php - Faking $_SERVER[‘REMOTE_ADDR’] in intranet? -

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i've looked around answer question, answers situational - here's mine:

if hacker on limited, local network, can fake ip in $_server[‘remote_addr’]? (and out of curiosity - how?)

i understand when comes internet, variable such can wrangled whatever want. in local, wired network may not connected internet @ all, can fake address? i'm assuming mr.missionimpossible crawling along ceiling notebook , ethernet cable 1 of switches. response in scenario won't matter - running php script should limited location(s).

thanks in advance!

i don't know definite if can faked in general, guess can if know you're doing. intranet tcp/ip network with, in case of website, http layer on top. environment same.

so if can done on public internet, can done on internal network too.





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