Our server is running but over time it hanged and the netstat gave this kind
of output (endless connections waiting for LAST_ACK). Are we missing
something to clean up these connections if the client leaves them hanging?
Is there a timout we can use?

Thanks,

Dan

Here is the output from netstat -taupe | sort

...
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16093
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16225
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16328
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16380
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16513
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16778
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16906
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16924
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:16981
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17091
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17097
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17218
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17273
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17742
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17821
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17825
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:17872
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18188
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18393
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18417
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18465
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18517
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18894
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18958
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:18978
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19110
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19128
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19237
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19460
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19654
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19789
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19905
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:19975
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:20023
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:20091
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:20484
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:20498
LAST_ACK    root       0          -                   
tcp        1      1 ip-10-194-154-81.ec2.in:ftp ::ffff:206.162.148.12:20503
LAST_ACK    root       0          -                   
...

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