Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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Understand that at the moment I am sitting down to read rfc0821.txt and a rather thick Oreilly Sendmail book. I am only hoping that one of you can direct me to a shorter path of reasoning...
I am using Sendmail on my networks proxy/gateway to relay mail to the world from my internal network. For some odd reason it takes forever to get a message from a client to the smtp gateway.
Before I got hired our network configuration was absolutely retarded... not that I am the all-knowing authority on network confiurations and all but...
We had 24 port hubs cascaded together before they went into our backbone switch. To be more specific, we had 2 24 port hubs going into one 24 port hub that then fed into our backbone switch. I have since ordered/installed a new 24 port switch to replace our old on-it's-last-leg 12 port switch and placed each hub into a port on the switch. So basically, we no longer have any cascaded hubs.
Here is the kicker...
Our end-users are complaining about how it is taking much longer for them so send email then prior to when I made the network changes.
To test this, I sent an internal host an email from my internal machine. I then tailed the mail log on our smtp gateway. It took about 10-20 seconds for this mail to be received by the smtp gateway.
Any ideas why this is happening? I am of course doing my homework and reading what I can but I have an enormous amount of literature to sift through. Any help you have to steer me in the right direction would be GREATLY appreciated...