Author Topic: postfix force ipv4  (Read 1873 times)

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postfix force ipv4
« on: September 21, 2020, 02:18:23 PM »
 inet_protocols = ipv4 will not allow restart postfix.

Update: I confused protocols with interfaces
« Last Edit: September 21, 2020, 02:31:21 PM by Namaste »
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Re: postfix force ipv4
« Reply #1 on: September 21, 2020, 02:27:35 PM »
Se7p 21 10:24:30 server.foreveryours.us postfix[6753]: fatal: config variable inet_interfaces: host not found: ipv4
Sep 21 10:24:31 server.foreveryours.us systemd[1]: postfix.service: control process exited, code=exited status=1
Sep 21 10:24:31 server.foreveryours.us systemd[1]: Failed to start Postfix Mail Transport Agent.
-- Subject: Unit postfix.service has failed
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Re: postfix force ipv4
« Reply #2 on: September 22, 2020, 08:40:16 AM »
Edit /etc/sysctl.conf and add the following at the end of the file.

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

After, run the command:

sysctl -p
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Re: postfix force ipv4
« Reply #3 on: December 20, 2020, 11:18:34 PM »
Its really really really important to set

inet_protocols = ipv4

in postfix config file....../etc/postfix
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Re: postfix force ipv4
« Reply #4 on: December 21, 2020, 01:27:40 PM »
Studio4host showed how to disable IPv6 absolutely, Postfix will use IPv4 only in this case.
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