[dbus]How to verify the capability of dbus IPC between machines

Pavel Strashkin pavel.strashkin at gmail.com
Tue Nov 29 11:34:26 PST 2011

Does dbus-monitor successfully connect to dbus-daemon on specified host & port?

2011/11/28 yinxb <yinxiaobiao at gmail.com>:
> In addition,dbus-monitor in the remote PC cannot find any info related
> the dbus-send.
> 在 2011年11月29日 上午10:38,yinxb <yinxiaobiao at gmail.com> 写道:
>> Hi  Thiago Macieira and Pavel
>>     Thanks for your reply.
>>     As metioned in your mail,I did the following steps:
>> 1.Romote PC:
>>   Config /etc/dbus-1/system.conf.
>>   Add listen tcp:host=,port=12434
>> 2.Local PC:
>>   dbus-send --address=tcp:host=xx.xxx.xx.116,port=12434 --print-reply
>>  --dest=org.gnome.PowerManager
>> /org/ayatana/NotificationItem/gnome_power_manager/Menu
>> org.freedesktop.Dbus.Introspectable.Introspect
>> after that,I got the following message:
>> Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply.
>> Possible causes include: the remote application did not send a reply,
>> the message bus security policy blocked the reply, the reply timeout
>> expired, or the network connection was broken.
>> Can you figure out what is missing or wrong with my steps?
>> ps:
>> telnet can connect the remote PC (xx.xxx.xx.116).
>> 2011/11/29 Thiago Macieira <thiago at kde.org>:
>>> On Monday, 28 de November de 2011 15.59.42, 尹YinXiaobiao wrote:
>>>> Hi all
>>>>      I am a newbie at Dbus and this is my first mail in this maillist.
>>>>     By some investigate and look at the source code,I know that dbus
>>>> is using socket(tcp & unix domain socket) to transfer data.
>>>>     So it is possible for communication between two machines(or VM).
>>> Right, it's possible.
>>>>     Now my question is how to vevify this capability by dbus-send command.
>>>>     Can anyone give me  a hint?
>>> Just send the message you want to send. You know the address of the bus server
>>> to connect to, so pass it in the --address= option. You know that address
>>> because you configured the other machine with it.
>>>> Someone tell me that dbus do not listen on TCP by default,how to
>>>> enable TCP listen?
>>> Create your own config file and change the <listen> directive to be on TCP.
>>> Remember: D-Bus TCP is unauthenticated an unencrypted. It accepts connections
>>> from anywhere and trusts it blindly.
>>> --
>>> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
>>>   Software Architect - Intel Open Source Technology Center
>>>      PGP/GPG: 0x6EF45358; fingerprint:
>>>      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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