Translations:FAQ/427/en

For client message tags too, a message tag handler needs to be loaded by a module. This is a design decision. The IRCv3 work group created client message tags where 1) the server has no idea which client tags the client supports and 2) allows a lot of traffic via message tags (4096 bytes per line, much more than the convential 512 bytes per line). This was with good intentions, allowing tags to be created without having to wait for server support and lots of room (bytes), but according to the UnrealIRCd head coder this creates a number of security and moderation issues. These problems are explained in detail in this IRCv3 discussion thread. In UnrealIRCd we deal with these problems by requiring a module for each message tag, including client message tags, these modules can then inspect and filter specific values.