localhost is a name that Centos resolves.
https://www.liquidweb.com/kb/what-is-localhost
https://forums.centos.org/viewtopic.php?t=47101 discusses how it gets
interpreted/set.
lo and ifconfig does not enter into the discussion.
On 2020-10-12 12:44 p.m., Jason Long wrote:
I disabled IPv6 in CentOS but connect with localhost not affected.
Sent from Yahoo Mail on Android
<https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
On Mon, Oct 12, 2020 at 6:48 PM, Jason Long
<hack3r...@yahoo.com> wrote:
# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:80230 errors:0 dropped:0 overruns:0 frame:0
TX packets:80230 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:13792298 (13.1 MiB) TX bytes:13792298 (13.1 MiB)
You right.
# telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
220 mail.example.net ESMTP Postfix
ehlo 127.0.0.1
250-mail.example.net
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
Which lines of configuration must be change?
On Monday, October 12, 2020, 06:38:42 PM GMT+3:30, IL Ka
<kazakevichi...@gmail.com <mailto:kazakevichi...@gmail.com>> wrote:
" ::1" is a local address for IPv6
"127.[something]" is a local address of IPv4.
https://en.wikipedia.org/wiki/Localhost
My guess is that you didn't include IPv6 address to the list of
"mynetworks", so Postfix can't "trust" it, because
"smtpd_relay_restrictions" is default to: "permit_mynetworks,
permit_sasl_authenticated, defer_unauth_destination", which means
it only relays emails either from "mynetworks" or authenticated users.
"localhost" is resolved to the IPv6 address on CentOS. You can
explicitly disable IPv6:
https://www.tecmint.com/disable-ipv6-in-centos-8/
Or use IPv4 address explicitly: "telnet 127.0.0.1 25".
I'd stay with the latter case.
On Mon, Oct 12, 2020 at 5:55 PM Jason Long <hack3r...@yahoo.com
<mailto:hack3r...@yahoo.com>> wrote:
> Thank you for your reply.
> How can I sure I'm using IPv4 or IPv6?
>
>
> On Monday, October 12, 2020, 06:18:10 PM GMT+3:30, IL Ka
<kazakevichi...@gmail.com <mailto:kazakevichi...@gmail.com>> wrote:
>
>> mynetworks = 127.0.0.0/8, My Public IP
>> Trying ::1...
> It could be that you are using IPv6 to connect while
"mynetworks" is IPv4 address.
> Try "telnet 127.0.0.1 25"
>
--
Ron Wheeler
Artifact Software
438-345-3369
rwhee...@artifact-software.com
