LINUX: HOW TO CHECK CONNECTIONS IN TCP ACCEPT QUEUE?

Accept Queue size can be checked using below command. 
 
$ ss -plnt sport = :6443|cat 
 
To check accept queue size on specific port below command can be used. 
 
$ ss -plnt sport = :6443|cat 
State   Recv-Q Send-Q  Local Address:Port  Peer Address:Port 
LISTEN  0      1024                *:6443             *:* 
 
 
The column Recv-Q shows the number of sockets in the Accept Queue, and Send-Q shows the backlog parameter. 
 
Command to Check if TCP Accept Queue is Overflowing. 
 
ss -n state syn-recv sport = :80 | wc -l 
 

 

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Article Author: Tarun Boyella