Noted with thanks On Thu, 26 Aug 2021 at 00:53, Gerald Galster <list+post...@gcore.biz> wrote: > > > > Add the following firewall rules to /etc/sysconfig/iptables. This is > > to open ports for services/daemons listening on TCP ports 25, 465, and > > 587. > > /etc/sysconfig/iptables sounds like RHEL/CentOS, on Debian it might be > /etc/iptables/rules.v4 or rules.v6 > > > -A INPUT ! -i lo -p tcp -m state --state NEW -m tcp --dport 25 -j ACCEPT > > /etc/sysconfig/iptables is for ipv4 only, if your server is reachable > via ipv6 don't forget to add rules to /etc/sysconfig/ip6tables > > In case you have ipv6 and use ipv4 only you can configure "inet_protocols" > in main.cf. > > > Reload firewall rules. > > > > # service iptables restart > > This works for compatibility reasons, RHEL 7/8 redirects this to > systemctl restart iptables > > Best regards > Gerald
-----BEGIN EMAIL SIGNATURE----- The Gospel for all Targeted Individuals (TIs): [The New York Times] Microwave Weapons Are Prime Suspect in Ills of U.S. Embassy Workers Link: https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html ******************************************************************************************** Singaporean Targeted Individual Mr. Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 14 Feb 2019 and refugee seeking attempts at the United Nations Refugee Agency Bangkok (21 Mar 2017), in Taiwan (5 Aug 2019) and Australia (25 Dec 2019 to 9 Jan 2020): [1] https://tdtemcerts.wordpress.com/ [2] https://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming -----END EMAIL SIGNATURE-----
