Are you certain it is the firewall blocking it?
By '+7000', do you mean the port is an SSL enabled port?
and if so, do you have SSL installed and working?
You can check this by simply typing this into and edit box:
the return result should be
$trueif this is $true, check your SSL settings in mIRC:
From the mIRC menu bar:
Tools > Options > Connect > Options > Click SSL Button
Check to make sure you have '
Display invalid certificates for approval' selected in the
Certificates section..
However, if the return is
$false, have a look here:
http://www.mirc.com/ssl.html