How do ports work with IPv6

Question

Conventional IPv4 dotted quad notation separates the address from the port with a colon  as in this example of a webserver on the loopback interface   127 0 0 1 80   but with IPv6 notation the address itself can contain colons  For example  this is the short form of the loopback address     1   How are ports  or their functional equivalent  expressed in a textual representation of an IPv6 address port endpoint

User · Accepted Answer

They work almost the same as today  However  be sure you include    around your IP   For example   http    1fff 0 a88 85a3  ac1f  8001 index html  Wikipedia has a pretty good article about IPv6  http   en wikipedia org wiki IPv6 Addressing

User · Answer

They re the same  aren t they  Now I m losing confidence in myself but I really thought IPv6 was just an addressing change  TCP and UDP are still addressed as they are under IPv4

User · Answer

I m pretty certain that ports only have a part in tcp and udp  So it s exactly the same even if you use a new IP protocol

User · Answer

I would say the best reference is Format for Literal IPv6 Addresses in URL s where usage of    is defined    Also  if it is for programming and code  specifically Java  I would suggest this readsClass for Inet6Address java net URL definition where usage of Inet4 address in Inet6 connotation and other cases are presented in details  For my case  IPv4-mapped address Of the form  ffff w x y z  for IPv6 address is used to represent an IPv4 address also solved my problem  It allows the native program to use the same address data structure and also the same socket when communicating with both IPv4 and IPv6 nodes  This is the case on Amazon cloud Linux boxes default setup

User · Answer

They re the same  aren t they  Now I m losing confidence in myself but I really thought IPv6 was just an addressing change  TCP and UDP are still addressed as they are under IPv4

User · Answer

They re the same  aren t they  Now I m losing confidence in myself but I really thought IPv6 was just an addressing change  TCP and UDP are still addressed as they are under IPv4

User · Answer

Wikipedia points out that the syntax of an IPv6 address includes colons and has a short form preventing fixed-length parsing  and therefore you have to delimit the address portion with     This completely avoids the odd parsing errors    Taken from an edit Peter Wone made to the original question

User · Answer

I m pretty certain that ports only have a part in tcp and udp  So it s exactly the same even if you use a new IP protocol

User · Answer

The protocols used in IPv6 are the same as the protocols in IPv4  The only thing that changed between the two versions is the addressing scheme  DHCP  DHCPv6  and ICMP  ICMPv6   So basically  anything TCP UDP related  including the port range  0-65535  remains unchanged   Edit  Port 0 is a reserved port in TCP but it does exist  See RFC793

User · Answer

The protocols used in IPv6 are the same as the protocols in IPv4  The only thing that changed between the two versions is the addressing scheme  DHCP  DHCPv6  and ICMP  ICMPv6   So basically  anything TCP UDP related  including the port range  0-65535  remains unchanged   Edit  Port 0 is a reserved port in TCP but it does exist  See RFC793

User · Answer

I would say the best reference is Format for Literal IPv6 Addresses in URL s where usage of    is defined    Also  if it is for programming and code  specifically Java  I would suggest this readsClass for Inet6Address java net URL definition where usage of Inet4 address in Inet6 connotation and other cases are presented in details  For my case  IPv4-mapped address Of the form  ffff w x y z  for IPv6 address is used to represent an IPv4 address also solved my problem  It allows the native program to use the same address data structure and also the same socket when communicating with both IPv4 and IPv6 nodes  This is the case on Amazon cloud Linux boxes default setup

User · Answer

I m pretty certain that ports only have a part in tcp and udp  So it s exactly the same even if you use a new IP protocol

User · Answer

The protocols used in IPv6 are the same as the protocols in IPv4  The only thing that changed between the two versions is the addressing scheme  DHCP  DHCPv6  and ICMP  ICMPv6   So basically  anything TCP UDP related  including the port range  0-65535  remains unchanged   Edit  Port 0 is a reserved port in TCP but it does exist  See RFC793

User · Answer

They re the same  aren t they  Now I m losing confidence in myself but I really thought IPv6 was just an addressing change  TCP and UDP are still addressed as they are under IPv4

User · Answer

Wikipedia points out that the syntax of an IPv6 address includes colons and has a short form preventing fixed-length parsing  and therefore you have to delimit the address portion with     This completely avoids the odd parsing errors    Taken from an edit Peter Wone made to the original question

User · Answer

The protocols used in IPv6 are the same as the protocols in IPv4  The only thing that changed between the two versions is the addressing scheme  DHCP  DHCPv6  and ICMP  ICMPv6   So basically  anything TCP UDP related  including the port range  0-65535  remains unchanged   Edit  Port 0 is a reserved port in TCP but it does exist  See RFC793

User · Answer

I m pretty certain that ports only have a part in tcp and udp  So it s exactly the same even if you use a new IP protocol

[tcp] How do ports work with IPv6?

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