numbers is in the range of 1～255；the name of names is in the range of icmp,
igmp, tcp, udp, gre, ospf and ipinip. This parameter is used in extended ACL.
established：means this rule is effective to the first SYN packet after the
successful connection of TCP. This is the optional parameter which appears
when the parameter of protocol is tcp. This parameter is used in extended ACL.
[Port [portmask]]: means the interface range of TCP/UDP. Port：means the tcp or
udp port used by packet which is the optional parameter by using symbols oe
numbers. The number is in the range of 0～65535,and the symbol refers to
symbol table helped to remembered by port number. Portmask is port mask
which is optional and is in the range of 0～65535. When the protocol is tcp or
udp, it can support the configuration in the range of protocol ports. When
configuring port number and mask, user can input octal, decimal or hex not port
to permit all ports; portmask can be 0 or none to express the port itself, or it can
be determined by port and portmask according to the port range. This rule can
support single port configuration which can support the configuration of larger
or equal to the port range (accurate to 2
n
).
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