Loading kernel module for a network device with CAP_SYS_MODULE (deprecated). Surprisingly, dmesg seems to show nothing special about it: tun: Universal TUN/TAP device driver, 1.6

Ioctl(TUNSETIFF): Device or resource busy It brings itself up again just after few seconds!Įven worse, when I try to delete that tunnel: $ sudo ip tuntap del dev tun mode tun TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 RX packets:6 errors:0 dropped:0 overruns:0 frame:0 TX packets:2730 errors:0 dropped:0 overruns:0 carrier:0 RX packets:3250 errors:0 dropped:0 overruns:0 frame:0 POINTOPOINT NOARP MULTICAST MTU:1280 Metric:1

In an attempt to disable it, I ran sudo ifconfig tun down, and this came up: $ sudo ifconfig tun down Through the tun interface enables me to access the IPv6 network via a tunnel, it slows me down so much because of the system's behavior prioritizing IPv6 network over IPv4 and trying to connect to web servers via that tunnel. TX packets:909338 errors:0 dropped:0 overruns:0 carrier:0 RX packets:1586404 errors:0 dropped:0 overruns:0 frame:0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Wlan0 Link encap:Ethernet HWaddr c8:f7:33:ac:34:56 Virbr0 Link encap:Ethernet HWaddr f2:49:d0:5b:ef:80 TX packets:2301 errors:0 dropped:0 overruns:0 carrier:0 RX packets:2772 errors:0 dropped:0 overruns:0 frame:0 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1280 Metric:1 TX packets:38993 errors:0 dropped:0 overruns:0 carrier:0 RX packets:38993 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 Here's the output when I run ifconfig: eth0 Link encap:Ethernet HWaddr 50:b7:c3:92:38:e2 I can neither bring down nor delete this tun interface which is added on startup.

How to install tunctl debian linux