What we mean by NOPs generator and payload encoders

[deepsa at fedoraproject.org (Deependra Singh Shekhawat)]

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Hello guys,

Started with metasploit few weeks back. Still learning and reading about
it. While reading about the architecture of metasploit I came across NOP
generators.

Now I have found that these are no operation generators (correct me if I
am wrong) used to let the exploit get un-detected from IDS.

Can some one please elaborate more on NOPs and how they are generated as
well as how one can use them in creating one's own exploit or porting
any existing exploit to the metasploit framework ?


Also I have one doubt about Encoders , I read that encoders are used to
encode the payloads and probably they get decoded at the target machine,
can you please explain how this process happens and what basically
triggers this ?

Thanks for the great stuff , guys . Really appreciate it as I read more
about it.

~jeevanullas
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