This is == General Information ===== IPv4 ===Most Internet-connected computers communicate using Internet Protocol version 4, usually abbreviated IPv4. IPv4 assigns an attempt address to document VTLUUG's overly complex each computer. These addresses are 32 bits long, and can be written as a period-separated list of four numbers from zero to 255. One example would be 192.168.1.1, an address commonly given to home networking setupequipment. Apologies The 32-bit address space of IPv4 allows for about four billion addresses. Given that there are over six billion people on the disorganizationplanet,this is mainly just a it's clear that these addresses will eventually run out. It turns out that due to the way to get everything these addresses are allocated in one placeblocks, we actually already have run out. --[[User:Mjh|Mjh]] ([[User talk:Mjh|talk]]) 21:43, 28 December 2014 (EST
Note: This === IPv6 ===Enter IP version 6, or IPv6. IPv6 uses 128 bits for each address, but is extraordinarily datednot yet very widely used. Revisions are in progressVirginia Tech, but currentlybeing the cutting edge institution it is, do already supports IPv6 campus-wide. While this does not consider it directly affect your computing experience, connecting your computer to a native IPv6 networks has a few implications you should beremotely correctaware of. --[[User:echarlie|echarlie]]
=== Limitations Stateless Autoconfiguration and Privacy Extensions ===We have a single 100 Mbps CNS port, which comes with the following limitations:* Only one MAC address may appear on the port at a time (port security)* There is no prefix delegation for IPv6, so each address must be individually requested via NDP.
This means we must:* Use ARP proxying In IPv4, a computer would need to be told its address either manually or 1-by using a network service called DHCP. In DHCP, the computer asks a server to-1 NAT for IPv4* Use assign it an NDP proxy for IPv6IP address that is not in use by anyone else.
=== CVL setup(deprecated) ===Hardware:* In IPv6, the address space is so large that a mechanism called "luugtempstateless autoconfiguration" or "temp88191": can be used. In stateless autoconfiguration, a computer asks a Poweredge 2650 with 2 NICs configured as an Ubuntu nearby router* 8-port Gigabit unmanaged switch* 48-port 100 Mbps managed switch for the network prefix (attached the first few digits of the IP address that will be the same for all computers on the network), and then the computer fills in the rest of the bits by using the hardware address of the network adapter. This means that by default, your IP address could be used to sunway)uniquely identify your computer anywhere on the Internet, threatening your privacy online.
Port security evasion:== Current ==* A bash script named "Nat" which presumably does 1-to-1 NAT* NDP proxying via httpsSee [[Infrastructure://npd6.github.io/npd6/** This is broken an misconfigured. It doesn't properly add routes. Network]]
IPs / networks:* temp88191 is 10.0.0.1/8 and 128.173.88.191. It provides DHCP on our internal interface* Sunway has static IPs setup (10.0.97.10 to 10.0.97.28)* Rackable servers: joey (10.0.4.10) and phantomphreak (10.0.4.11)* cyberdelia's IPv4 is luug0.ece.vt.edu** Port 9001 <-> 10.0.1.3 (cerealkiller)** Port 9030 <-> 10.0.1.3 (cerealkiller)* wood's IPv4 is luug1.ece.vt.edu* milton's IPv4 is luug2.ece.vt.edu* luug3.ece.vt.edu is (in theory) used by westinghouse (sunway's head node)* acidburn's IPv4 is luug.ece.vt.edu* acidburn has iodine configured as a DNS tunnel (10.152.78.1/27)* Other tenants of our router: mjh.ece.vt.edu and mirror.ece.vt.edu * 10.99.0.2/24 appears to be statically assigned to wood's guests. Cyberdelia VMs - assigned 10.0.1.1/24 (not actually a separate subnet):* dhcp-host=52:54:00:14:df:c2,10.0.1.1 # "mail" (not yet configured)* dhcp-host=52:54:00:68:81:33,10.0.1.2 # crashoverride 2.0* dhcp-host=52:54:00:40:9a:55,10.0.1.3 # Cerealkiller 2.0 === Desired Setup See Also ===This is what I'm hoping to migrate us to:* OpenWrt ([https[Infrastructure://github.com/sbyx/odhcpd odhcpdNetwork#DNS|DNS]] has built-in NDP proxying)* An internal network smaller than a /8 (room for expansion)* IPsec (point-to-point and road warrior for users)* Each VM host has a bridged ethernet port with a global IPv4 address and performs NAT to its VMs. Additional IPv4s are assigned as VMs as needed (e.g. milton and acidburn probably need their own)* All internal IPv4 addresses are static leases assigned by temp88191 or set statically '''and documented somewhere'''; hypervisors do not have their own networks unnecessarily like wood currently does.* Each device has a global IPv6 address[[Deprecated Network]]
[[Category:Infrastructure]]