Yeah, I would just ping:
procedure TfrmConnectTest.btnPingClick(Sender: TObject);
begin
IdIcmpClient.Ping();
end;
procedure TfrmConnectTest.IdIcmpClientReply(ASender: TComponent;
const AReplyStatus: TReplyStatus);
begin
if AReplyStatus.ReplyStatusType=rsEcho
then caption:='Connected'...
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