Ping vs. SocketException

[schaf]

hi NG !
My app knows the IP address of a remote computer from App.exe.config.
What's the best way to check if this pc in on the network ?

Ping ?
or Dns.GetHostByAddress(sRemoteHostDefinition).HostNa me and catch the
exception ?

Thanks

[chanmm]

Yeap, if you know their IP, I bet ping is still a good way even it is a bit
of traditional.
http://msdn2.microsoft.com/en-us/lib...ng(d=ide).aspx

chanmm

"schaf" <sc***@2wire.ch> wrote in message
news:11********************@x69g2000cwx.googlegrou ps.com...

hi NG !
My app knows the IP address of a remote computer from App.exe.config.
What's the best way to check if this pc in on the network ?

Ping ?
or Dns.GetHostByAddress(sRemoteHostDefinition).HostNa me and catch the
exception ?

Thanks

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

Hi,

A ping is a good solution to know if that IP is in the network.

A better solution would be if you have some way to know if the remote
machine is running the program or service you want.
--
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"schaf" <sc***@2wire.ch> wrote in message
news:11********************@x69g2000cwx.googlegrou ps.com...

hi NG !
My app knows the IP address of a remote computer from App.exe.config.
What's the best way to check if this pc in on the network ?

Ping ?
or Dns.GetHostByAddress(sRemoteHostDefinition).HostNa me and catch the
exception ?

Thanks

[Markus Stoeger]

schaf wrote:

hi NG !
My app knows the IP address of a remote computer from App.exe.config.
What's the best way to check if this pc in on the network ?

Ping ?
or Dns.GetHostByAddress(sRemoteHostDefinition).HostNa me and catch the
exception ?

Doesn't the WinXP firewall block pings (icmp echo requests) by default?
If you have control over the remote PC and can disable that setting, I'd
go for ping too.

Max