OPNsense Forum

English Forums => 26.7, 26.10 Series => Topic started by: XxTriviumxX on November 15, 2026, 08:54:58 PM

Title: what causes this? [zone: pf frag entries] PF frag entries limit reached
Post by: XxTriviumxX on November 15, 2026, 08:54:58 PM
mEver since i got my n150 opnsense router, i see this message multiple times a week when i plug it to a monitor:


[zone: pf frag entries] PF frag entries limit reached


I raised Firewall Maximum Fragments 3-4 times. Every time i bump it up, it would stop showing any messages (on screen) for 1-2 weeks. After a while i have to bump it up again since it comes back. It is now set at 15000. Should i go higher? What is going on with my router? Any tips?

For further info: i use intel nics, and the mini pc has 16gb ram. Im on the latest version 26.7.9_1.  I bypassed my IPS router with a XGSPON OLT stick with a fan and i convert the fiber to ethernet with a switch. I use crowdsec's default protection with no IPS/IDS. I also use qfeeds. Let me know if you need more info on my case!
Title: Re: what causes this? [zone: pf frag entries] PF frag entries limit reached
Post by: nero355 on November 15, 2026, 09:49:13 PM
Quote from: XxTriviumxX on <strong>Today</strong> at 08:54:58 PMShould i go higher?
Restore it to the default value and have a look at your MTU settings for the connection or use MSS Clamping seems to be the way to fix it after a quick search on the internet :)

QuoteWhat is going on with my router? Any tips?
Have a look at this : https://forum.opnsense.org/index.php?topic=21207.0
And apply whatever could work for you and see if it helps...