[ale] 5.x.x.x IP range

[Justin Goldberg]

It'd be interesting to see all the private traffic that reaches 128.0.0.0.

On 1/8/14, Justin Goldberg <justgold79 at gmail.com> wrote:
> This reminds me of our customers who use 192.25.25.0/24 and
> 100.0.0.0/24 on their LAN, which are public IP addresses. It hasn't
> caused any problems so far. Hah!
>
> On 1/8/14, Bugs <bugs at solprime.net> wrote:
>> This is a handy reference of all the current top level /8 allocations.
>>
>> http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml
>>
>> On 12/13/2013 09:55 PM, Edward Holcroft wrote:
>>> Came across this from which  glean that 5.0.0.0/8 <http://5.0.0.0/8> was
>>> not always publicly allocated:
>>>
>>> http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_10-3/103_awkward.html
>>>
>>> The literature says it was used until recently by Hamachi
>>> http://en.wikipedia.org/wiki/Hamachi_(software). I am wondering if one
>>> of my colleagues sneaked in a Hamachi server somewhere on the network
>>> that is handing these IP's to the PPTP clients.
>>>
>>> ed
>>>
>>>
>>>
>>> On Fri, Dec 13, 2013 at 5:54 PM, Michael B. Trausch <mbt at naunetcorp.com
>>> <mailto:mbt at naunetcorp.com>> wrote:
>>>
>>>     On 12/13/2013 02:31 PM, Edward Holcroft wrote:
>>>>     What is 5.x.x.x? I've never heard of them before and am I allowed
>>>>     to use them? More importantly, where are they coming from? I never
>>>>     set anything to offer IP's in that range, unless it's some kind of
>>>>     default.
>>>
>>>     The whois utility can tell you a good bit:
>>>
>>>       * 5.0.0.0/8 <http://5.0.0.0/8> is *allocated* for assignment by
>>>         RIPE, meaning that these addresses belong in Europe.
>>>       * Various chunks of it are assigned to ISPs and backbone links
>>>         (e.g. 5.0.0.0/17 <http://5.0.0.0/17>).
>>>
>>>     This means that you should absolutely not be using these IP
>>>     addresses, as they /will/ conflict with the public Internet.
>>>
>>>     Verify that the configuration of the server handing out the
>>>     addresses is correct; even Microsoft products should not
>>>     intentionally be using IP address space that is not allocated to it,
>>>     unless some administrator in the admin chain told it to figuring
>>>     that it wouldn't hurt anything.
>>>
>>>     Remember the private IPv4 networks:
>>>
>>>      1. 10.0.0.0/8 <http://10.0.0.0/8> if you need something very large.
>>>      2. 172.16.0.0/12 <http://172.16.0.0/12> if you need something
>>>         moderately large and nonconflicting.
>>>      3. 192.168.0.0/16 <http://192.168.0.0/16> if you need something
>>>         recognizable.  I don't use this range anymore, myself.
>>>
>>>     I also use the TEST-NET-1 through TEST-NET-3 allocations for
>>>     LAN-only testing of development apps and systems, but I never deploy
>>>     anything with those addresses.
>>>
>>>     For dial-in and VPN access, you should be using either addresses
>>>     assigned to you by your upstream (e.g., your ISP or ARIN), RFC1918
>>>     space (one of the three ranges listed above), or assigned, delegated
>>>     or organization-local IPv6 addressing.
>>>
>>>     Ideally, the VPN should be its own routed subnet.  This isn't always
>>>     possible though, so many VPN servers will actually do proxy-ARP to
>>>     make the VPN-connected peers appear to be on the local subnetwork.
>>>
>>>         — Mike
>>>
>>>     --
>>>     Naunet Corporation Logo 	Michael B. Trausch
>>>
>>>     President, *Naunet Corporation*
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>>>     NAUNET-1 x130
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>>>
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>>>
>>>
>>> --
>>> Edward Holcroft | Madsen Kneppers & Associates Inc.
>>>
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>>>
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>>>
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