Use the /oper command to attain this.
+i - Designates this client 'invisible'.
? +h - Has a cloaked host. May be +x depending on cloaking module
- +g - "caller id" mode only allow accept clients to message you
+ +g - Deny users not on your /ACCEPT list from messaging you and
+ inviting you to channels.
+ ? +u - Receive messages that would otherwise be filtered server side
+ based on content.
+w - Can see oper wallops.
? +C - Prevents you from receiving CTCPs other than ACTION.
+D - Deaf - ignores all channel messages.
+ +G - Deny users not on your /ACCEPT list and not in a channel
+ with you from messaging you and inviting you to channels.
+ This is a softer form of +g.
+ ? +I - Hides your WHOIS idle time and prevents you seeing the idle
+ time of other users.
+Q - Prevents you from being affected by channel forwarding.
+R - Prevents unidentified users that you have not accepted from
messaging you.