Juniper NETWORK AND SECURITY MANAGER 2010.3 - CONFIGURING INTRUSION DETECTION AND PREVENTION GUIDE REV1 Manual page 118

Configuring Intrusion Detection and Prevention Devices Guide
Table 51: IDP Device Configuration: Protocol Thresholds and Configuration Settings (continued)
Setting Description
LPR Maximum Sub-command length in RECEIVE-JOB Command–Raises a protocol anomaly if IDP detects in
an Line Printer Protocol (LPR) control file a sub command line containing more bytes than the specified
maximum. LPR is a TCP-based print server protocol used by line printer daemons (client and server) to
communicate over networks. An LPR client uses the LPR protocol to send a print command to an LPR server
(a line printer) at TCP/515. After the print command is received by the server, the client can issue subcommands
to the server and send control and data files. Control files tell the line printer which functions to perform when
printing the file; data files carry the payload. The default is 256 bytes.
Maximum Reply length from server–Raises a protocol anomaly if IDP detects an LPR control filename
containing more bytes than the specified maximum. The default is 64 bytes.
Maximum Control filename length–Raises a protocol anomaly if IDP detects an LPR control filename
containing more bytes than the specified maximum. The default is 64 bytes.
Maximum Data filename length–Raises a protocol anomaly if IDP detects a data filename containing more
bytes than the specified maximum. The default is 64 bytes.
Maximum Control file size–Raises a protocol anomaly if IDP detects an LPR control file size greater than the
specified maximum. The default is 1024 bytes.
Maximum Data file size–Raises a protocol anomaly if IDP detects an LPR data file size greater than the
specified maximum. The default is 64 bytes.
Maximum Banner string length–Raises a protocol anomaly if IDP detects an LPR banner string containing
more bytes than the specified maximum. A banner string is typically the filename of the print job. The default
is 32 bytes.
Maximum E-mail length –Raises a protocol anomaly if IDP detects an LPR control file e-mail address containing
more bytes than the specified maximum. After the file has printed, it is sent to the e-mail address specified
in the control file. The default is 32 bytes.
Maximum Symbolic link length –Raises a protocol anomaly if IDP detects in an LPR control file a symbolic
link containing more bytes than the specified maximum. A symbolic link is a file that points to another file
(entry) in a UNIX file system, but does not contain the data in the target file. When the LPR protocol receives
a symbolic link command in a control file, it records the symbolic link data for the print job filename to prevent
directory entry changes from reprinting the file. The default maximum is 128 bytes.
Maximum font length –Raises a protocol anomaly if IDP detects in an LPR control file a font name containing
more bytes than the specified maximum. The default is 64 bytes.
Maximum filename length for format related sub commands–Raises a protocol anomaly if IDP detects in
an LPR control file a format-related file name containing more bytes than the specified maximum. The default
is 32 bytes.
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