[ale] 5.x.x.x IP range
Boris Borisov
bugyatl at gmail.com
Wed Jan 8 15:22:32 EST 2014
Q. This reminds me of our customers who use
192.25.25.0/24.<http://192.25.25.0/24>
Or maybe they bought the whole subnet :)
<http://192.25.25.0/24>
On Wed, Jan 8, 2014 at 2:46 PM, Justin Goldberg <justgold79 at gmail.com>wrote:
> 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*
> >>> ☎ (678) 287-0693 x130 <tel:%28678%29%20287-0693%20x130> or (855)
> >>> NAUNET-1 x130
> >>> FAX: (678) 783-7843 <tel:%28678%29%20783-7843>
> >>>
> >>>
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> >>>
> >>>
> >>> --
> >>> Edward Holcroft | Madsen Kneppers & Associates Inc.
> >>>
> >>> 11695 Johns Creek Parkway, Suite 250 | Johns Creek, GA 30097
> >>>
> >>> O (770) 446-9606 | M (770) 630-0949
> >>>
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