Iptables Tutorial 1.2.2

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The IPv4 parameter is used to send an IPv4 address in the INIT chunk. The IPv4 address can be used to send data through the association. Multiple IPv4 and IPv6 addresses can be specified for a single SCTP association.

Parameter Type - bit 0-15. This is always set to 5 for IPv4 address parameters.

Length - bit 16-31. This is always set to 8 for IPv4 address parameters.

IPv4 Address - bit 32-63. This is an IPv4 address of the sending endpoint.

This parameter is used to send IPv6 addresses in the INIT chunk. This address can then be used to contact the sending endpoint with this association.

Type - bit 0-15. Always set to 6 for the IPv6 parameters.

Length bit 16-31. Always set to 20 for IPv6 parameters.

IPv6 address - bit 32-159. This is an IPv6 address of the sending endpoint that can be used to connect to by the receiving endpoint.

The Hostname parameter is used to send a single hostname as an address. Thea receiving host must then look up the hostname and use any and/or all of the addresses it receives from there. If a hostname parameter is sent, no other IPv4, IPv6 or Hostname parameters may be sent.

Type - bit 0-15. This is always set to 11 for Hostname Parameters.

Length - bit 16-31. The length of the whole parameter, including type, length and hostname field. The Hostname field is variable length. The length is counted in bytes.

Hostname - bit 32-n. A variable length parameter containing a hostname. The hostname is resolved by the receiving end to get the addresses that can be used to contact the sending endpoint.


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