This file is indexed.

/etc/vtund.conf is in vtun 3.0.3-2.

This file is owned by root:root, with mode 0o600.

The actual contents of the file can be viewed below.

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#
# VTun - Virtual Tunnel over TCP/IP network.
# Copyright (C) 1998-2001  Maxim Krasnyansky <max_mk@yahoo.com>
#
# Cleanup of English and spelling by 
#   Ted Rolle <ted@acacia.datacomm.com>
#
# Configuration file example, please see /usr/share/doc/vtun/examples for
# other examples.
# 
# Lines which begin with '#' are comments
#
# File format:
#
# XXXXX {
#   option param; option param;
#   option param;
#   ......
# }  
# Where XXXXX:
#   options - General options.
#   default - default session options.
#   session - Session options.     
# 
# Options _must_ be grouped by curly braces '{' '}'.
# Each option _must_ end with ';' 
#
# -----------
# General options: 
#
#   type - Server type.
#	'stand' - Stand alone server (default).
#       'inetd' - Started by inetd.
#       Used only by the server.
#
# -----------
#   port - Server TCP port number.
#
# -----------
#   syslog - Syslog facility.
#
# -----------
#   timeout - General VTun timeout. 
#
# -----------
#   ppp  - Program for the ppp initialization.
#
# -----------
#   ifconfig - Program for the net interface initialization.
#
# -----------
#   route  - Program for the routing table manipulation. 
#
# -----------
#   firewall - Program for the firewall setup. 
#
# -----------
#  
# Session options: 
#
#    passwd - Password for authentication.
#
# -----------
#    type - Tunnel type.
#       'tun'   - IP tunnel (No PPP,Ether,.. headers).
#       'ether' - Ethernet tunnel.
#       'tty'   - Serial tunnel, PPP, SLIP, etc.
#       'pipe'  - Pipe tunnel.
#       Default type is 'tty'.
#       Ignored by the client.
#
# -----------
#    device - Network device.
#       'tapXX' - for 'ether'
#       'tunXX' - for 'tun'
#	By default VTun will automatically select available
#	device.
#
# -----------
#    proto - Protocol.
#       'tcp' - TCP protocol.
#       'udp' - UDP protocol.
#  
#       'tcp' is default for all tunnel types.
#	'udp' is recommended for 'ether' and 'tun' only. 
#	
#       This option is ignored by the client.
#
# -----------
#    persist - Persist mode. 
#       'yes' - Reconnect to the server after connection 
#	      termination. 
#	'no' - Exit after connection termination (default).
#       Used only by the client.
#
# -----------
#    keepalive - Enable 'yes' or disable 'no' connection
#	keep-alive. Ignored by the client.
#
# -----------
#    timeout - Connect timeout. 
#
# -----------
#    compress - Enable 'yes' or disable 'no' compression. 
#	It is also possible to specify method:
#	   'zlib' - ZLIB compression
#	   'lzo'  - LZO compression
#	and level: 
#	   from 1(best speed) to 9(best compression)
#	separated by ':'. Default method is 'zlib:1'.  
#       Ignored by the client. 
#
# -----------
#    encrypt - Enable 'yes' or disable 'no' encryption.
#       Ignored by the client.
#
# -----------
#    stat - Enable 'yes' or disable 'no' statistics.
#       If enabled vtund will log statistic counters every
#	5 minutes.
#
# -----------
#    speed -  Speed of the connection in kilobits/second.
#       8,16,32,64,128,256,etc.
#       0 means maximum possible speed without shaping.
#       You can specify speed in form IN:OUT.
#       IN - to the client, OUT - from the client.
#       Single number means same speed for IN and OUT.
#       Ignored by the client.
#
# -----------
#    up - List of programs to run after connection has been 
#	established. Used to initialize protocols, devices, 
#	routing and firewall.
#    Format:	  
#       up {
#         option .....;
#         option .....;
#       };
#
#    down - List of programs to run after connection has been 
#	terminated. Used to reset protocols, devices, routing 
#	and firewall.
#    Format:	  
#       down {
#         option .....;
#         option .....;
#       };
#
#    'up' and 'down' options:
#
#    program - Run specified program.
#    Format:
#       program path arguments wait;
#
#       path - Full path to the program. 
#	   '/bin/sh' will be used if path was omitted.
#
#       arguments - Arguments to pass to the program. 
#	   Must be enclosed in double quotes. 
#	   Special characters and expansions: 
#	      ' (single quotes) -  group arguments
#	      \ (back slash) - escape character 
#	      %%(double percent) - same as %d
#	      %d - TUN or TAP device or TTY port name 
#	      %A - Local IP address
#	      %P - Local TCP or UDP port  
#	      %a - Remote IP address
#	      %p - Remote TCP or UDP port
#
#       wait - Wait for the program termination. 
#
#    ppp - Run program specified by 'ppp' statement in 
#	   'options' section.
#    Format:
#       ppp arguments;
#
#    ifconfig - Run program specified by 'ifconfig' statement in 
#	   'options' section.
#    Format:
#       ifconfig arguments;
#
#    route - Run program specified by 'route' statement in 
#	   'options' section.
#    Format:
#       route arguments;
#
#    firewall - Run program specified by 'firewall' statement in 
#	   'options' section.
#    Format:
#       firewall arguments;
#
# -----------
#    srcaddr - Local (source) address. Used to force vtund to bind
# 	to the specific address and port.
#    Format:	  
#       srcaddr {
#         option .....;
#         option .....;
#       };
#
#    'srcaddr' options:
#
#    iface - Use interface address as the Source address.
#    Format:
#       iface if_name;
#
#    addr - Source address.
#    Format:
#       addr ip_address;
#       addr host_name;
#
#    port - Source port.
#    Format:
#       port port_no;
#
# -----------
#    multi - Multiple connections.
#	'yes' or 'allow' - allow multiple connections.
#	'no' or 'deny' - deny multiple connections.
#	'killold' - allow new connection and kill old one.
#       Ignored by the client.
#
# -----------
# Notes:
#   Options 'Ignored by the client' are provided by server 
#   at the connection initialization. 
#
#   Option names can be abbreviated to a minimum of 4 characters.
#