If it's definitely FTPS (as opposed to SSH-based SFTP) it looks like that needs ports 990 and 989.
https://en.wikipedia.org/wiki/FTPS You've already mostly discounted tethering as a cause. So it's probably either firewall or potential certificate-related. Does the working system have anything additional configured in terms of Certificate Authority? Compare / contrast /etc/pki/ca-trust/ between the systems. Compare the output of `firewall-cmd --list-all` between the hosts. You haven't said what error Filezilla gives when it fails to work. You might also want to compare the Filezilla logs between the working and failing system: https://wiki.filezilla-project.org/Logs Or get command-line FTPS working in the hopes that it gives you clearer failure messages in the event that connections fail. On Wed, 9 Oct 2024 at 14:27, Tim via users <[email protected]> wrote: > Hi, > > Trying different PCs and different connections (and firewall > configurations) I can cause Filezilla to not be able to connect to a > FTP server outside my LAN on one of them when the PC is connected > through USB tethering on my mobile phone. Yet, another one works with > the same USB tethered phone. > > It's a server that requires FTP over TLS. Does that scheme require any > special firewall tweaking on a client PC or any special networking > issues? I haven't managed to narrow down what's different one on from > the other. > > -- > > uname -rsvp > Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 > x86_64 > > Boilerplate: All unexpected mail to my mailbox is automatically deleted. > I will only get to see the messages that are posted to the mailing list. > > > -- > _______________________________________________ > users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/[email protected] > Do not reply to spam, report it: > https://pagure.io/fedora-infrastructure/new_issue >
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