Returns either the remote host name or IP address. if the former is unavailable: 

$cgi->remote_host()

[download]

By the way, there's also 

$cgi->remote_user()

[download]

as an alternative to $ENV{USER_NAME}. In both case, $cgi is a CGI object.

In reply to Re: Remote HostName using CGI by ikegami
in thread Remote HostName using CGI by vsailas

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