Main Features
Modules
ZNC supports dynamic loading of C++, Perl, Python and Tcl modules. To get a list of the available modules and more information follow the link.
Detaching
ZNC will remain connected to IRC even while you are offline. You can then reattach later and catch up with what happened while you were gone, and your nick (and operator status) will have been kept for you.
Multiple Users
You can add additional users under one running process. Useful for public shells that limit background processes.
Multiple Networks
Each user can connect to several IRC networks at once, with an optional limit configured by ZNC admin.
Multiple Clients
Connect to the same user/network with as many clients as you want.
Playback Buffers
Stay up-to-date with what happened and when it happened while you were detached, timestamps are also printed and can be manually configured.
SSL Support
Encryption for both the listen port and connecting to IRC servers. If your system has OpenSSL, ZNC automatically supports SSL connections.
IPv6 Support
Both IPv4 and IPv6 address families just work, if your system supports them.
Partyline
Using the global partyline module, you can join channels and query users on the internal ZNC network
Web Administration
Using the global webadmin module, admins can add/remove/edit users and global settings and non admins can edit their own user settings.