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

[Bugs]

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*
>     ☎ (678) 287-0693 x130 <tel:%28678%29%20287-0693%20x130> or (855)
>     NAUNET-1 x130
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> 
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> 
> -- 
> Edward Holcroft | Madsen Kneppers & Associates Inc.
> 
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