vista server not accepting connetions

[Bob]

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

[Ignacio Machin \( .NET/ C# MVP \)]

Hi

Under what user your vista code runs?
I think it's a Vista related problem, so you are going to be better anwered
in a Vista's NG

"Bob" <bs********@yah oo.comwrote in message
news:11******** **************@ y5g2000hsa.goog legroups.com...

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

[Bob]

On May 1, 12:44 pm, "Ignacio Machin \( .NET/ C# MVP \)" <machin TA
laceupsolutions .comwrote:

Hi

Under what user your vista code runs?
I think it's a Vista related problem, so you are going to be better anwered
in a Vista's NG

"Bob" <bshumsk...@yah oo.comwrote in message

news:11******** **************@ y5g2000hsa.goog legroups.com...

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

Good point. I have tried both an administrator user and a standard
user.

[Bob]

On May 1, 6:34 pm, Bob <bshumsk...@yah oo.comwrote:

On May 1, 12:44 pm, "Ignacio Machin \( .NET/ C# MVP \)" <machin TA

laceupsolutions .comwrote:

Hi

Under what user your vista code runs?
I think it's a Vista related problem, so you are going to be better anwered
in a Vista's NG

"Bob" <bshumsk...@yah oo.comwrote in message

news:11******** **************@ y5g2000hsa.goog legroups.com...

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

Good point. I have tried both an administrator user and a standard
user.

I think I figured out the problem. I think has to do with Vista
implementing ipv6 addresses. I was using the following code:

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

however, the localMachineInf o.AddressList on my vista computer had a
length of 3 compared to 1 on my XP machines. The address that I was
trying to connect to (the old ipv4 version like 192.168.1.1) is the
last entry on vista. Accordingly, when I modify the code to:

IPEndPoint myEndpoint = new IPEndPoint(

localMachineInf o.AddressList[localMachineInf o.AddressList.L ength-1],
_port);

it seems to work.

Thanks,
Bob

[Willy Denoyette [MVP]]

"Bob" <bs********@yah oo.comwrote in message
news:11******** **************@ h2g2000hsg.goog legroups.com...

On May 1, 6:34 pm, Bob <bshumsk...@yah oo.comwrote:

>On May 1, 12:44 pm, "Ignacio Machin \( .NET/ C# MVP \)" <machin TA

laceupsolution s.comwrote:

Hi

Under what user your vista code runs?
I think it's a Vista related problem, so you are going to be better
anwered
in a Vista's NG

"Bob" <bshumsk...@yah oo.comwrote in message

>news:11******* *************** @y5g2000hsa.goo glegroups.com.. .

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

Good point. I have tried both an administrator user and a standard
user.

I think I figured out the problem. I think has to do with Vista
implementing ipv6 addresses. I was using the following code:

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

however, the localMachineInf o.AddressList on my vista computer had a
length of 3 compared to 1 on my XP machines. The address that I was
trying to connect to (the old ipv4 version like 192.168.1.1) is the
last entry on vista. Accordingly, when I modify the code to:

IPEndPoint myEndpoint = new IPEndPoint(

localMachineInf o.AddressList[localMachineInf o.AddressList.L ength-1],
_port);

it seems to work.

Thanks,
Bob

There is no guranatee that the IPV4 entry is at a fixed position in the
list, so this is bound to fail. You have to enumerate the list and check the
address family you want your endpoint to bind to.
Something like this will do:

IPHostEntry localMachineInf o Dns.GetHostEntr y(Dns.GetHostNa me());
foreach (IPAddress ip in localMachineInf o .AddressList)
{
if((int)ip.Addr essFamily == (int)ProtocolFa mily.InterNetwo rk)
{
IPEndPoint myEndpoint = new IPEndPoint(ip, _port);
.....
Willy.

[Bob]

Awesome, thanks!
Willy Denoyette [MVP] wrote:

"Bob" <bs********@yah oo.comwrote in message
news:11******** **************@ h2g2000hsg.goog legroups.com...

On May 1, 6:34 pm, Bob <bshumsk...@yah oo.comwrote:

On May 1, 12:44 pm, "Ignacio Machin \( .NET/ C# MVP \)" <machin TA

laceupsolutions .comwrote:
Hi

Under what user your vista code runs?
I think it's a Vista related problem, so you are going to be better
anwered
in a Vista's NG

"Bob" <bshumsk...@yah oo.comwrote in message

news:11******** **************@ y5g2000hsa.goog legroups.com...

Hi,
I have some code that sets up an asynchronous server. It is working
fine on my XP machines but I can't get it to work on Vista.
Actually, it "works: in that it runs but when I try to connect via
telnet I get nothing. I have tried opening up the port and also
turned off the firewall. Neither seems to work and it won't accept
conections. Does anyone know of anything else I should do?

Thanks,,
Bob

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

// Create the socket, bind it, and start listening
_serverSocket = new
Socket(myEndpoi nt.Address.Addr essFamily,
SocketType.Stre am, ProtocolType.Tc p);
_serverSocket.B ind(myEndpoint) ;

_serverSocket.L isten((int)Sock etOptionName.Ma xConnections);

Good point. I have tried both an administrator user and a standard
user.

I think I figured out the problem. I think has to do with Vista
implementing ipv6 addresses. I was using the following code:

IPHostEntry localMachineInf o =
Dns.GetHostEntr y(Dns.GetHostNa me());
IPEndPoint myEndpoint = new IPEndPoint(
localMachineInf o.AddressList[0], _port);

however, the localMachineInf o.AddressList on my vista computer had a
length of 3 compared to 1 on my XP machines. The address that I was
trying to connect to (the old ipv4 version like 192.168.1.1) is the
last entry on vista. Accordingly, when I modify the code to:

IPEndPoint myEndpoint = new IPEndPoint(

localMachineInf o.AddressList[localMachineInf o.AddressList.L ength-1],
_port);

it seems to work.

Thanks,
Bob

There is no guranatee that the IPV4 entry is at a fixed position in the
list, so this is bound to fail. You have to enumerate the list and check the
address family you want your endpoint to bind to.
Something like this will do:

IPHostEntry localMachineInf o Dns.GetHostEntr y(Dns.GetHostNa me());
foreach (IPAddress ip in localMachineInf o .AddressList)
{
if((int)ip.Addr essFamily == (int)ProtocolFa mily.InterNetwo rk)
{
IPEndPoint myEndpoint = new IPEndPoint(ip, _port);
.....
Willy.