Administrator Guide

228 Fabric OS Administrator’s Guide
53-1002920-02
Listener applications
7
1 any tcp 22 permit
2 any tcp 23 permit
3 any tcp 80 permit
4 any tcp 443 permit
5 any udp 161 permit
6 any udp 123 permit
7 any tcp 600 - 1023 permit
8 any udp 600 - 1023 permit
Unblocking Telnet
Use the following procedure to unblock Telnet access.
1. Connect to the switch through a serial port or SSH and log in as admin.
2. Enter the ipfilter
--delete command.
Refer to “Deleting a rule from an IP Filter policy” on page 259 for more information on deleting
IP filter rules.
3. To permanently delete the policy, type the ipfilter
--save command.
ATTENTION
If you deleted the rule to permit Telnet, you must add a rule to permit Telnet.
Listener applications
Brocade switches block Linux subsystem listener applications that are not used to implement
supported features and capabilities.
Table 33 lists the listener applications that Brocade switches either block or do not start. Note that
RPC ports are blocked.
TABLE 33 Blocked listener applications
Listener application Brocade DCX and DCX 8510 Backbone families Brocade switches
chargen Disabled Disabled
daytime Disabled Disabled
discard Disabled Disabled
echo Disabled Disabled
ftp Disabled Disabled
rexec Block with packet filter Disabled
rlogin Block with packet filter Disabled
rsh Block with packet filter Disabled
rstats Disabled Disabled
rusers Disabled Disabled
time Block with packet filter Disabled