223 lines
11 KiB
Org Mode
223 lines
11 KiB
Org Mode
* Time table / log
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| When? | What? | Notes |
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| 2019-02-21 | Kick-Off | x |
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| | Finish all admin points | x |
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| | Know when/how to coordinate | x |
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| 2019-02-21 | Clarifications Ueli Maurer (Mentor) | x |
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| | Write mail / phone | x |
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| 2019-02-22 | Have all papers handed in | |
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| 2019-02-23 | python2 / ipaddress is buggy | |
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| | p4utils is python2 only support | |
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| | bmpy_utils is not installable with pip | |
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| | python2 / latest ipaddress==1.0.22 still has the bug | |
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| | ipaddress.ip_network("2001:db8:61::/64") | |
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| | IPv6Network(u'3230:3031:3a64:6238:3a36:313a:3a2f:3634/128') | |
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| 2019-02-28 | Meet Laurent #2 | |
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| | - Parser for all protocols (udp,tcp,icmp,icmp6) | |
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| 2019-02-22 | Have rough definition of tasks | |
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| 2019-03-01 | Feature list / priority list / roadmap clear | |
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| 2019-03-08 | NAT46 1:1 table TCP/UDP working | |
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| 2019-03-15 | NAT46 1:1 table ICMP, ICMPv6 working | |
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| | Will need some switch local ip addresses | |
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| 2019-03-29 | Jool SIIT / range / offset support https://www.jool.mx/en/run-vanilla.html | |
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| | Jool EAMT support https://www.jool.mx/en/run-eam.html | |
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| | Bidirectional support | |
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| | Will need IPv6 embedding suport https://tools.ietf.org/html/rfc6052 | |
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| 2019-04-05 | NAT64 prefix based IPv6->IPv4 conversion [tayga] | |
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| | Use case: IPv6 hosts send to specific /96 | |
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| 2019-04-19 | NAT64 dynamic pool implementation: n:m ipv6 to ipv4 mapping | |
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| | And n:1 stateful mappings https://www.jool.mx/en/run-nat64.html | |
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| | Needs active controller | |
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| | Needs timeout / leases | |
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| 2019-05-10 | Benmarking results between P4, Jool, Tayga | |
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| | Real hardware of advantage | |
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| 2019-08-01 | Latest start writing documentation | |
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| 2019-08-21 | hand in thesis | |
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* Topics / Tasks
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** Admin
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*** DONE Clarify PDF / form with Denise Spicher: free form description
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*** TODO Create task description to be handed in mystudies
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*** DONE Create list of tasks / initial brainstorming
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*** TODO Get OK from Ueli Maurer that thesis is valid in Information Security Area
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*** TODO Find out how-when-whom-where to meet / define schedule
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*** TODO Latex and/or org-mode for the thesis?
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*** TODO Add initial milestones
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**** 180d plan
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**** 25w
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** Thesis implementation
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*** DONE Setup test VM for P4: 2a0a:e5c0:2:12:400:f0ff:fea9:c3e3
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*** DONE Get feature list of jool
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*** DONE Get feature list of tayga
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*** DONE Setup P4 base / structure
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*** DONE Create minimal controller for populating tables
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*** TODO Checkout / review egress settings
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*** TODO Implement ICMP <-> ICMP6 translation
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**** DONE Parse icmp
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**** DONE Parse icmpv6
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**** TODO Add (static) egress configuration
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**** TODO Translate icmp <-> icmp6
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**** TODO Create table entry for mapping v4->v6 [net]
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**** TODO Create table entry for mapping v6->v4 [net]
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*** TODO Setup test VM [dual stack] for Jool:
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*** TODO Setup test VM [dual stack] for tayga:
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*** NAT64/NAT46 Features in jool and tayga
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**** TODO Static 1:1 NAT46: translate from IPv4 to IPv6 with a table
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***** TODO TCP
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***** TODO UDP
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***** TODO ICMP <-> ICMPv6
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**** TODO Stateless Prefix based NAT64: IPv6 to IPv4 translation prefix based
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***** Allows IPv6 hosts to reach the IPv4 Internet
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**** See time table above
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*** Additional features queue (to be discussed)
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**** TODO Offset based translation (v4->v6) -> same as range (?)
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**** TODO IP address learning (v6/v4) for real life switch?
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** Thesis documentation
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*** Motivation
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TBD
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*** Translation mechanisms
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- v4 to v6 / vice versa
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- Stateful / stateless
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- static / dynamic
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**** Explicit Address Mappings Table (EAMT)
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Range based mapping tables
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See https://www.jool.mx/en/eamt.html,
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https://tools.ietf.org/html/rfc7757
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*** Current state of the art tayga/jool
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TBD
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**** Tayga
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- Single threaded
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- Multi threaded work started due to initiative of ungleich /
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Chrisrock [IPv6.chat]
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**** Jool
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- EAMT bidirectional only (!)
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IPtables interaction
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```
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user@T:~# # Create a Jool iptables instance named "example."
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user@T:~# # Also, establish that the IPv6 representation of any IPv4 address should be
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user@T:~# # `2001:db8::<IPv4 address>`. (See sections below for examples.)
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user@T:~# jool_siit instance add "example" --iptables --pool6 2001:db8::/96
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user@T:~#
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user@T:~# # Tell iptables which traffic should be handled by our newly-created instance:
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user@T:~#
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user@T:~# # IPv6: only packets from 2001:db8::198.51.100.8/125 to 2001:db8::192.0.2
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user@T:~# ip6tables -t mangle -A PREROUTING \
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> -s 2001:db8::198.51.100.8/125 -d 2001:db8::192.0.2.0/120 \
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> -j JOOL_SIIT --instance "example"
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user@T:~# # IPv4: Only packets from 192.0.2 to 198.51.100.8/29
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user@T:~# iptables -t mangle -A PREROUTING \
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> -s 192.0.2.0/24 -d 198.51.100.8/29 \
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> -j JOOL_SIIT --instance "example"
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```
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5656
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**** Cisco (?)
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*** P4 based implementation
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TBD
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**** General
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- IPv6 subnet 2001:db8::/32
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- IPv6 hosts are in 2001:db8:6::/64
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- IPv6 default router (::/0) is 2001:db8:6::42/64
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- IPv4 mapped Internet "NAT64 prefix" 2001:db8:4444::/96 (should
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go into a table)
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- IPv4 hosts are in 10.0.4.0/24
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- IPv6 in IPv4 mapped hosts are in 10.0.6.0/24
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- IPv4 default router = 10.0.0.42
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**** Static mappings
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- likely need table(s)
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- need tcp & udp translation
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***** Hosts
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****** Left side: IPv6
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****** Right side: IPv4
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**** Requirements
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-
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*** Performance comparison
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*** Feature/Functionality difference / overview
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**** Not included
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- DNS64 - has already been solved in a different domain
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*** References / Follow up
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**** RFC 6052: https://tools.ietf.org/html/rfc6052 IPv6 Addressing of IPv4/IPv6 Translators
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**** RFC 6586 for deployment experiences using Stateful NAT64.
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**** RFC 7757 Explicit Address Mappings for Stateless IP/ICMP Translation
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**** EAMT/Jool: https://www.jool.mx/en/eamt.html
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* Proposal / task description
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** Task description for mystudies
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*** High speed NAT64 with P4
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Currently there are two main open source NAT64 solution available:
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tayga and jool. The former is a single threaded, cpu bound user
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space solution, the latter a custom Linux kernel module.
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This thesis challenges this status quo by developing a P4 based
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solution supporting all features of jool/tayga and comparing the
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performance, security and adaptivity of the solutions.
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- Milestone 1: Stateless NAT64/NAT46 translations in P4
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- Milestone 2: Stateful (dynamic) NAT64/NAT46 translations
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- Milestone 3: Hardware adaption
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** Original ideas
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Proposal 1: Automating NAT64 with P4
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In IPv6 only data centers IPv4 connectivity is still a business
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requirement. Current state of the art methods include layer 7 proxying
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or static assignments. both featuring static assignments.
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A flexible, dynamic assignment of IPv4 addresses to IPv6 hosts, similar
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to lease times in DHCPv4 and prefix delegations in DHCPv6 could reduce
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the pressure on IPv4 addresses.
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I would suggest the develop of a new protocol (likely UDP embedded) that
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allows hosts to request on-network support for IPv4 addresses. As IPv4
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addresses have to be treated as "expensive", an accounting metric has to
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be introduced. While in the business world this is usually related to
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money, in the network world IPv4 users could be paying the network by
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(reduced) bandwidth.
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If such a metric existed, devices attached to the network could also try
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to negotiate and wait for using IPv4, when the price / penality for IPv4
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is low (this might be very suitable for mail exchangers for instance).
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Proposal 2: High speed NAT64 with P4
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Currently there are two main open source NAT64 solution available:
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tayga[0] and jool[1]. The former is a single threaded, cpu bound user
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space solution, the latter a custom Linux kernel module.
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I would like to challenge this status quo and develop a P4 based
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solution supporting all features of jool/tayga and comparing the
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performance and adaptivity of the solutions.
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[0] http://www.litech.org/tayga/
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[1] https://www.jool.mx/en/index.html
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Proposal 3: Challenging the status quo with IPv10
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The de facto standard in networking is to treat IPv4
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and IPv6 as "impossible to combine". This proposal is
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to challenge this notion with three different methods:
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- Extensions to IPv4 to request remote IPv6 transport
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- Extensions to IPv6 to request remote IPv4 transport
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- Support in network equipment to handle the extensions
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As the IPv4 header does not allow embedding IPv6 addresses due to size
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limitations, embedding the destination address in a secondary header
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might be necessary (possibly encapsulated in UDP).
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