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Author about inbound and outbound port number for ISA firewall
ITSEC

2003-05-09, 2:37 pm

hi, I was confused with the inbound and outbound port number when I confige some firewall. for example, port 21 is for FTP, and if I want let people inside the firewall go out for other FTP servers, i should let the outbound port 21 open; if I have a FTP server inside, i should let the inbound port 21 open, is that right?

the inbound port 21 is the same port with outbound port 21 or not?

another thing is what is the difference between send receive and receive send for UDP?

Thanks a lot!
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