Bufferbloat guide causes NAT bug

fused

https://docs.netgate.com/pfsense/en/latest/recipes/codel-limiters.html

I used this guide to reduce bufferbloat and it works just fine. However, I noticed that when I perform a traceroute on any of my clients, I will see the destination IP address on every single hop. As soon as I disable the Traffic Limiter queues, traceroute works properly and shows the correct IP address on every hop.

Example:

Anyone else run into this problem? I'm running 22.01-RELEASE on a Netgate 3100.

Bob.Dig

@fused said in Bufferbloat guide causes NAT bug:

Anyone else run into this problem?

No. Next time show your command too.

fused

@bob-dig all I typed was tracert 1.1.1.1 in command prompt but I get your point. This happens on all client types: smartphones, linux, windows, etc.

Here are the results from the router itself:

SOURCE: LAN INTERFACE
CODEL LIMITERS: ENABLED

SOURCE: LAN INTERFACE
CODEL LIMITERS: DISABLED

SOURCE: WAN INTERFACE
CODEL LIMITERS: ENABLED

Bob.Dig

@fused Next is to show your actual rule you made.

tman222

Hi @fused -

This is actually a known issue that has been worked on:

https://redmine.pfsense.org/issues/9263
https://docs.netgate.com/pfsense/en/latest/releases/22-05.html#traffic-shaper-limiters

It should be working better in pfSense 22.05 once it's released. I recently upgraded one my 22.01 systems to the 22.05 Beta version (22.05-RC) and can confirm that the traceroutes do work properly for me now.

Hope this helps.

fused

@tman222 awesome! thanks for the information :)