SSH/SFTP Timeouts Solved by CSF Restart

vatra

• May 16, 2026 23:41

I'm experiencing intermittent SSH/SFTP timeouts on an AlmaLinux server running cPanel/WHM with the latest CSF fork. Once I run csf -r, the issue is temporarily resolved, and I can log back in.

During the issue, sshd is still listening normally, and the CSF does not block my IP. I also noticed the system reports iptables-legacy tables present while nftables.service is active at the same time. Is cPanel/CSF expected to run with nftables enabled on AlmaLinux, or could this mixed nftables/iptables environment cause intermittent connection issues and state desynchronization?

Would you recommend disabling nftables.service when using CSF on AlmaLinux?

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  cPRex Jurassic Moderator

  • May 26, 2026 14:13

  Hey there!  In general, yes, you can disable nftables.service when running CSF, as that could lead to conflicts exactly like what you're seeing.

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  vatra

  • May 29, 2026 08:30

  Thank you! I disabled it and will report if any issues arise.

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