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I am using proftpd on &nbsp;a FreeBSD 4.0 server. &nbsp;After I disconnect from the ftp server there are multiple TCP connections in the CLOSE_WAIT state when I run a netstat. <br />
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tcp4 &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp;0 &nbsp;mymachine.ftp &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x.x.x.5.4964 &nbsp; &nbsp; &nbsp; &nbsp;CLOSE_WAIT<br />
tcp4 &nbsp; &nbsp; &nbsp; 0 &nbsp; &nbsp; &nbsp;0 &nbsp;mymachine.ftp &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x.x.x.4.4956 &nbsp; &nbsp; &nbsp; &nbsp;CLOSE_WAIT<br />
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Here is what I have in the proftpd.conf file<br />
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TimeoutLogin &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;120<br />
TimeoutIdle &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;300<br />
TimeoutNoTransfer &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;600<br />
TimeoutStalled &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;900<br />
TimeoutSession &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1000<br />
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I also run ipfw on this server and tried the following commands to get rid of these hung connections:<br />
net.inet.ip.fw.dyn_ack_lif<wbr />etime=400<br />
<br />
Is there a way I can make these CLOSE_WAIT sessions expire quickly?<br />

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I am using proftpd on  a FreeBSD 4.0 server.  After I disconnect from the ftp server there are multiple TCP connections in the CLOSE_WAIT state when I run a netstat. 

tcp4       0      0  mymachine.ftp           x.x.x.5.4964        CLOSE_WAIT
tcp4       0      0  mymachine.ftp           x.x.x.4.4956        CLOSE_WAIT

Here is what I have in the proftpd.conf file

TimeoutLogin                    120
TimeoutIdle                      300
TimeoutNoTransfer            600
TimeoutStalled                  900
TimeoutSession                 1000

I also run ipfw on this server and tried the following commands to get rid of these hung connections:
net.inet.ip.fw.dyn_ack_lifetime=400

Is there a way I can make these CLOSE_WAIT sessions expire quickly?


Clearing hung CLOSE_WAIT TCP/IP  connections on a FreeBSD server.

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