolve the same domain names with host they resolve instantly. So the problem has something to do with the way the package for KDE talks with BSD. Any advice would be greatly appreciated! ...Robert ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Resolving domain names in KDE apps
On Thu, Jul 31, 2003 at 09:10:42AM -0600, Aaron Siegel wrote: Hello Robert I have been using FreeBSD 5.1 RELEASE and Konqueror without any noticeable problems with speed or name resolution. The problem I have are related to browser issue: not haveing support for shockwave, scripting problems, and poorly develop sites that do not work well with the KHTML and Mozilla engines. The site you referenced does load slowly for me, but I think is do to the site and it is defiantly not a result of the operating system or KDE. The webpage does load some files form ad.ca.doubleclick.net see code below. TD width=468 height=60 valign=middle SCRIPT language=JavaScript1.1 SRC=http://ad.ca.doubleclick.net/N3081/adj/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;dcopt=ist;kw=van;ord=9?;/SCRIPTNOSCRIPTa TARGET=_top HREF=http://ad.ca.doubleclick.net/N3081/jump/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;kw=van;ord=9?;IMG NAME=i_banner ALIGN=TOP BORDER=0 VSPACE=0 HSPACE=0 WIDTH=468 HEIGHT=60 SRC=http://ad.ca.doubleclick.net/N3081/ad/ccn.com/van/indexbanner;loc=theTop;sz=468x60;stile=1;kw=van;ord=9?;/a/NOSCRIPT/TD/TR On Thursday 31 July 2003 07:41 am, Robert Froese wrote: Hello, I'm a new FreeBSD user with a performance issue. I've installed 5.1R and KDE. I've also installed Phoenix from the ports collection. When I'm using Konqueror or Phoenix to browse certain web sites they take forever to load. It appears the problem is associated with resolving domain names. While I wait (minutes!) for a problematic page to load, Phoenix will report in the notices bar at the bottom Resolving host There's no CPU or network bottleneck and the problem is reproducable in either browser with the same web sites. It seems also to relate to situations where one web page calls another for part of the content (e.g., www.vancouversun.com tries to load from ad.ca.doubleclick.net). If I open up a shell window and ask FreeBSD to resolve the same domain names with host they resolve instantly. So the problem has something to do with the way the package for KDE talks with BSD. Any advice would be greatly appreciated! Here's why it's so slow: % dig ad.ca.doubleclick.net IN ; DiG 8.3 ad.ca.doubleclick.net IN ;; res options: init recurs defnam dnsrch ;; res_nsend to server default -- 127.0.0.1: Operation timed out Here's how it should have responded: % dig www.bbc.com IN ; DiG 8.3 www.bbc.com IN ;; res options: init recurs defnam dnsrch ;; got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 2 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUERY SECTION: ;; www.bbc.com, type = , class = IN ;; Total query time: 141 msec ;; FROM: happy-idiot-talk.infracaninophile.co.uk to SERVER: default -- 127.0.0.1 ;; WHEN: Thu Jul 31 16:37:51 2003 ;; MSG SIZE sent: 29 rcvd: 29 There's absolutely nothing wrong with your systems. The problem is with the doubleclick.net DNS servers which incorrectly fail to respond at all to queries for resource record types they don't know about. That means you have to sit and wait until the request times out, which takes something like 30s. The bbc.com web servers do the right thing, which is to send a negative response, and all in under 150 ms as you can see. Now, the RFC defining the resource record was published nearly 10 years ago, so there is really absolutely no excuse for doubleclick.net to be running anything so broken. However, if you're running a webserver using the Mozilla engine, the simple response is to right-click on the advert and select block images from this server. Note that there will be no problem resolving those names using host(1) as that does an A lookup (IPv4) by default. Try: % host -t ad.ca.doubleclick.net At this point you're maybe asking what a record is and why your web browser should be trying to look one up. The answer is that is the IPv6 equivalent of an A record: ie. it returns the IPv6 IP number corresponding to the hostname. The reason that Mozilla is doing an IPv6 lookup is that that is what the standards say to do nowadays: see getaddrinfo(3), RFC 2553 and http://www.opengroup.org/onlinepubs/007904975/functions/getaddrinfo.html (You may need to register in order to see that web page). Cheers, Matthew PS. The irony of it all is that resource records are themselves probably going to be phased out in favour of the A6 resource type in the not to distant future, which does essentially the same job, but has various other advantages beyond the scope of this e-mail to go into. See http://www.faqs.org/rfcs/rfc2874.html if you're interested. -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP:
RE: Resolving domain names in KDE apps
I would bet that this is another issue related to IPv6. Take a look at a thread on this list titled Mozilla and long time in resolving Hostnames, especially a message from Dr Matthew J Seaman. Good luck. -Original Message- From: Aaron Siegel [mailto:[EMAIL PROTECTED] Sent: Thursday, July 31, 2003 9:11 AM To: [EMAIL PROTECTED] Subject: Re: Resolving domain names in KDE apps Hello Robert I have been using FreeBSD 5.1 RELEASE and Konqueror without any noticeable problems with speed or name resolution. The problem I have are related to browser issue: not haveing support for shockwave, scripting problems, and poorly develop sites that do not work well with the KHTML and Mozilla engines. The site you referenced does load slowly for me, but I think is do to the site and it is defiantly not a result of the operating system or KDE. The webpage does load some files form ad.ca.doubleclick.net see code below. TD width=468 height=60 valign=middle SCRIPT language=JavaScript1.1 SRC=http://ad.ca.doubleclick.net/N3081/adj/ccn.com/van/indexbanner;loc=theT op;sz=468x60;stile=1;dcopt=ist;kw=van;ord=9?/SCRIPTNOSCRIPTa TARGET=_top HREF=http://ad.ca.doubleclick.net/N3081/jump/ccn.com/van/indexbanner;loc=th eTop;sz=468x60;stile=1;kw=van;ord=9?IMG NAME=i_banner ALIGN=TOP BORDER=0 VSPACE=0 HSPACE=0 WIDTH=468 HEIGHT=60 SRC=http://ad.ca.doubleclick.net/N3081/ad/ccn.com/van/indexbanner;loc=theTo p;sz=468x60;stile=1;kw=van;ord=9?/a/NOSCRIPT/TD/TR On Thursday 31 July 2003 07:41 am, Robert Froese wrote: Hello, I'm a new FreeBSD user with a performance issue. I've installed 5.1R and KDE. I've also installed Phoenix from the ports collection. When I'm using Konqueror or Phoenix to browse certain web sites they take forever to load. It appears the problem is associated with resolving domain names. While I wait (minutes!) for a problematic page to load, Phoenix will report in the notices bar at the bottom Resolving host There's no CPU or network bottleneck and the problem is reproducable in either browser with the same web sites. It seems also to relate to situations where one web page calls another for part of the content (e.g., www.vancouversun.com tries to load from ad.ca.doubleclick.net). If I open up a shell window and ask FreeBSD to resolve the same domain names with host they resolve instantly. So the problem has something to do with the way the package for KDE talks with BSD. Any advice would be greatly appreciated! ...Robert ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] This email communication is intended as a private communication for the sole use of the primary addressee and those individuals listed for copies in the original message. The information contained in this email is private and confidential and if you are not an intended recipient you are hereby notified that copying, forwarding or other dissemination or distribution of this communication by any means is prohibited. If you are not specifically authorized to receive this email and if you believe that you received it in error please notify the original sender immediately. We honour similar requests relating to the privacy of email communications. Cette communication par courrier électronique est une communication privée à l'usage exclusif du destinataire principal ainsi que des personnes dont les noms figurent en copie. Les renseignements contenus dans ce courriel sont confidentiels et si vous n'êtes pas le destinataire prévu, vous êtes avisé, par les présentes que toute reproduction, tout transfert ou toute autre forme de diffusion de cette communication par quelque moyen que ce soit est interdit. Si vous n'êtes pas spécifiquement autorisé à recevoir ce courriel ou si vous croyez l'avoir reçu par erreur, veuillez en aviser l'expéditeur original immédiatement. Nous respectons les demandes similaires qui touchent la confidentialité des communications par courrier électronique. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
