Recovery actions can be done / press dev / dev / net / deny opening permission

Here are some simple methods that can help solve the tun / tap dev / dev / net / tun authorization issue.

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Hello I am getting the following basic error when I try to run openvpn on my Ubuntu server

  Fri Jan 8 02:12:59 2010 OpenVPN 2.1_rc11 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] was created on March 9, 2009.Fri 11 02:12:59 2010 ATTENTION! The --keepalive parameter is lost in Jan server config.fr six 02:12:59 2010 NOTE. The --script-security option can enable this configuration to reach custom scripts. Janfr Sep 02:12:59 2010 Diffie-Hellman initialized with key 1024 tad JanFri 8 02:12:59 2010 WARNING: the file '/etc/openvpn/easy-rsa/2.0/keys/server.key' is available for groups or maybe even othersTo save money, 8 is displayed 02:12:59 2010 / usr / bin / openssl-vulnkey -q -g 1024 -m Fri Jan 8, 02:12:59 2010 TLS-Auth MTU Settings [L: 1543 D: 140 EF: 40 EB: 0 ET: 0 EL: 0]Fri Jan 8 02:12:59 2010 ROUTE default_gateway = 192.0.2.1Fri Jan 8 02:12:59 2010 Note: Unable to open TUN / TAP dev / dev / net / tun: Authorization denied(Error = 13)Fri 8 Jan 02:12:59 Note: give it a trythose go back to the kernel 2.2 TUN / TAP interface.Fri Jan 8 02:12:59 2010 TUN / TAP Developer cannot be dynamically assignedFri 12 Jan 02:12:59 2010 Released

  the developer doestcp protocolPort 1194ca /etc/openvpn/easy-rsa/2.0/keys/ca.crtcertificate /etc/openvpn/easy-rsa/2.0/keys/server.crtKey /etc/openvpn/easy-rsa/2.0/keys/server.keythose. /etc/openvpn/easy-rsa/2.0/keys/dh1024.pemUser faceGroup without groupServer 10.8.0.0 255.255.255.0The key of persistencepersist in#status openvpn-status.log# Verb 3Client to clientclick "redirect-gateway def1"magazine tie

I am / var / log / openvpncomp-lzo runs from my root account. So I don’t know why permission was actually denied. Also, when I type modprobe for the last time, I get the following output.

  WARNING: config file /etc/modprobe.conf is out of date, all config files are included in / etc / modprobe into.d /.FATAL: /lib/modules/2.6.18-128.2.1.el5.028stab064.7ent/modules.dep could not be loaded: no such file or directory

I wish I had noticed this earlier, because this has happened to me a lot.

You are using a VPS on OpenVZ. Therefore, kernel modules do not seem to work for sure. You will need your company to activate it for you.

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As a result, most of these FUSEs will not work unless the vendor also allows it, and things like paging might not work at all.

answered Jul 13 10 at 1:05 am

The tun / tap component will not load because your kernel is not installed correctly. So while you probably have permission to use the device node, the device is not responding at all from the kernel side. Fix modprobe errors (just run the main depmod -a as you can) and continue what happens next.

answered Jan 8 ’15 at 11:20