DTCP Client -- dtcpclient

Testing Connection

It is a good idea to test if you can connect to a server by executing dtcpclient from command line. With -d option, you can see more debug informations.

The comman line is like follows:

dtcpclient -t network -u hoge -d dtcp.example.org
Server: dtcp.example.org
User: hoge (-u)
Network tunnel type (-t)
Debug output (-d)
When you excute dtcpclient, you are asked your password. Answer it.

When connection is established, a tunnel should be established and an IPv6 default route should be set up toward a tunnel. The following is an example outout under FreeBSD: 

ume@cheer:1003% ifconfig gif0
gif0: flags=8051 mtu 1280
        tunnel inet 218.45.20.185 --> 210.161.150.9
        inet6 fe80::240:c7ff:fe99:81eb%gif0 prefixlen 64 scopeid 0x4
ume@cheer:1004% netstat -rnfinet6 | grep gif0
default                           ::1                           UGSc       gif0
fe80::%gif0/64                    link#4                        UC         gif0
fe80::240:c7ff:fe99:81eb%gif0     link#4                        UHL         lo0
ff02::%gif0/32                    link#4                        UC         gif0
A tunnel and routes are configured by /usr/local/etc/dtcpclient.script. You can configure this behavior by editing /usr/local/etc/dtcpclient_script.conf. Since dtcpclient_script.conf is not installed by default, please create it if necessary. Please refer the comment in dtcpclient.script for configuration items.

You can use your favorite tunnel interface by setting `tunif' variable in dtcpclient_script.conf.
The valude is `gif' under FreeBSD by default. That is, a gif interface will be created on demand to be used.
The setting of `tunif' is ignored under MacOSX. The dtcpclient_script searches a gif interface which is ready to use then use it, instead.
The default is `gif0' under other OSs than above.

If you don't want the behavior that an IPv6 default route is set up automatically, specify appropriate routes by static_routes in dtcpclient_script.

The dtcpclient doesn't set sysctl automatically, like the dtcpc does. To configure your box as a router, please set following mibs separately:

net.inet6.ip6.forwarding=1
net.inet6.ip6.accept_rtadv=0
For example, you can put following two lines into /etc/rc.conf under FreeBSD:
ipv6_enable="YES"
ipv6_gateway_enable="YES"
Or, please put following line into /etc/rc.conf under NetBSD:
ip6mode="router"

The dtcpclient doesn't set an IPv6 global address up automatically with above settings. If you know a prefix delegated from a server. you can set it up statically. Or, please refer Configuring Prefix Delegetion.

All Rights Reserved, Copyright (C) 2004-2005 Hajimu UMEMOTO
Last Modified Jan 23, 2005
ume@mahoroba.org