mIRC connects a person to Internet Relay Chat networks, where conversations live in named channels or private query windows. An IRC network can contain many servers that lead to the same users and channels. mIRC keeps each server connection, channel, private exchange, and status stream in its own window. This differs from opening a web chat: mIRC speaks the IRC protocol directly, retains connection settings on the computer, and exposes the network commands behind the conversation.
Server identity
The Connect dialog asks for a server, a primary nickname, and an alternate nickname. A nickname is a temporary name on that network rather than a permanent account by itself. If both choices are already in use, mIRC places a nickname command in the status edit box and waits for another name. The Full Name field is visible to other IRC users, so entering a real identity there can disclose more than expected.
Each saved server entry needs an address and port. mIRC distinguishes an ordinary port from encrypted connection choices by prefixes in the port value. A server may also require a network password, SASL credentials, or a NickServ login method. Choosing the wrong method can produce a successful socket connection without completing the account login that a channel expects.
Channel windows
After connection, mIRC can open the Favorites folder and join saved channels. The same channel name may lead to unrelated communities on different IRC networks, so a favorite must remain associated with the intended network. The Channels List dialog downloads the active channel list from the current server, while the join command opens a channel directly when its name is already known.
mIRC can maintain several server windows at once. Every channel and private query belongs to the connection that created it. This matters when two networks use the same nickname or channel name: text typed into one window goes through that window’s connection, and a script must select the correct connection before it sends a command.
Local records
Message logging writes channel or query text to files on the computer. mIRC can create dated file names and strip color, bold, underline, or reverse control codes before saving. Closing a channel does not move those records to an online account. Anyone who can read the log folder can read the stored conversation, so logging changes the privacy of a session even when the server retains no history.
Direct transfers
DCC sends a file or private chat over a direct client-to-client connection rather than carrying the payload through the IRC network. An incoming file request can display a prompt, enter an automatic receive path, or be ignored. If a file with the same name already exists, mIRC can overwrite it, resume the transfer, or choose another name. Overwrite erases the existing copy and starts again.
Direct connections can fail behind a firewall or router even while ordinary channel chat works. Passive DCC changes which side waits for the connection and can solve some of those cases. Automatic acceptance should stay limited to carefully selected senders and file types because the transfer comes from another IRC user, not from a checked download service.
Connection rules
mIRC can run network-specific commands after connecting, reconnect after an unexpected disconnect, and bind its sockets to a chosen adapter or local address. The adapter setting also controls DNS lookups and DCC traffic. A separate fallback option lets mIRC use the system default when that bind fails. Anyone relying on a VPN to contain IRC traffic must disable that fallback; otherwise a failed VPN bind can move the next connection onto the ordinary network interface.
