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Date:      Tue, 03 Aug 1999 06:07:01 PDT
From:      "N. N.M" <madrapour@hotmail.com>
To:        freebsd-security@FreeBSD.ORG
Subject:   Re: Increasing SYN-ACK queue
Message-ID:  <19990803130701.13891.qmail@hotmail.com>

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>According to Slawek Zak:
>>I think that the original poster aked about the default value for all 
>>connections. Is there any way to do this ?
>
>Increase the following variable:
>
>kern.ipc.somaxconn: 128
>--
>Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=-

Thanks all for your replies.
Slawek is right, I wanted to know how I can increase the size of "SYN-ACK 
queue" and also decrease the "time-out waiting", both for all TCP 
connections. This will reduce the probabilty of being a victem of SYN 
Attack.
Anyway, "kern.ipc.somaxconn" variable seems to be related to "SYN-ACK 
queue". Does anybody know about the variable related to "time-out waiting" 
which this is the amount of time that a connection is allowed to stay in a 
half-open state.
Beside, what considerations must be concerned when changing the amount of 
these variables? Is there any fixed and tested amount for them?


thanks,
Nazila


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