SYN and CWR ECE SYN

Discussion in 'Linux Networking' started by Jason, Jul 14, 2003.

  1. Jason

    Jason Guest

    Hi,

    I telnet a remote mail server smtp port 25 from internal lan, no problem.
    The log in the Linux box has SYN packets destined to the remote mail server.
    However, if I telnet that mail server from my Linux box, the packets to that
    server is not SYN, it is CWR ECE SYN. And the remote mail server respond
    with nothing back.
    The linux box has 3 NICs, config as multiple uplinks with iproute, iptables
    running.

    SYN
    PC- - - - - - - - -> --- NT4.0 --->linux------>remote mail server, telnet
    OK.

    linux- - - - - - - - - >remote mail server, telnet no good.
    CWR ECE SYN

    How do I fix this problem?
    Any help will be appreciated.

    Jason
     
    Jason, Jul 14, 2003
    #1
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