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Old 07-10-2007, 02:27 AM   #1
Registered: Jul 2004
Location: Herent, Belgium, Europe, Earth
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Very slow connection speed


I have some issues (with Linux networking )... I can resolv addresses like immediately, but when I try to connect it's so slow.

For example... 'dig sqlserver'... Returns a normal dig immediately (query time: 2msec). If I want to connect to it 'ssh sqlserver', it takes exactly 17 seconds to connect (the server is like 5 foot away, connected to a 1000Mbps switch and I am connected directly to this switch as well). I disconnect and reconnect again and again it's 17 seconds.

Once connected, I get normal speeds (up to a few MB/s)...

I really have no idea what could be the problem here.

Could anyone help me here?

Old 07-12-2007, 11:56 AM   #2
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Originally Posted by G00fy

If I want to connect to it 'ssh sqlserver', it takes exactly 17 seconds to connect
With those kind of numbers, what is usually happening is that you have as your first nameserver resolution service something that is never going to work. You try it; you wait for it to time out; you then try something that works.

In other words, its about the order that you try things in.

As a guess, try nameserver switch (that's the one that most people overlook) and check the order there. So look in /etc/nsswitch.conf and check the 'hosts' order there. The first service ought to be one that you expect to work, with the option to fall back to the others if there is something wrong and that first one doesn't work.


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