Appendix C: Tcp/Ip Ip Restrictions - GCC Technologies Elite XL-1208 Network Manual

TCP/IP

Appendix C: TCP/IP IP Restrictions

TCP/IP networking is peer-to-peer, which means that any computer on the
same network as your printer may connect to the printer. A connection to the
printer may be made by using telnet or lpr to send down print jobs, or by using
WebAdmin for configuration.
Whether your network is internal to your organization, or connected to the
Internet, you may wish to limit access to your printer to certain computers. For
example, in the most secure case you may decide that only one particular
computer may send TCP/IP print jobs to your Elite XL. A less restricted case
would be to allow all those on your subnet to connect, but to block out every-
one else on the Internet.
You can restrict IP addresses by entering pairs of IP addresses and masks. For
each range of addresses you want to allow, enter one of these pairs. Up to four
pairs can be defined. The printer will ignore communications from any IP
address that does not match any of the pairs. Be aware that selecting the
appropriate pairs requires knowledge of TCP/IP addressing schemes and
hexadecimal masks.
For each MASK/ADDRESS pair with a non-zero MASK, an IP address
X.X.X.X can connect to the printer if:
Note:
Restrict is set to Enabled.
For example, on a class A network, if you want to allow any subnet address on
the network 100.5, and the address 2.1.4.149 to connect to the printer, set up
two mask address pairs as follows:
MASK & ADDRESS = MASK & X.X.X.X (where & is a bitwise
AND operator).
If all the MASK values are set to zero, IP access will not be restricted, even if IP
Mask
Pair 1 FF.FF.00.00
Pair 2 FF.FF.FF.FF
Pair 3 00.00.00.00
Pair 4 00.00.00.00
Address
100.5.0.0
2.1.4.149
0.0.0.0
0.0.0.0
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