Wonder how heavy we can load that... I would want it to be able to handle 8000
connections.
From: Steve Jones
Sent: Monday, January 15, 2018 12:05 PM
To: af@afmug.com
Subject: Re: [AFMUG] IPv4 exhaust again
ccr1072
On Mon, Jan 15, 2018 at 12:59 PM, Chuck McCown <ch...@wbmfg.com> wrote:
What are you using? Router NAT or a server or ?
From: Steve Jones
Sent: Monday, January 15, 2018 11:48 AM
To: af@afmug.com
Subject: Re: [AFMUG] IPv4 exhaust again
Im not going to lie, we are natting at 1:300 across a handful of publics and
have little to no issue, though we really should since the customer router
double NATs
On Mon, Jan 15, 2018 at 12:39 PM, Chuck McCown <ch...@wbmfg.com> wrote:
I need to have about /19 worth of customers natted to as few V4s as is
needed to make it work properly.
We currently have about 3 /21s I think. Don’t want to have to buy a
fourth.
From: Dennis Burgess
Sent: Monday, January 15, 2018 11:34 AM
To: af@afmug.com
Subject: Re: [AFMUG] IPv4 exhaust again
Mikrotik can do that, I have a router with 20k NAT rules natting two /21s
to less than 254 ips .:)
Dennis Burgess – Network Solution Engineer – Consultant
MikroTik Certified Trainer/Consultant – MTCNA, MTCRE, MTCWE, MTCTCE, MTCINE
For Wireless Hardware/Routers visit www.linktechs.net
Radio Frequency Coverages: www.towercoverage.com
Office: 314-735-0270
E-Mail: dmburg...@linktechs.net
From: Af [mailto:af-boun...@afmug.com] On Behalf Of George Skorup
Sent: Monday, January 15, 2018 12:28 PM
To: af@afmug.com
Subject: Re: [AFMUG] IPv4 exhaust again
Dual-stack and CGN? You can get 8:1, 16:1 or even 32:1 out of a single
public IPv4 address. Give 8 customers 8k ports each, or 16 customer 4k ports
each, 32 customers 2k ports each. That's *source* ports, so they're not limited
to 8k, 4k or 2k connections total. You have to look at in both directions.
10.10.10.10:1024 -> 8.8.8.8:53 and 10.10.10.10:1024 -> 8.8.4.4:53 mappings are
both valid, and it obviously goes a lot deeper than that.
Seems to be a whole lot easier than some crazy NAT appliance that's running
the whole network. I haven't done anything like this, but I'm considering it. I
think Juniper even lets you do this with a couple commands? Yeah, I'm too cheap
for that.
Something else to keep in mind is that most consumer grade routers still
have a fairly limited connection table. My Cambium cnPilot router I have at
home lets you adjust the max table size (up to 8192). Most are 2k or 4k. While
even a low-end MikroTik will give you >100k.
On 1/15/2018 11:35 AM, Chuck McCown wrote:
Planning to buy another /21 or some such thing .... again ......
�
So going to attempt to NAT the whole frigging company.
�
Seems like I am going in reverse here.
�
If we can make NAT work for most customers, then that will buy us time to
build our magic V4 translator gateway box for a V6 only network.�
�
Any suggestions on the best way to do this?
