I recently updated KVIrc on OS X from 3.2.0 to 4.2.0. The update appeared to complete successfully, however on trying to connect to my Irssi Proxy server nothing appeared to happen.
The output from the server console was something like below
This is the first connection in this IRC context: using the global server setting Attempting connection to myirssiproxy.local (RawrIRC) on port 8000 Looking up the server hostname (myirssiproxy.local)... Server hostname resolved to 10.44.1.1 Contacting IRC server myirssiproxy.local (10.44.1.1) on port 8000 Connection established [myirssiproxy.local (10.44.1.1:8000)] Local host address is 10.44.1.2
It turns out that in 4.2.0 the servers automatically had 'Switch to SSL/TLS by using the STARTTLS extension' enabled.
Unfortunately Irssi Proxy doesn't like STARTTLS, so while the logs show successful connections no data is transferred over the socket.
The simple solution to get things back up and running properly is to disable the option under each server.
To do this browse to 'Configure servers' under Settings, double click on the server under the network, tab over to Advanced and disable 'Switch to SSL/TLS by using the STARTTLS extension'.
If you have a large number of servers you can also directly edit the ini file under ~/.config/KVIrc/config/serverdb.kvc. In this file each network is a section and each server is numbered.
To disabled STARTTLS for the first server in network A, your config should look something like the below
This will usually have a number of other items, a full example is below
[FreeNode] 0_Port=8000 0_Hostname=myirssiproxy.local 0_Ip=10.44.1.1 0_Nick=MyNick NServers=1 RealName=MyName 0_Pass=Mypass 0_AutoConnect=true 0_EnabledSTARTTLS=false NickName=MyNick 0_Id=Server1 0_EnabledCAP=false 0_RealName=MyName 0_User=MyUser UserName=Damian
This also makes it quite easy to generally manage servers in KVIrc, outside of wide scale settings changes.