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Can I use all the Internet protocols (FTP, telnet, SMTP, POP3, Messenger), etc.?

April 26, 2017FTP internet Messenger pop3 protocols SMTP telnet

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Can I use all the Internet protocols (FTP, telnet, SMTP, POP3, Messenger), etc.?

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Due to the use of NAT (Network Address Translation) and PAT (Port Address Translation), certain Internet services may not work if they require validation or identification of the source IP.