2018-01-30 14:16 GMT+03:00 Matus UHLAR - fantomas <uh...@fantomas.sk>:
> On 30 Jan 2018 3:43 a.m., "Paul" <p...@netpresto.co.uk> wrote: >>> >>>> What is the source IP you see making connections to your new postfix >>>>>> server ? >>>>>> >>>>> > On 30.01.18 09:28, jin&hitman&Barracuda wrote: >>>>> >>>>>> It is 172.27.203.20 >>>>>> >>>>> > 2018-01-30 12:03 GMT+03:00 Matus UHLAR - fantomas <uh...@fantomas.sk>: >>> >>>> If you see this IP when you connect to your postfix from the internet, >>>>> complain to your new ISP immediately. Connections from outside should >>>>> not be NATted. >>>>> >>>> > 2018-01-30 13:29 GMT+03:00 Matus UHLAR - fantomas <uh...@fantomas.sk>: >> >>> once again, when you connect from outside to 213.14.BBB.59, do you see >>> the connection coming from 172.27.203.20? >>> >> > On 30.01.18 14:07, jin&hitman&Barracuda wrote: > >> Sorry I missed your questions. >> > > not misread, you have answered them properly. > > Yes I saw connections coming >> from 172.27.203.20 and it was me. >> > > it was you in what way? were you connecting from inside IP (192.168.*) to > your public IP (213.14.BBB.59) and saw the connection coming from > 172.27.203.20? > > That one is called NAT loobback and is required in such case. > In this case, 172.27.203.20 only means that the real source is in your > internal network. > > The real problem happens, when you connect from the internet IP and will > see > 172.27.203.20 there. > > Which IP you see connecting on your mail server, when you connect from the > internet? > > -- > Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ > Warning: I wish NOT to receive e-mail advertising to this address. > Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. > Linux - It's now safe to turn on your computer. > Linux - Teraz mozete pocitac bez obav zapnut. > > Which IP you see connecting on your mail server, when you connect from the > internet? When I connecting from internet (for example from 149.XXX.164.55) I did run tcpdump command on postfix server and all incoming connections have same source IP and it is 172.27.203.20. I doesn't matter where I choose to connect I see same IP as source. > it was you in what way? were you connecting from inside IP (192.168.*) to > your public IP (213.14.BBB.59) and saw the connection coming from > 172.27.203.20? No, not inside in postfix server's network. I tried from outside. The new postfix is not running as prod. Still testing and no DNS record published yet. There is only me. -- *There is no place like "/home"* *From HemiB A R R A C U D A !*
