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-rw-r--r--Documentation/networking/tuntap.txt11
1 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/networking/tuntap.txt b/Documentation/networking/tuntap.txt
index 76750fb9151a..839cbb71388b 100644
--- a/Documentation/networking/tuntap.txt
+++ b/Documentation/networking/tuntap.txt
@@ -39,10 +39,13 @@ Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
39 mknod /dev/net/tun c 10 200 39 mknod /dev/net/tun c 10 200
40 40
41 Set permissions: 41 Set permissions:
42 e.g. chmod 0700 /dev/net/tun 42 e.g. chmod 0666 /dev/net/tun
43 if you want the device only accessible by root. Giving regular users the 43 There's no harm in allowing the device to be accessible by non-root users,
44 right to assign network devices is NOT a good idea. Users could assign 44 since CAP_NET_ADMIN is required for creating network devices or for
45 bogus network interfaces to trick firewalls or administrators. 45 connecting to network devices which aren't owned by the user in question.
46 If you want to create persistent devices and give ownership of them to
47 unprivileged users, then you need the /dev/net/tun device to be usable by
48 those users.
46 49
47 Driver module autoloading 50 Driver module autoloading
48 51