uninstall opensnitch test

[tttjhgan]

Describe the issue

OpenSnitch installs nftables rules using an inet table named opensnitch and uses NFQUEUE (e.g. queue ... flags bypass to 0).
I need to confirm whether OpenSnitch changes or interferes with existing firewall policies (firewalld and/or iptables),
and what happens after stopping or uninstalling OpenSnitch (whether the system returns to a clean state).

Why this matters

On servers with existing firewall rules (business allow/deny logic), it is critical to ensure that:

1. Existing firewalld / iptables rules keep working as before.
2. After systemctl stop opensnitchd, OpenSnitch does not continue intercepting traffic.
3. After deleting/uninstalling OpenSnitch, all nftables artifacts introduced by OpenSnitch are fully removed
   (no leftover tables/chains/queues/hooks), and firewall behavior returns to normal.

Environment / Versions

• OpenSnitch version: (e.g. 1.8.0)
• OS: Rocky Linux
• OS version: 9.7 (Blue Onyx)
• Window Manager: (not required for this issue; optional)
• Kernel version: uname -a

Additional firewall environment:

• firewalld service: (active/inactive) — output below
• iptables status:
  • iptables --version (if applicable)
  • whether your system uses nft backend for iptables (if applicable)
• nftables status: (active/inactive)

Evidence observed (nftables)

OpenSnitch created nftables rules similar to:

table inet opensnitch {  
  ...  
  chain mangle_output {  
    type filter hook output priority mangle; policy accept;  
    ...  
    meta l4proto != tcp ct state related,new queue flags bypass to 0  
    tcp flags syn / fin,syn,rst,ack queue flags bypass to 0  
  }  
  ...  
}