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Fire wall
A firewall security level can be set. Four different levels (high, medium, disabled, user defined) can be chosen to
disable unneeded network services.
The four security levels allow selecting between the following characteristics:
General Restrictions
X Display Manager
Font Server
Server
Network File System
Root Filesystem
High
TCP/UDP ports
daemons
Medium
TCP/UDP ports
daemons
Disable
TCP/UDP ports
daemons
User defined (don't change the existing firewall policies)
TCP/UDP ports, rsh-daemon,
login-daemon, secure shell
daemon
Barco – Argus X Terminal – DOC-3265-2 – user's manual – Revision 04 – May-2004
X Display Manager xdm can only be started and port 177 is only accessible,
if it was indicated in the section above (X Display Manager) to start xdm.
The Font Server xfs can only be used if it was indicated in the section
above (Font Server) to use a Font Server.
The Network File System NFS is only activated if a distributed system is
configured.
The root filesystem "/" is only exported if a distributed system is config-
ured and it can only be mounted to the rendering machines.
all ports less or equal 1023 are disabled except:
qual 1023 are disabled except:
TCP/UDP port 177 for XDMCP
TCP/UDP port 161 for SNMP
the following daemons are disabled:
ng daemons are disabled:
rsh-daemon
login-daemon
secure shell daemon
ure shell daemon
all ports less or equal 1023 are disabled except:
TCP/UDP port 177 for XDMCP
TCP/UDP port 161 for SNMP
NMP
TCP port 513 for rlogin
TCP port 514 for rsh
TCP port 22 for secure shell
the following daemons are enabled:
rsh-daemon
login-daemon
secure shell daemon
all ports are enabled
the following daemons are enabled:
rsh-daemon
login-daemon
secure shell daemon
None of these ports and daemons is disabled. Changes in the configuration
of these ports and daemons by the user, will not be changed by the X.11
configuration.
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3. Getting started
) can be chosen to
Table 3-2
Security options
3-49
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