iptunnel -V (return code: 5)
net-tools 1.60
iptunnel 1.01
Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
iptunnel --help (return code: 255)
Usage: iptunnel { add | change | del | show } [ NAME ]
[ mode { ipip | gre | sit } ] [ remote ADDR ] [ local ADDR ]
[ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]
[ ttl TTL ] [ tos TOS ] [ nopmtudisc ] [ dev PHYS_DEV ]
iptunnel -V | --version
Where: NAME := STRING
ADDR := { IP_ADDRESS | any }
TOS := { NUMBER | inherit }
TTL := { 1..255 | inherit }
KEY := { DOTTED_QUAD | NUMBER }