[olug] I seem to have an Omaha Cox Residential IPV6 address

[Lou Duchez]

Also a n00b; I was looking into IPv6 the other to not get caught out in 
the cold when it finally descends on us.

 From what I could tell, of that 128 bit address, the first half 
(roughly) would be permanently assigned to you by your ISP, with no 
practical risk of them running out of IP addresses.  The second half 
would be the part that would come from a DHCP pool, and if it's a 
well-managed pool, it would re-issue the same addresses to the same 
devices unless a conflict arose ... and in IPv6 that shouldn't happen.  
So in theory, IPv6 addresses issued by DHCP should be functionally 
permanent, unless something happens to the DHCP server and it gets amnesia.

I still think it's a bad idea that IPv6 doesn't support NAT, though.  
It's good that IPv6 isn't built to require NAT -- VoIP is a case where 
NAT causes endless problems -- but NAT is darn handy a lot of the time 
too.  When I'm configuring my internal network (servers, printers, etc) 
it's good to keep that independent of the carrier I'm using.  And I 
don't have statistics on it, but I would bet one of the leading reasons 
malware hasn't fried every (non-Linux) computer out there is the 
inherent firewall that you get with NAT.  It's not a complete firewall 
of course, and in some quarters you'd be flayed alive for saying that 
NAT does any firewalling whatsoever; but if there's a thing between my 
computer and the Internet that keeps unsolicited traffic from getting at 
my computer, I'm going to call it a firewall.


> Is there a way to tell how long the lease is on the IPv6 address? I'm also
> in the firmly n00b category here but it seems like with the slightly larger
> space that IPv6 gives then the only time you'd have to get/be given a new
> one is if the company providing the IP is re-jiggering their mapping.
>
> But I could be horribly, horribly confused.
>
> On Fri, Mar 18, 2016 at 2:42 AM, Aric Aasgaard <aric at omahax.com> wrote:
>
>> Well it didn't take me too long to get an IPv6 home network set up with a
>> DHCP /56 allotment tonight.
>> ....now I need to figure out how to dynamically DNS it all up because um I
>> have no clue how to get to all my stuff if all my stuff gets an address
>> change.
>> I'm guessing I can locally statically assign the /56 side of the address if
>> they are going to give me 4,722,366,482,869,645,213,696 IP addresses to use
>> every time.
>>
>> My LAN and WAN addresses only have this part in common 2600:8804 of the
>> 2600:8804::/34  ....but my LAN is getting assigned the consistent /56 I
>> requested.
>> ......I am excited about being a n00b again.
>>
>> -----Original Message-----
>> From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of
>> Lou
>> Duchez
>> Sent: Friday, March 18, 2016 12:00 AM
>> To: Omaha Linux User Group <olug at olug.org>
>> Subject: Re: [olug] I seem to have an Omaha Cox Residential IPV6 address
>>
>> Cool!  Um, I think it's cool anyway.
>>
>> I'm still pretty peevish at IPv6 for not supporting NAT.  The address of my
>> printer should not depend on which carrier I'm using.
>>
>> Used to be I had two different Internet connections at work, and I was able
>> to set up one as the primary and one as the failover. Worked like a dream
>> ... but it would not be possible under IPv6.
>>
>>
>>> Maybe I am late to the party but I just noticed my pfSense box is
>>> getting assigned an IPv6 WAN address via DHCP.
>>> I can ping ipv6.l.google.com with it natively.
>>>
>>>
>>>
>>> PING6(56=40+8+8 bytes) <redacted ipv6 address> -->
>>> 2607:f8b0:4000:801::200e
>>>
>>> 16 bytes from 2607:f8b0:4000:801::200e, icmp_seq=0 hlim=57 time=28.695
>>> ms
>>>
>>> 16 bytes from 2607:f8b0:4000:801::200e, icmp_seq=1 hlim=57 time=25.456
>>> ms
>>>
>>> 16 bytes from 2607:f8b0:4000:801::200e, icmp_seq=2 hlim=57 time=26.253
>>> ms
>>>
>>>
>>>
>>> --- ipv6.l.google.com ping6 statistics ---
>>>
>>> 3 packets transmitted, 3 packets received, 0.0% packet loss
>>>
>>> round-trip min/avg/max/std-dev = 25.456/26.801/28.695/1.378 ms
>>>
>>>
>>>
>>> I need to start learning all of the IPv6 wizardry very soon.
>>>
>>> _______________________________________________
>>> OLUG mailing list
>>> OLUG at olug.org
>>> https://lists.olug.org/mailman/listinfo/olug
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