[DUG] Detecting if a server is present.

[Phil Scadden]

I have a program that connects to a remote server with an Indy 
idTCPClient component on a specified port.
What I am trying to do is improve diagnostics for when the server doesnt 
respond. Ie there are two possible
reasons for failure.
1/ The server is unreachable or blocked
2/ The listening program on the server is down.

When a failure occurs, I thought I would try pinging the server to see 
if present from in the code. No go.
Ping returns an access denied  - though using the ping command on the XP 
client works fine. Strange.
Any other ideas for distinquishing 1 and 2? The firewall settings around 
both client and server are pretty extreme.

-- 
Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St, 
Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232


Notice: This email and any attachments are confidential. If received in error please destroy and immediately notify us. Do not copy or disclose the contents.