login process ?

[Jerry_109]

Is this information I was given correct? I asked about what programs are accessed when logging in to our server. Do they all go through login ? :

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The man page on "login" gives the best information ( weather it's telnet, ssh, rlogin, ftp ) they get to login :

DESCRIPTION
The login command is used at the beginning of each terminal session to
properly identify a prospective user. login can be invoked as a user
command or by the system as an incoming connection is established.
login can also be invoked by the system when a previous user shell
terminates but the terminal does not disconnect.

[A. Clay Stephenson · Accepted solution]

Maybe but it depends. The ways that one can access a UNIX server are legion. Ftp does not use login, if you are using an X terminal then you may or may not establich connection via a telnet client but instead use a variant called cdelogin (or dtlogin). NFS connections don't use login and the ways applications can connect are potentially infinite. You have to narrow the scope of your question and know the applications and services that your server is running to even begin to answer this question. Do you consider NTP requests or echo an access? How about an ICMP (e.g. ping)?