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As far as I know SYN retransmissions: with rounding they occur 1, 3, 6, 12, 24, 48, and then 64 seconds apart. I want to do this on different interval time. what is the name of this parameter?

can I control on it in android and windows?

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1 Answer 1

up vote 2 down vote accepted

Windows:

You can only control the first retransmission with HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ID. After this, the retransmitted SYN packets are dynamically controlled (Source: KB 170359)

Edit:

Per discussion in the comments, it appears that the KB article I referenced is flawed for Windows 7; it seems that changing SYN retransmission parameters is not supported.

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is there any name for this parameter ? only for syn retransmission? is it the RTO? –  Avihai Marchiano Jul 29 '12 at 12:41
    
It is called TCPInitialRtt, used for the first SYN retransmission. RTO is controlled indirectly with TcpMaxDataRetransmissions, but that isn't a timeout per-se... it's the number of attempts before Windows aborts the connection –  Mike Pennington Jul 29 '12 at 12:42
    
I dont see this key. do i need to add it? dosnt it part of the TCP RFC? do you know how to do it in android? or a good search key words for this. Thank you!!!! –  Avihai Marchiano Jul 29 '12 at 12:48
    
Windows 7 enterprise. –  Avihai Marchiano Jul 29 '12 at 12:51
    
I haven't found android information, you might try Stack Overflow for that question. Add this to Win7 Enterprise if it isn't there. –  Mike Pennington Jul 29 '12 at 12:54

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