On 11/21/25 1:20 AM, Simon Matter via Shorewall-users wrote:
Hi,
On 9/25/25 3:14 PM, Simon Matter via Shorewall-users wrote:
Hi,
I'm trying to migrate an old firewall to AlmaLinux 10 (RHEL10
compatible).
I'm having problems with the traffic shaping like this:
Setting up Traffic Control...
Error: TC classifier not found.
We have an error talking to the kernel
ERROR: Command "tc filter add dev enp4s0 parent ffff: protocol all
prio
10 estimator 250ms 4sec basic police avrate 500000kbit drop" Failed
Shorewall can only work with Iptables and almalinux 10 is only Nftables
based.
Do you have the TC utility installed?
AlmaLinux 10 (like RHEL 10) have iptables as well and the filtering works
well. Only the traffic shaping doesn't work. The TC utility is installed.
Regards,
Simon
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I haven't messed with traffic shaping for years, but I remember having
to make sure all the tc stuff was configured in my kernel. IIRC, it's
not included by default. There should be instructions in the Shorewall
docs regarding required kernel modules/features to enable traffic
shapping successfully.
Regards,
Kevin
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