nanog mailing list archives
Re: if not v6, what?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Wed, 8 Sep 2021 01:34:39 +0900
Michael Thomas wrote:
I looked up CGN's this morning and the thing that struck me the most was losing port forwarding. It's probably a small thing to most people but losing it means to get an incoming session it always has to be mediated by something on the outside.
So, to receive mails at home, we need forwarding of well known SMTP port (25) or an external SMTP server.
So is there anything we could have done different?
As for well known port, we can specify non-default port numbers in URLs (I'm not sure whether it works for mailto: or not) or. in the future, things like DNS SRV RRs should be helpful. Then, to run servers at home, we only need some not-well-known ports forwarded, which can be default or value added service of your local ISP, just like fixed IP addresses today. > Even if we bolted two more bytes onto an IPv4 address > and nothing more, would that have been adopted either? Nothing more? We may even develop transport protocols with 32 bit port numbers, which is a lot easier to deploy than IPv6. Masataka Ohta
Current thread:
- Re: IPv6 woes - RFC, (continued)
- Re: IPv6 woes - RFC Niels Bakker (Sep 08)
- Re: IPv6 woes - RFC Owen DeLong via NANOG (Sep 08)
- Re: IPv6 woes - RFC Bjørn Mork (Sep 10)
- Re: IPv6 woes - RFC Mark Andrews (Sep 10)
- Re: IPv6 woes - RFC Owen DeLong via NANOG (Sep 19)
- Re: IPv6 woes - RFC sronan (Sep 06)
- if not v6, what? Michael Thomas (Sep 05)
- Re: if not v6, what? Grant Taylor via NANOG (Sep 05)
- Re: if not v6, what? Eric Kuhnke (Sep 07)
- Re: if not v6, what? Mark Tinka (Sep 07)
- Re: if not v6, what? Masataka Ohta (Sep 07)
- Re: if not v6, what? Niels Bakker (Sep 07)
- Re: fun with ports, was if not v6, what? John Levine (Sep 07)
- Re: if not v6, what? Masataka Ohta (Sep 07)
- Re: if not v6, what? Mark Andrews (Sep 07)
- Re: if not v6, what? Masataka Ohta (Sep 08)
- Re: if not v6, what? Owen DeLong via NANOG (Sep 08)
- Re: IPv6 woes - RFC Carsten Bormann (Sep 04)
- Re: IPv6 woes - RFC Grant Taylor via NANOG (Sep 05)
- Re: IPv6 woes - RFC Grant Taylor via NANOG (Sep 05)