Fabric OS Administrator’s Guide 131
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Listener applications 6
3. To permanently delete the policy, type the ipfilter --save command.
ATTENTION
If you deleted the rule to permit Telnet, you will need to 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 22 lists the listener applications that Brocade switches
either block or do not start.

Ports and applications used by switches

If you are using the FC-FC Routing Service, be aware that the secModeEnable command is not
supported in Fabric OS v6.1.0 and later.
Table 23 lists the defaults for accessing hosts, devices, switches, and zones.
TABLE 22 Blocked listener applications
Listener application Brocade 48000 director and Brocade DCX
enterprise-class platforms
Brocade 300, 4100, 4900, 5000, 5410, 5424,
5450, 5460, 5470, 5480, 5100, 5300, 5424,
7500, 7500E, 7600, 7800, 8000, and VA-40FC
switches; FA4-18, FC4-16, FC4-16IP, FC4-32,
FC4-48, FC8-16, FC8-32, FC8-48, FC10-6,
FCOE10-24, FR4-18i, FS8-18, and FX8-24 blades
chargen Disabled Disabled
echo Disabled Disabled
daytime Disabled Disabled
discard Disabled Disabled
ftp Disabled Disabled
rexec Block with packet filter Disabled
rsh Block with packet filter Disabled
rlogin Block with packet filter Disabled
time Block with packet filter Disabled
rstats Disabled Disabled
rusers Disabled Disabled
TABLE 23 Access defaults
Access default
Hosts Any host can access the fabric by SNMP.
Any host can Telnet to any switch in the fabric.
Any host can establish an HTTP connection to any switch in the fabric.
Any host can establish an API connection to any switch in the fabric.