<div dir="ltr"><div>Q. This reminds me of our customers who use <a href="http://192.25.25.0/24" target="_blank">192.25.25.0/24.</a><br><br></div>Or maybe they bought the whole subnet :)<br><div><a href="http://192.25.25.0/24" target="_blank"></a></div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jan 8, 2014 at 2:46 PM, Justin Goldberg <span dir="ltr"><<a href="mailto:justgold79@gmail.com" target="_blank">justgold79@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">It'd be interesting to see all the private traffic that reaches 128.0.0.0.<br>
<div class="HOEnZb"><div class="h5"><br>
On 1/8/14, Justin Goldberg <<a href="mailto:justgold79@gmail.com">justgold79@gmail.com</a>> wrote:<br>
> This reminds me of our customers who use <a href="http://192.25.25.0/24" target="_blank">192.25.25.0/24</a> and<br>
> <a href="http://100.0.0.0/24" target="_blank">100.0.0.0/24</a> on their LAN, which are public IP addresses. It hasn't<br>
> caused any problems so far. Hah!<br>
><br>
> On 1/8/14, Bugs <<a href="mailto:bugs@solprime.net">bugs@solprime.net</a>> wrote:<br>
>> This is a handy reference of all the current top level /8 allocations.<br>
>><br>
>> <a href="http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml" target="_blank">http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml</a><br>
>><br>
>> On 12/13/2013 09:55 PM, Edward Holcroft wrote:<br>
>>> Came across this from which glean that <a href="http://5.0.0.0/8" target="_blank">5.0.0.0/8</a> <<a href="http://5.0.0.0/8" target="_blank">http://5.0.0.0/8</a>> was<br>
>>> not always publicly allocated:<br>
>>><br>
>>> <a href="http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_10-3/103_awkward.html" target="_blank">http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_10-3/103_awkward.html</a><br>
>>><br>
>>> The literature says it was used until recently by Hamachi<br>
>>> <a href="http://en.wikipedia.org/wiki/Hamachi_(software)" target="_blank">http://en.wikipedia.org/wiki/Hamachi_(software)</a>. I am wondering if one<br>
>>> of my colleagues sneaked in a Hamachi server somewhere on the network<br>
>>> that is handing these IP's to the PPTP clients.<br>
>>><br>
>>> ed<br>
>>><br>
>>><br>
>>><br>
>>> On Fri, Dec 13, 2013 at 5:54 PM, Michael B. Trausch <<a href="mailto:mbt@naunetcorp.com">mbt@naunetcorp.com</a><br>
>>> <mailto:<a href="mailto:mbt@naunetcorp.com">mbt@naunetcorp.com</a>>> wrote:<br>
>>><br>
>>> On 12/13/2013 02:31 PM, Edward Holcroft wrote:<br>
>>>> What is 5.x.x.x? I've never heard of them before and am I allowed<br>
>>>> to use them? More importantly, where are they coming from? I never<br>
>>>> set anything to offer IP's in that range, unless it's some kind of<br>
>>>> default.<br>
>>><br>
>>> The whois utility can tell you a good bit:<br>
>>><br>
>>> * <a href="http://5.0.0.0/8" target="_blank">5.0.0.0/8</a> <<a href="http://5.0.0.0/8" target="_blank">http://5.0.0.0/8</a>> is *allocated* for assignment by<br>
>>> RIPE, meaning that these addresses belong in Europe.<br>
>>> * Various chunks of it are assigned to ISPs and backbone links<br>
>>> (e.g. <a href="http://5.0.0.0/17" target="_blank">5.0.0.0/17</a> <<a href="http://5.0.0.0/17" target="_blank">http://5.0.0.0/17</a>>).<br>
>>><br>
>>> This means that you should absolutely not be using these IP<br>
>>> addresses, as they /will/ conflict with the public Internet.<br>
>>><br>
>>> Verify that the configuration of the server handing out the<br>
>>> addresses is correct; even Microsoft products should not<br>
>>> intentionally be using IP address space that is not allocated to it,<br>
>>> unless some administrator in the admin chain told it to figuring<br>
>>> that it wouldn't hurt anything.<br>
>>><br>
>>> Remember the private IPv4 networks:<br>
>>><br>
>>> 1. <a href="http://10.0.0.0/8" target="_blank">10.0.0.0/8</a> <<a href="http://10.0.0.0/8" target="_blank">http://10.0.0.0/8</a>> if you need something very large.<br>
>>> 2. <a href="http://172.16.0.0/12" target="_blank">172.16.0.0/12</a> <<a href="http://172.16.0.0/12" target="_blank">http://172.16.0.0/12</a>> if you need something<br>
>>> moderately large and nonconflicting.<br>
>>> 3. <a href="http://192.168.0.0/16" target="_blank">192.168.0.0/16</a> <<a href="http://192.168.0.0/16" target="_blank">http://192.168.0.0/16</a>> if you need something<br>
>>> recognizable. I don't use this range anymore, myself.<br>
>>><br>
>>> I also use the TEST-NET-1 through TEST-NET-3 allocations for<br>
>>> LAN-only testing of development apps and systems, but I never deploy<br>
>>> anything with those addresses.<br>
>>><br>
>>> For dial-in and VPN access, you should be using either addresses<br>
>>> assigned to you by your upstream (e.g., your ISP or ARIN), RFC1918<br>
>>> space (one of the three ranges listed above), or assigned, delegated<br>
>>> or organization-local IPv6 addressing.<br>
>>><br>
>>> Ideally, the VPN should be its own routed subnet. This isn't always<br>
>>> possible though, so many VPN servers will actually do proxy-ARP to<br>
>>> make the VPN-connected peers appear to be on the local subnetwork.<br>
>>><br>
>>> — Mike<br>
>>><br>
>>> --<br>
>>> Naunet Corporation Logo Michael B. Trausch<br>
>>><br>
>>> President, *Naunet Corporation*<br>
>>> ☎ <a href="tel:%28678%29%20287-0693%20x130" value="+16782870693">(678) 287-0693 x130</a> <tel:%28678%29%20287-0693%20x130> or (855)<br>
>>> NAUNET-1 x130<br>
>>> FAX: (678) 783-7843 <tel:%28678%29%20783-7843><br>
>>><br>
>>><br>
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>>><br>
>>><br>
>>><br>
>>> --<br>
>>> Edward Holcroft | Madsen Kneppers & Associates Inc.<br>
>>><br>
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>>><br>
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>>><br>
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