How to ssh in the face of huge (30 second) latency? [closed]

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I need to create an ssh connection between two Linux machines running Centos v5 but the latency could be as high as 30 seconds. I find that if I test something approaching this configuration artificially by simulating 7 seconds or more latency using:

tc qdisc add dev eth0 root netem delay 7s

When I try:

ssh -n -o ConnectTimeout=0 WilliamKF@centos5Machine whoami

It fails after about 1 min 23 sec with:

Connection closed by 10.35.50.114

Note that ConnectTimeout=0 means never timeout. Also, simulating a latency of 6 seconds results in a successful ssh after about 1 min 32 sec.

Is there anything I can do to get ssh to work in the face of extremely high latency on Linux? Why does ssh fail at this threshold

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Have you ever tried using screen? When I have a bad connection that keeps disconnecting me I make sure I use it so I don't lose my terminal session.

http://www.rackaid.com/resources/linux-screen-tutorial-and-how-to/