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For some reason from some computers and some networks our website is extremely slow.
From work under Windows and Linux boxes home page loads 3-5sec.
under Windows XP - 3-5sec
under Linux(Ubuntu) - 5min!
another Windows XP 5min also
under Mac 5-10sec, but it might be because computer is slow
My friend test our web site from his work and said:
"- It work so some linux boxes
MAC on some of them YES on some NO
CentOs 5.1 NO
Redhat- kernel 2.6.9 YES
Fedora 8 NO"
What is the problem? Is this our problem or provider problem?
What does this YES and NO mean? And what was the test?
Where is the homepage hosted?
How are you attempting to connect?
Are all the boxen connecting via identical means? (Compare modems with modems - xdsl? same speed? over network? compare on same network.)
Check machine specs - if the page has a lot of rich content, then slow connections will connect slowly. Try it out on a simple web page with no bells and whistles?
This kinda sounds like it could be a DNS issue. Slowness like this can be caused by faulty DNS entires. On the linux boxes check what is in resolv.conf If every computer that take 5 mins to load the page has the same DNS server that might be it. Just an idea.
I actually didn't get it. Top level administrators set some firewall settings - close all ports and left just opened http, smtp, ftp and few others. We were debuging using tcpdump and figured out that destination server reply for every try to connect but server with the firewall accept only first attempt to connect and reject all the rest. Then sysadmin wrote "keep state" somewhere in the Packet Filtering rules and it works! Sorry i don't know more details.