[pfx] Re: ipv6 connection
Jack Raats: > Wietse, > > I run the script every five minutes for more than 13 hours to the DNS > server of Cloudflare (2620:fe::fe). > Four times I had some packet drops (about 25%). Was that network path in any way similar to the path to your MX checker? You can check that with mtr (or traceroute which is much less informative) > I think that cann't explain why postfix is not reachable on ipv6. I think you have proven that some MX checker over some unknown path cannot always reach your Postfix system. I routinely run ping and mtr to monitor my connectivity. If there is packet loss, them mtr will tell me where on the network path that happens. > Can postscreen drop an ipv6 connection? Postfix does not care if a connection is over IPv4 or IPv6. Really. If there is a difference, then that happens at a lower level in the stack. It just happens to be more visible at the application level. Don not shoot the messenger of the bad news. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: ipv6 connection
Wietse, I run the script every five minutes for more than 13 hours to the DNS server of Cloudflare (2620:fe::fe). Four times I had some packet drops (about 25%). I think that cann't explain why postfix is not reachable on ipv6. Can postscreen drop an ipv6 connection? Gr., Jack Op 28-04-2024 om 16:20 schreef Wietse Venema via Postfix-users: Jack Raats via Postfix-users: In the Netherlands but also in other countries you can use internet.nl to test your e-mail and webserver. It test your e-mailserver for ipv6 connectivity, SPF, DMARC and DKIM. My mailserver scores sometimes 100%, but also sometimes lower because it cann't connect postfix on ipv6. In main.cf mynetworks and inet_interfaces has my ipv4 and ipv6 address. inet_protocols = all. In the rest of my configs I'm using my ipv4 address. What is possible wrong in postfix or is it the connection? To monitor your IPv6 connectivity, you could run a cron job that runs a script that pings a well-connected IPv6 address: #!/bin/sh ping -q -c 10 some-ipv6 | loggger -t check-ping -p daemon.info and scan the log every day or so. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: ipv6 connection
Jack Raats via Postfix-users: > In the Netherlands but also in other countries you can use internet.nl > to test your e-mail and webserver. > It test your e-mailserver for ipv6 connectivity, SPF, DMARC and DKIM. > > My mailserver scores sometimes 100%, but also sometimes lower because it > cann't connect postfix on ipv6. > > In main.cf mynetworks and inet_interfaces has my ipv4 and ipv6 address. > inet_protocols = all. > > In the rest of my configs I'm using my ipv4 address. > > What is possible wrong in postfix or is it the connection? To monitor your IPv6 connectivity, you could run a cron job that runs a script that pings a well-connected IPv6 address: #!/bin/sh ping -q -c 10 some-ipv6 | loggger -t check-ping -p daemon.info and scan the log every day or so. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
