don't use DCC

Closes #48

_posts/2015-03-18-nodcc.md

@@ -0,0 +1,38 @@
+---
+layout: post
+comments: true
+title: "Don't use DCC & How to disable it"
+category: [english]
+tags: [irc, english]
+---
+
+DCC was way to send files and chat without having IRC server in the
+between. It's not very common nowadays and what is done nowadays is
+uploading images etc. to social media services or web servers or using
+other file transfer protocols.
+
+Here are some reasons to not use it:
+
+* There is no proper standard or if there is, no one follows it, all
+  clients speak their own dialects and may be unable to communicate with
+  other clients. Not all clients even implement the same features.
+* NAT and firewalls break it
+    * As DCC requires port on sending/hosting side, it must be opened in
+      firewall and if there is NAT which there is in most of situations
+      nowadays, the port must be forwarded. Most of average users have
+      no idea how to do the latter if even the first.
+* The only place where most of people see it is spam. The only thing lately
+  where people have seen is two attacks which @grawity has documented
+  [here](https://nullroute.eu.org/~grawity/dcc.html)
+
+## Disabling DCC
+
+This depends on your client and I am only able to give instructions for
+three:
+
+* WeeChat: "`/plugin unload xfer`" and "`/set weechat.plugin.autoload *,!xfer`"
+    * The option in second command can be also be used to not automatically
+      load other plugins, I personally use `/set weechat.plugin.autoload alias,exec,irc,perl,python,script,trigger,logger`.
+      The `*,!xfer` simply means load everything else than xfer.
+* HexChat: "`/ignore *!*@* DCC`"
+* ZNC & clients behind it: "`/znc *controlpanel addctcp $me DCC`"