Re: Understanding NAT, Firewalls, TCP/IP

Roedy Green wrote: 
The client would initiate connections and there is no client to client
communication.  Just traditional client to server.


Then NAT shouldn't be a problem for setting up the TCP connection.

I want wondering if there are firewalls that might by default block
outgoing tcp/ip connections to anything other than port 80 or FTP
ports.

Many, maybe not by default, but configured that way. And particular the software ones take the process into account which tries to set up the connection. If it is not your browser or some other trusted program, they complain. That's their job.

You can argue if software firewalls make sense at all, but the fact is, many people now have them. And particularly the people who couldn't handle their computer in the past and couldn't keep it clean, are now the ones who can't handle their firewall(s) ...


/Thomas
--
The comp.lang.java.gui FAQ:
ftp://ftp.cs.uu.nl/pub/NEWS.ANSWERS/computer-lang/java/gui/faq
http://www.uni-giessen.de/faq/archiv/computer-lang.java.gui.faq/
.

Relevant Pages

  • Webserver Security Problems
    ... the server at home, but while I am away at school, I ... through VNC, open the FTP ports, upload the changes, close ... checked the local permissions, and the entire drive's ...
    (microsoft.public.inetserver.iis)
  • Re: proftpd.conf help
    ... Server name: ftp.myftp.ca ... FTP ports: 21 & 2121 ... ftp root directory is at /srv/ftp/root. ... private user directories are at /srv/ftp/private. ...
    (alt.os.linux)