2.4 TCP(?) timeouts

From: Simon Kirby (sim@stormix.com)
Date: Fri Feb 16 2001 - 19:08:05 EST

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    Hello,

    Today we put 2.4.1 on our mail server after having see it perform well on
    some other boxes. It seems now we are receiving a few calls every hour
    from customers reporting that the server tends to hang and eventually
    time out on them when downloading mail. All customers that have reported
    this problem so far are on a didalup connection. Apparently the server
    will stop transmitting data (or the client seems to think so), and then
    their mail client will time out.

    I noticed that the 2.4.1 on my desktop seems to time out SSH connections
    to servers that have become unreachable in about 10 seconds or so, which
    is many times faster than 2.2 which used to sit for hours before it timed
    out (if it all). I'm not sure if this is related. I would expect the
    client to attempt to retransmit some ACKs and eventually get some RSTs
    back if this were the case.

    Has anybody seen similar problems? The box was previously running
    2.2.19pre8 and no customers reported such problems.

    We're using cucipop w/ldap on a dual PIII 800 MHz box with 1.5 GB of RAM.

    Simon-

    [ Stormix Technologies Inc. ][ NetNation Communications Inc. ]
    [ sim@stormix.com ][ sim@netnation.com ]
    [ Opinions expressed are not necessarily those of my employers. ]
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