Port Scan - Socket Connect

[dan kisting]

Hi,

I wrote a chat program and it uses Sockets to connect. There is no
intentional port scan going on, however I am seeing tons of port scans
on that port in our firewall, and it (the firewall) continues to
operate around 35% CPU utilization during peak hours. Is there
anything I should look at to make sure that I am not doing or opening
up any holes?

[jasco4617]

Can you post the code that creates and manages the sockets?

[dan kisting]

Connect Method:

private SocketWrapper.F riendlySocket _socket;
_socket = new SocketWrapper.F riendlySocket(A ddressFamily.In terNetwork,
SocketType.Stre am, ProtocolType.Tc p);

// Events
_socket.SocketC onnected += new
SocketWrapper.O nSocketConnecte dHandler(Socket Connected);
_socket.DataRec eived += new
SocketWrapper.O nDataReceivedHa ndler(GotData);
_socket.DataSen t += new SocketWrapper.O nDataSentHandle r(SentData);
_socket.Error += new SocketWrapper.O nErrorHandler(E rror);
_socket.SocketD isconnected += new
SocketWrapper.O nSocketDisconne ctedHandler(Dis connected);
string ipAddress = Dns.Resolve(_se rver).AddressLi st[0].ToString();

if (_socket.Connec t(ipAddress, int.Parse(127.0 .0.1), 2))
return true;
else
return false;

Destructor:

~ServerConnecti on()
{
_loggedIn = false;

try
{
if(_socket != null)
{
if(_socket.Conn ected)
SendMessage(0, MessageType.Log out, "");

_socket.Disconn ect();
}
}

Disconnect:

public void Disconnect()
{
try
{
if ( (_socket != null) && (_socket.IsConn ected) )
_socket.Disconn ect();
}
catch
{}
finally
{
_socket = null;
_server = null;
_username = null;
_UserID = 0;
_teamName = null;
_lastError = null;
_parent = null;
}
}