Книга: Linux Network Administrator Guide, Second Edition

UDP Extensions: used with -m udp -p udp

UDP Extensions: used with -m udp -p udp

- -sport [!] [port[:port]]

Specifies the port that the datagram source must be using to match this rule. Ports may be specified as a range by specifying the upper and lower limits of the range using the colon as a delimiter. For example, 20:25 describes all of the ports numbered 20 up to and including 25. Again, the! character may be used to negate the values.

- -dport [!] [port[:port]]

Specifies the port that the datagram destination must be using to match this rule. The argument is coded identically to the - -sport option.

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