Java applet socket problem

[modalman]

Hi. I'm writing an applet that uses ftp. Whenever I try to set up a socket just before using the PORT command I get errors. Is this because I need to have permissions set in order to set this socket up?

My code to set the socket up isI is a socket that I am using on port 21 to send commands to the server):

try{
localAddress = I.getInetAddress();
svrSkt=new ServerSocket(0,1,localAddress);
}
catch(Exception e){
}

The error I get is:

com.ms.security.SecurityExceptionEx[d.tryPortPasv]: cannot access 0
at com/ms/security/permissions/NetIOPermission.check (NetIOPermission.java)
at com/ms/security/PolicyEngine.deepCheck (PolicyEngine.java)
at com/ms/security/PolicyEngine.checkPermission (PolicyEngine.java)
at com/ms/security/StandardSecurityManager.chk (StandardSecurityManager.java)
at com/ms/security/StandardSecurityManager.checkListen (StandardSecurityManager.java)
at java/net/ServerSocket.<init> (ServerSocket.java)
at d.tryPortPasv (d.java)
at Explorer.doCmd (Explorer.java)
at Explorer.getDirList (Explorer.java)

Huge thanks in advance for any help. ASCII silly question, get a silly ANSI

 

[shyamkumar]

Hi Please sign your applet and run your application. Then it is possible.

Are u opening the connection with the same server or to other server where the applet is downloaded. Then u need to sign it.

I mean Applet can open connection only to the server where it is downloaded from, otherwise u need a signed applet for to this work Shyam

 

[modalman]

Many thanks Shyam. That does make sense. Is that why PASV works and not PORT because PASV is setting a socket up on the server and not the client whereas port is trying to set up a socket on the client.

Thanks anyway

PS Do you happen to know any good signing tutorials? ASCII silly question, get a silly ANSI

 

[wushutwist]

Here is a link to a tutorial on Sun's site:

http://java.sun.com/docs/books/tutorial/jar/sign/index.html

Wushutwist

 

[shyamkumar]

Please Look into iplanet website for signing the jar.

ww.iplanet.com and search for it. I downloaded the tool from this site and worked out.

You will get signtool based on your OS.

Shyam Shyam

 

[modalman]

many thanks guys ASCII silly question, get a silly ANSI