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Date:      Wed, 14 Jan 2026 19:31:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 292464] if_ovpn has inconsistent counter display
Message-ID:  <bug-292464-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292464

            Bug ID: 292464
           Summary: if_ovpn has inconsistent counter display
           Product: Base System
           Version: 14.3-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: mike@sentex.net

I noticed when I upgraded from RELENG_13 to RELENG_14 and if_ovpn was being
loaded, I was getting zero traffic via my telegraf collector. If I disable DCO,
I get counters properly being recorded by telegraf. Looking at the output of
netstat , having if_ovpn loaded or not does seem to update things differently. 
e.g. 

Here is netstat with if_ovpn active 

 netstat -I tun416 -n -b 

Name     Mtu Network          Address         Ipkts Ierrs Idrop     Ibytes   
Opkts Oerrs     Obytes  Coll
tun416  1500 <Link#6>         tun416              0     0     0          0     
  0     0          0     0
tun416     - 172.24.4.254/32  172.24.4.254       30     -     -       2122     
 35     -       2387     -

and here it is without it loaded 

Name     Mtu Network          Address         Ipkts Ierrs Idrop     Ibytes   
Opkts Oerrs     Obytes  Coll
tun416  1500 <Link#6>         tun416             18     0     0       1568     
 21     0       1541     0
tun416     - 172.24.4.254/32  172.24.4.254       16     -     -       1138     
 19     -       1307     -

The Link line is never updated, which is where I am guessing telegraf is
looking for data. 

OpenVPN is from the pkg latest
OpenVPN 2.6.16 amd64-portbld-freebsd14.3 
14.3-STABLE FreeBSD 14.3-STABLE stable/14-215d16e4102b GENERIC amd64

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