Fixing "COMMAND_FAILED: 'python-nftables' failed: netlink: Error: Could not process rule: No buffer space available" Error

September 5, 2023(September 5, 2023)

Introduction # I recently ran into a baffling error while configuring firewalld on my system: COMMAND_FAILED: 'python-nftables' failed: netlink: Error: Could not process rule: No buffer space available. Here’s how I diagnosed and resolved the issue. When Did I Encounter This Error? # This annoying message popped up when I was Configuring firewalld. Diagnosis # After some digging, I found that the issue was likely related to the net.core.rmem_max and possibly net. ...