Setting up TCP/IP filtering

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Using TCP/IP filtering

Tcp/ip filtering is a simple but effective firewall but cannot distinguish between incoming and outgoing traffic or do port forwarding.

Some standard ports

  • 21 standard ftp
  • 80 standard http
  • 443 standard https
  • 3389 standard remote desktop connection

NEOSYS non-standard ports

  • 2500 neosys smtp
  • 4430 neosys https port
  • 55000 neosys ultravnc reverse connection
  • 19580 neosys ssh port
  • 8000 neosys wiki

TCP/IP properties, advanced, options

Tcpipfiltering1.png