How would you find whether a remote server is up or not?

Answer Posted / girish g pillai

Ping could be disabled on the remote machine.
Telnet cannot be used as a reliable method, because we have
to know the services running on the machine to telnet to
that port.

nmap would be a reliable method, but normal nmap checks are
disabled in the network level, so it would be good to run
nmap in stealth mode.

nmap -sS <IP Addr>

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