Very slow with some ISP's

Very slow with some ISP's

Post by Bar » Thu, 27 Dec 2001 02:41:24



When I connect to my server through certain ISP's (one or two) my
pages come up extremely slow or not at all. All the sites on my server
have this problem, and it is the same for html, php, ssh or whatever.
It just takes ages for a byte to load. Other ISP's have no problem at
all.

I've tried setting Hostnamelookup to "off", but that doesn't help.

Nobody seems to know the answer. The ISP doesn't respond to my
questions.

I'm running Apache 1.3.20 on a fast linux machine (slackware)
(2x866Mhz, 1 gig).

If anyone could give me a clue that would be very nice, but please
make the clue 'understandable' for a newbie, though a clue is always
better then no clue at all.

regards

bart

 
 
 

Very slow with some ISP's

Post by David Efflan » Thu, 27 Dec 2001 14:57:25



Quote:> When I connect to my server through certain ISP's (one or two) my
> pages come up extremely slow or not at all. All the sites on my server
> have this problem, and it is the same for html, php, ssh or whatever.
> It just takes ages for a byte to load. Other ISP's have no problem at
> all.

> I've tried setting Hostnamelookup to "off", but that doesn't help.

> Nobody seems to know the answer. The ISP doesn't respond to my
> questions.

> I'm running Apache 1.3.20 on a fast linux machine (slackware)
> (2x866Mhz, 1 gig).

> If anyone could give me a clue that would be very nice, but please
> make the clue 'understandable' for a newbie, though a clue is always
> better then no clue at all.

Make sure that the server name resolves.  Try doing a traceroute (tracert
in Windows) to the server, or from CGI on the server to you (REMOTE_ADDR
in env) and display the output as text/plain (or within <pre> tags).

--
David Efflandt - All spam is ignored - http://www.de-srv.com/
http://www.autox.chicago.il.us/  http://www.berniesfloral.net/
http://cgi-help.virtualave.net/  http://hammer.prohosting.com/~cgi-wiz/

 
 
 

Very slow with some ISP's

Post by Bar » Thu, 27 Dec 2001 21:32:59



> Make sure that the server name resolves.  Try doing a traceroute (tracert
> in Windows) to the server, or from CGI on the server to you (REMOTE_ADDR
> in env) and display the output as text/plain (or within <pre> tags).

Thanks for your reply.

Traceroute from my server to the remote address:

<pre>
 1  core.router.trueserver.nl (213.239.128.1)  0.319 ms  0.224 ms  0.215 ms
 2  ams-ix.wish.net (193.148.15.134)  1.417 ms  0.887 ms  1.749 ms
 3  l3.wish.nl (212.123.129.2)  2.488 ms  1.421 ms  2.311 ms
 4  v-tel.wish.net (212.123.129.80)  1.79 ms  1.983 ms  1.885 ms
 5  62.58.90.65 (62.58.90.65)  3.364 ms  3.491 ms  3.325 ms
 6  62.58.95.9 (62.58.95.9)  4.258 ms  3.925 ms  3.473 ms
 7  p7913.nl.wish.net (212.123.168.233)  231.522 ms  118.107 ms  119.049 ms
</pre>

Tracert from the remote address to my server:

<pre>
1   *   *   *   Timeout bij opdracht.
2  133 ms  108 ms  25 ms  62.58.95.10
3  130 ms  111 ms  122 ms  62.58.90.66
4  137 ms  112 ms  110 ms  gig0.bbone1.13.wish-noknok.nl [212.123.129.93]
5  125 ms  116 ms  125 ms  ams-ix.wish.nl [212.123.129.1]
6  130 ms  139 ms  129 ms  core.m20-amsix.trueserver.nl [193.149.15.163]
7  130 ms  126 ms  123 ms  ouderalleen.nl [213.239.130.23]
</pre>

 
 
 

1. transition from isp 'A' to isp 'B' routing problem

I am switching from isp "a" to isp "b".  Each one has it's own
dedicated router on my DMZ. I have one server (email) with one nic
card on the DMZ.  I also have a third dedicated router on the DMZ
which goes to my private network.  Isp "b" is the one I am switching
to and want everything to go through.  Routing all internet traffic
from the private network to isp "b" was simple.

        isp "a"         Isp "b"
       -----------     -----------
       | router  |     | router  |
       -----------     -----------
            |               |              ----------
             ------------------------------| router | --> private
network
                     |                     ----------
                ---------------
                | mail server |
                ---------------      

   The problem is going to be the transition period when email is
coming in through both isp's when some servers are sending to the old
ip and some to the new ip before everything is updated on the
internet.
   Currently the internet routes all my mail through isp "a" to my
dedicated ip address on the mail server and my default route on the
server is through isp "a". This works fine.  If I change my default
route to go through isp "b" I stop getting mail.  Apparently you
cannot come in through one router and return through a different one.
It seem I can only communicate with the internet through the router
which is the default route.
   By the way router "b" also has a dedicated ip but does address
translation to the DMZ network which is probably the problem.
   What I need is a way to route traffic that come from router "a"
back to router "a" and traffic from router "b" back to router "b".
   I have read many howto's and posts but none seem to address this
issue.  I was wondering if something like the following would work:
    ip route add default via router-A-ip nexthop via router-B-ip
I found a couple of posts which refered to this.  Also where can I
find a complete list of comands for ip?

   Thanks in advance for any help or suggestions you may have.

Joe D.

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