s6-networking
Software
skarnet.org
 The s6-ident-client program 
s6-ident-client is a command-line client application that
performs IDENT (RFC 1413) queries.
 Interface 
     s6-ident-client [ -t millisecs ] remoteaddr remoteport localaddr localport
 -  s6-ident-client contacts the IDENT server on address remoteaddr
port 113 and asks it about the connection from address remoteaddr
port remoteport to address localaddr port localport. 
 
 -  It prints the answer to stdout. 
 
 -  It exits 0 if the answer is positive or 1 if the answer is negative,
in which case it also prints an informative message to stderr. 
 
 -  remoteaddr and localaddr can be either IPv4
or IPv6 addresses; however, they must both be of the same type. 
 
 Options 
 -  -t millisecs : if no answer has been
obtained within millisecs milliseconds, s6-ident-client will
exit 99 with an error message. By default, millisecs is 0,
which means no time limit.