There are third-party firewalls that you can install on your Mac, such as Little Snitch, Norton, or Symantec. If the firewall indicator is yellow, with a warning icon below, then you need to change the configuration. Underpass needs to receive an incoming connection in order for your partner to start a chat with your Mac.

If you select 'Automatically listen for partner' in Underpass, then you must not block incoming connections with the firewall. Underpass can also operate with the firewall on, as long as the firewall is properly configured. The firewall is off by default, in which case it poses no problem.

In most cases a firewall should not interfere with Underpass, but if there is an overly strict or poorly configured firewall on your network, then it's possible that the firewall could block Underpass chats. FirewallsĪ firewall is a security system that blocks certain network traffic. Configuring a server properly is more complex, so the following sections apply mostly to the 'Automatically listen for partner' setting. The client side is usually not a problem, because your Mac acts as a client all the time, for example when you load a web site in your browser or check and send email. When you select the 'Automatically listen for partner' setting, Underpass becomes a server. When you select 'Chat' in the toolbar, Underpass becomes a client.

In technical terms, each chat connection has a client and a server: the server listens for connections, and the client connects to the listening server. See Settings for more information about that setting. Note that if one partner's password setting is blank, then the other partner's password setting must be blank too.īesides mismatched passwords, most of the issues with chats involve the 'Automatically listen for partner' setting.

If you're having trouble establishing a chat with your partner, the first thing to check is whether you're using the same password.

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