RPC Server is unavailable by computers under xp

[Stropher]

I have the following code and if I enter the name of a computer running
under windows xp I get an exception that rpc server is not available
although the services are running

void userGroups(stri ng computerName)

string compName = computerName;
if (!compName.Star tsWith(@"\\"))
{
compName = @"\\" + compName + @"\root\cimv 2";
}
ConnectionOptio ns options = new ConnectionOptio ns();

options.Usernam e = this.userName;
options.Passwor d = this.password;

ManagementScope mScope = new ManagementScope (compName, options);
string domain = "";
try
{
ManagementObjec tSearcher searcher = new
ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT * FROM
Win32_Group where Domain
= '" + computerName + "'"));
ManagementObjec tSearcher searcher2 = new
ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT Name FROM
Win32_UserAccou nt where
Domain = '" + computerName + "'"));

ManagementObjec tCollection moc = searcher.Get(); //***
//by *** jump into the exception
ManagementObjec tCollection moc2 = searcher2.Get() ;

ManagementBaseO bject[] names = new ManagementBaseO bject
[moc2.Count];
ManagementBaseO bject[] groups = new ManagementBaseO bject
[moc.Count];
moc2.CopyTo(nam es, 0);
moc.CopyTo(grou ps, 0);

domain = groups[0]["Domain"].ToString();

for (int i = 0; i < groups.Length; i++)
{
if (i < names.Length)
{
string name = names[i]["Name"].ToString();
this.listBoxBen utzername.Items .Add(name);
}

this.listBoxRec hner.Items.Add( domain);
string group = groups[i]["Name"].ToString();
this.listBoxGru ppe.Items.Add(g roup);

}
}
}
catch (Exception ex)
{
throw new Exception("Erro r obtaining group names. " +
ex.Message);
}
}

---------------------------------------------
An this point, see //***
I get the exception: "RPC Server is unavailable from HRESULT:
0x800706BA"

Is there anything I am missing?
Thanks in advance

[Willy Denoyette [MVP]]

By default, XP and higer OS do not enable "external" access of WMI services.
You'll have to set each PC's WMI security according your requirements.

Willy.

"Stropher" <hm***@gmx.netw rote in message
news:11******** ************@v6 1g2000cwv.googl egroups.com...
|I have the following code and if I enter the name of a computer running
| under windows xp I get an exception that rpc server is not available
| although the services are running
|
| void userGroups(stri ng computerName)
|
| string compName = computerName;
| if (!compName.Star tsWith(@"\\"))
| {
| compName = @"\\" + compName + @"\root\cimv 2";
| }
| ConnectionOptio ns options = new ConnectionOptio ns();
|
| options.Usernam e = this.userName;
| options.Passwor d = this.password;
|
| ManagementScope mScope = new ManagementScope (compName, options);
| string domain = "";
| try
| {
| ManagementObjec tSearcher searcher = new
| ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT * FROM
| Win32_Group where Domain
| = '" + computerName + "'"));
| ManagementObjec tSearcher searcher2 = new
| ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT Name FROM
| Win32_UserAccou nt where
| Domain = '" + computerName + "'"));
|
| ManagementObjec tCollection moc = searcher.Get(); //***
| //by *** jump into the exception
| ManagementObjec tCollection moc2 = searcher2.Get() ;
|
| ManagementBaseO bject[] names = new ManagementBaseO bject
| [moc2.Count];
| ManagementBaseO bject[] groups = new ManagementBaseO bject
| [moc.Count];
| moc2.CopyTo(nam es, 0);
| moc.CopyTo(grou ps, 0);
|
| domain = groups[0]["Domain"].ToString();
|
| for (int i = 0; i < groups.Length; i++)
| {
| if (i < names.Length)
| {
| string name = names[i]["Name"].ToString();
| this.listBoxBen utzername.Items .Add(name);
| }
|
| this.listBoxRec hner.Items.Add( domain);
| string group = groups[i]["Name"].ToString();
| this.listBoxGru ppe.Items.Add(g roup);
|
| }
| }
| }
| catch (Exception ex)
| {
| throw new Exception("Erro r obtaining group names. " +
| ex.Message);
| }
| }
|
| ---------------------------------------------
| An this point, see //***
| I get the exception: "RPC Server is unavailable from HRESULT:
| 0x800706BA"
|
| Is there anything I am missing?
| Thanks in advance
|

[Jeff Shepler]

Make sure the firewall isn't blocking it.

Also, you need to set an additional option. Since sp1, it has been
required to use PacketPrivacy when authenticating against remote
machines. You just need to set an additional ConnectionOptio n. In you
code, add:

options.Authent ication = AuthenticationL evel.PacketPriv acy;
You should also be aware of the behavior that RPC uses dynamic port
allocation. I don't know if this is the case for XP boxes, but if you
ever want to do what you're doing to a server, you will probably need
to know this:

http://support.microsoft.com/kb/154596/EN-US/


On 4 Jul 2006 02:46:57 -0700, "Stropher" <hm***@gmx.netw rote:

>I have the following code and if I enter the name of a computer running
under windows xp I get an exception that rpc server is not available
although the services are running

void userGroups(stri ng computerName)

string compName = computerName;
if (!compName.Star tsWith(@"\\"))
{
compName = @"\\" + compName + @"\root\cimv 2";
}
ConnectionOptio ns options = new ConnectionOptio ns();

options.Usernam e = this.userName;
options.Passwor d = this.password;

ManagementScope mScope = new ManagementScope (compName, options);
string domain = "";
try
{
ManagementObjec tSearcher searcher = new
ManagementObje ctSearcher(mSco pe,new ObjectQuery("SE LECT * FROM
Win32_Group where Domain
= '" + computerName + "'"));
ManagementObjec tSearcher searcher2 = new
ManagementObje ctSearcher(mSco pe,new ObjectQuery("SE LECT Name FROM
Win32_UserAcco unt where
Domain = '" + computerName + "'"));

ManagementObjec tCollection moc = searcher.Get(); //***
//by *** jump into the exception
ManagementObjec tCollection moc2 = searcher2.Get() ;

ManagementBaseO bject[] names = new ManagementBaseO bject
[moc2.Count];
ManagementBaseO bject[] groups = new ManagementBaseO bject
[moc.Count];
moc2.CopyTo(nam es, 0);
moc.CopyTo(grou ps, 0);

domain = groups[0]["Domain"].ToString();

for (int i = 0; i < groups.Length; i++)
{
if (i < names.Length)
{
string name = names[i]["Name"].ToString();
this.listBoxBen utzername.Items .Add(name);
}

this.listBoxRec hner.Items.Add( domain);
string group = groups[i]["Name"].ToString();
this.listBoxGru ppe.Items.Add(g roup);

}
}
}
catch (Exception ex)
{
throw new Exception("Erro r obtaining group names. " +
ex.Message);
}
}

---------------------------------------------
An this point, see //***
I get the exception: "RPC Server is unavailable from HRESULT:
0x800706BA"

Is there anything I am missing?
Thanks in advance

[Stropher]

Thanks very much for your quick answer..

Willy Denoyette [MVP] wrote:

By default, XP and higer OS do not enable "external" access of WMI services.
You'll have to set each PC's WMI security according your requirements.

Willy.

"Stropher" <hm***@gmx.netw rote in message
news:11******** ************@v6 1g2000cwv.googl egroups.com...
|I have the following code and if I enter the name of a computer running
| under windows xp I get an exception that rpc server is not available
| although the services are running
|
| void userGroups(stri ng computerName)
|
| string compName = computerName;
| if (!compName.Star tsWith(@"\\"))
| {
| compName = @"\\" + compName + @"\root\cimv 2";
| }
| ConnectionOptio ns options = new ConnectionOptio ns();
|
| options.Usernam e = this.userName;
| options.Passwor d = this.password;
|
| ManagementScope mScope = new ManagementScope (compName, options);
| string domain = "";
| try
| {
| ManagementObjec tSearcher searcher = new
| ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT * FROM
| Win32_Group where Domain
| = '" + computerName + "'"));
| ManagementObjec tSearcher searcher2 = new
| ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT Name FROM
| Win32_UserAccou nt where
| Domain = '" + computerName + "'"));
|
| ManagementObjec tCollection moc = searcher.Get(); //***
| //by *** jump into the exception
| ManagementObjec tCollection moc2 = searcher2.Get() ;
|
| ManagementBaseO bject[] names = new ManagementBaseO bject
| [moc2.Count];
| ManagementBaseO bject[] groups = new ManagementBaseO bject
| [moc.Count];
| moc2.CopyTo(nam es, 0);
| moc.CopyTo(grou ps, 0);
|
| domain = groups[0]["Domain"].ToString();
|
| for (int i = 0; i < groups.Length; i++)
| {
| if (i < names.Length)
| {
| string name = names[i]["Name"].ToString();
| this.listBoxBen utzername.Items .Add(name);
| }
|
| this.listBoxRec hner.Items.Add( domain);
| string group = groups[i]["Name"].ToString();
| this.listBoxGru ppe.Items.Add(g roup);
|
| }
| }
| }
| catch (Exception ex)
| {
| throw new Exception("Erro r obtaining group names. " +
| ex.Message);
| }
| }
|
| ---------------------------------------------
| An this point, see //***
| I get the exception: "RPC Server is unavailable from HRESULT:
| 0x800706BA"
|
| Is there anything I am missing?
| Thanks in advance
|

[Stropher]

Thanks Jeff for your reply...

Jeff Shepler wrote:

Make sure the firewall isn't blocking it.

Also, you need to set an additional option. Since sp1, it has been
required to use PacketPrivacy when authenticating against remote
machines. You just need to set an additional ConnectionOptio n. In you
code, add:

options.Authent ication = AuthenticationL evel.PacketPriv acy;
You should also be aware of the behavior that RPC uses dynamic port
allocation. I don't know if this is the case for XP boxes, but if you
ever want to do what you're doing to a server, you will probably need
to know this:

http://support.microsoft.com/kb/154596/EN-US/


On 4 Jul 2006 02:46:57 -0700, "Stropher" <hm***@gmx.netw rote:

I have the following code and if I enter the name of a computer running
under windows xp I get an exception that rpc server is not available
although the services are running

void userGroups(stri ng computerName)

string compName = computerName;
if (!compName.Star tsWith(@"\\"))
{
compName = @"\\" + compName + @"\root\cimv 2";
}
ConnectionOptio ns options = new ConnectionOptio ns();

options.Usernam e = this.userName;
options.Passwor d = this.password;

ManagementScope mScope = new ManagementScope (compName, options);
string domain = "";
try
{
ManagementObjec tSearcher searcher = new
ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT * FROM
Win32_Group where Domain
= '" + computerName + "'"));
ManagementObjec tSearcher searcher2 = new
ManagementObjec tSearcher(mScop e,new ObjectQuery("SE LECT Name FROM
Win32_UserAccou nt where
Domain = '" + computerName + "'"));

ManagementObjec tCollection moc = searcher.Get(); //***
//by *** jump into the exception
ManagementObjec tCollection moc2 = searcher2.Get() ;

ManagementBaseO bject[] names = new ManagementBaseO bject
[moc2.Count];
ManagementBaseO bject[] groups = new ManagementBaseO bject
[moc.Count];
moc2.CopyTo(nam es, 0);
moc.CopyTo(grou ps, 0);

domain = groups[0]["Domain"].ToString();

for (int i = 0; i < groups.Length; i++)
{
if (i < names.Length)
{
string name = names[i]["Name"].ToString();
this.listBoxBen utzername.Items .Add(name);
}

this.listBoxRec hner.Items.Add( domain);
string group = groups[i]["Name"].ToString();
this.listBoxGru ppe.Items.Add(g roup);

}
}
}
catch (Exception ex)
{
throw new Exception("Erro r obtaining group names. " +
ex.Message);
}
}

---------------------------------------------
An this point, see //***
I get the exception: "RPC Server is unavailable from HRESULT:
0x800706BA"

Is there anything I am missing?
Thanks in advance