Nginx Blocking a bot

Hi
I found on logs this:

---

Code:

omgilibot/0.4

and i want to block this user agent but i can't find any info for it....

So can i block it as user agent omgilibot/0.4 or as omgilibot ?

 

I know how but is the name of the agent omgilibot/0.4 or omgilibot ?

I have many bots that end with botname/0.1.4 or botname/4.0 and i don't know as i can't find any info on the net how to block it....with the /x.x.x or without?

 

One last question

The user agent must match exact the name to be blocked or not?

For example if i got this: botname-dev and i add to block it as botname without the -dev it will be blocked?

 

Just to be sure to archive what i ask for i should change this:

Code:

  if ($http_user_agent ~ "GrabNet") {
  set $block_user_agents 1;
  }

to this?

Code:

  if ($http_user_agent ~* "GrabNet") {
  set $block_user_agents 1;
  }

 

Only for lower and uppercase or for GrabNet-dev also?

 

Ok great thanks

After running this command i will get an output on ssh like 403 forbidden or i must check on access.log to see if it gets blocked?

 

I got this bot: WeSEE:Ads/PageBot

Should i block it as ~ WeSEE or ~ WeSEE:Ads ?

Is there any general rule for this so i don't ask always about this?
For example i use always what is before / ?

Thanks