IRC - Internet Relay Chat
Identd
Some IRC (Internet Relay Chat) servers wont allow you to connect unless ident working. Ident- Enabling Server ident for IRC for Linux IRC client users may be necessary to achieve connection to a specific server.
DCC Connection
'DCC' stands for Direct Client Connection, it is used to exchange data directly between two IRC clients (with no IRC server in the middle).
- KVIrc Documentation provides a guide on DCC negotiation and connection which explains well the protocols involved and helps with troubleshooting.
- IRCPOLITICS.ORG has an Unable to DCC troubleshooting guide for the person who wants simple explanations and illustrations on how to solve DCC problems.