2018-01-30 15:22 GMT+03:00 Bill Shirley <b...@knoxvillechristian.org>:

> On the new Postfix server, are you using DHCP client on the WAN interface
> to get a IP address?  You should not be.  You should assign your public
> address
> to the WAN interface.
>
> I have static addresses with my ISP.  My ISP's modem will hand out private
> addresses
> if I use DHCP client.  I don't configure my server to use DHCP; I have it
> set up to
> use the public address.
>
> Bill


>

>
> On 1/30/2018 4:03 AM, Matus UHLAR - fantomas wrote:
>
>> On 30.01.18 00:09, jin&hitman&Barracuda wrote:
>>
>>> In-Reply-To: <CALdev8cxN8Fc5Ej4ZNTieLPoKC-8
>>> fvozze6wt00b5qzpeqf...@mail.gmail.com>
>>> References: <caldev8f6dsgwbzsav21rtekxd69lgrnwvrd1tgkapyhufsx...@mail.gm
>>> ail.com>
>>> <CALdev8fMW22bRAnyDYsRbcqjAcNUitUUqB=wcef0-o7jgaq...@mail.gmail.com>
>>>
>>
>> hell, how did you create this e-mail? it looks like reply to thread with
>> another 9 e-mails.  (Plese send new post when asking new question)
>>
>> We are tring to move our mx server to another isp. They gave us an IP
>>> address but there is some strange points. When i try to connect any mail
>>> related port on that ip, it send my connection to our new postfix server.
>>>
>>
>> this is expected, isn't it?
>>
>> There is a destination nat on it. It is strange becouse i can't see my
>>> actual source ip. I tried with many different hosts and It looks like
>>> there
>>> is a source nat and i saw same ip as my source ip wherever i try.
>>>
>>
>> this is also expected, when you have server on network with private IPs.
>>
>> From new postfix server,  when i try to reach any server on internet, i
>>> see
>>> another ip address on the source ip field and it is fixed too.
>>>
>>> I believe there is a mistake. Could it be feasible two different ip for
>>> incoming and outgoing on one mx server ?
>>>
>>
>> it's apparently a mistake, but might not be a problem. the incoming IP
>> and outgoing IP don't need be the same, although it's
>> easier when they are.
>>
>> On 30 Jan 2018 12:56 a.m., "Kevin A. McGrail" <kmcgr...@pccc.com> wrote:
>>> With NAT it could definitely be possible.  What's your machines local ip
>>> address with ifconfig?  Is it a reserved private address?
>>>
>>
>> On 30.01.18 01:03, jin&hitman&Barracuda wrote:
>>
>>> It is 192.168.34.30/24
>>>
>>
>> this is a private address, not visible in the internet.
>>
>> 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
>>>
>>
>> this is also a private address and it should not appear in the public
>> internet. Should not be a problem between servers.
>>
>> 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.
>>
>> let's clear things up:
>>
>> - which IP do you have when mailing to the outside?
>> - which IP you have to connect from outside in order to get to your mail
>> server?
>>
>>
>
Hi Bill

No, there is no DHCP. All I have is one interface and it's it has a fixed
IP address (192.168.34.30)





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