Private address and static IP as an commercial offer.
Mark S. Guz
Wed Jun 20 12:04:13 CEST 2001
Alex French wrote: > > At 08:48 18/06/2001, Randy Bush wrote: > > > The policy is "tell people that NAT exists, explain to them what the > > > benefits are > > > >what benefits are there? > > In practice, a major benefit to using NAT is that it doesn't require the > co-operation of either the ISP or the registry. For many small/medium > enterprises, the turnaround time and extra form filling to obtain an > assignment aren't worth it, especially when combined with the other > benefits to NAT mentioned here. > > Alex. Hello all, Working for an ISP I find that NAT is advantageous over legitimate addressing for several reasons. The first is that which Alex mentioned, no paperwork = no delay. The wait queue at the Ripe NCC can be lengthy sometimes. Secondly, address space conservation, as far as our own /19 allocation is concerned we can more effectively use this space for those that truly need legitimate address space. The majority of commercial connections need at best a /29 or /28 for a mail server and or a web server the rest of their lan is usually either behind a firewall or nat'd on the router. Thirdly security. We used double NAT for firewalling customers, meaning the firewall is nat'd at the router and the local lan is nat'd behind the firewall. With access lists on the router this increases the security by adding more layers to the security model, rather than hard shell soft centre. I always ask the customer to think about what they really need legitimate addressing for. 99% of the time they just have no need for public address space. just my 2p's worth! (or 2cents or .02 euros worth) -- Mark S. Guz Senior System/Network Engineer IT Scotland On Line Technology Park Gemini Crescent Dundee DD2 1SW Tel + 44 (0) 1382 429000 Fax + 44 (0) 1382 429001 http://www.scotlandonline.co.uk This message is confidential and may contain privileged information. You should not disclose its contents to any other person. If you are not the intended recipient, please notify the sender named above immediately. It is expressly declared that this e-mail does not constitute nor form part of a contract or unilateral obligation. Opinions, conclusions and other information in this message that do not relate to the official business of Scotland On Line Limited shall be understood as neither given nor endorsed by it.
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