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Form tabs
Use this form to configure the protocol with which you will connect to a server.


Protocol
The protocol you will use to connect to the server:
TCP/IP
TCP/IP connections
UDP/IP
UDP/IP connections
7202010_20004_0.png        Note
For information on the protocol to use, see Types of connections.


Settings tab
Use this tab to specify connection information.


Port number
The TCP/IP or UDP/IP port on the server.
If you change the default, you are changing it for every settings file that uses the TCP/IP or UDP/IP connection.
Proxy port
The port used to connect to the proxy server, if you connect through a proxy server.
The default value of 1080 is the normal proxy server port.
Proxy IP address
The proxy server's IP address, if you connect through a proxy server.
If you don't use a proxy server, leave this at 0.0.0.0.
Buffer size
Specify between 6000 and 64000.
The larger the buffer, the better the download performance, but the more memory you will need on the computer where the FirstClass client is installed. The default of 10000 is normally adequate.


Advanced tab
Use this tab to specify advanced connection information, including the information to trace.


Link options
Window
2102006_35208_0.png Only affects UPD/IP connections.
The size of the sliding window, in packets.
Choices are:
Auto
Your computer will determine the largest possible window size.
We recommend this choice unless your connection fits one of the special cases described for the other choices.
8
Choose this if you are connected over a link with long delays, such as a Wide Area Network (WAN) or satellite link.
This choice trades off slower file transfers for better response to commands.
16
Choose this on medium or slow connections, such as dialup.
32
Choose this to get the best performance on fast 10MB or 100MB Local Area Networks (LANs).
Packets
2102006_35208_0.png Only affects UPD/IP connections.
The maximum packet size.
You may need to set this if you are communicating over multiple network types. Larger packets are more efficient, but will slow down the response to other commands while file transfers are in progress.
Packet size choices are:
Auto
We recommend this choice unless your connection fits one of the special cases described for the other choices.
232
This will improve response to commands at the expense of file and text transfer speed.
512
Choose this for slower dialup connections to prevent file transfers from slowing down response too much.
This is the best choice for dialup IP.
1024
This is the best choice for maximum file transfer performance on fast 10MB or 100MB networks.
Lock
Whether to decrease the packet size if transmission errors are encountered.
Choices are:
None
Allows FirstClass to change the packet size.
We recommend this choice.
size
Locks the packet size at the size you choose.
Encrypt
Whether to encrypt transmitted data.
7202010_20004_0.png        Note
Remember that the level of security you choose will be used by default for all of your settings files which use this connection protocol. If you want to override this default for a particular settings file, update "Encryption" on the Service Setup form.
Choices are:
Password Only
Doesn't encrypt data.
Suitable for a secure network connection such as one that ties together your system's components when they are on different machines.
Secure
FirstClass standard encryption, which encrypts data at a basic level.
This is most frequently used on networks when you want a fast connection and aren't particularly concerned about security.
CAST-128
CAST-128 encryption, which encrypts data in a more secure manner than Secure. It is equivalent to the security used, for example, when you do banking on the Internet.
The first time you log in with CAST-128 encryption, you might find that it takes a little longer than normal to connect. You won't notice this slowdown on subsequent connections.
Trace options
The events for which you want trace information.
Selecting "Packets sent" or "Packets received" may decrease your link speed significantly, because FirstClass must then write a great deal of data to disk.
For more information