* Hans Peter Verne <[EMAIL PROTECTED]> > Now and then, we find a sheet with garbage on it, that appears to have > reached the printers outside the normal queuing mechanisms, there are > no log entries.
I have seen such pages printed on HP printers directly connected to the Internet that lack access restrictions and passwords set. Configuring the printer to limit access and have passwords prevents the garbage pages from being printed, which can be done over telnet or in a properly formatted TFTP boot file. The syntax each HP printer accepts varies by model, and firmware upgrades may reset the printer back to an open state despite a TFTP boot file. SNMP and syslog logging work well; HP printers will log TFTP boot file reading errors to syslog, along with password authentication attempts. For properly configured printers, I have been seeing authentication failures from random off-site systems in the logfiles. May 25 23:36:57 color printer: authentication failed from 210.58.87.62 The printer in question is nowhere near the above IP address (selected randomly from the logs) that appears to belong to a "Taiwan Cable Modem Service Provider." I have also heard references to malware for Microsoft systems that does various bad things to printers, which could account for the above garbled pages. Ensure the printer firmware is kept up-to-date, and if Microsoft systems must be used ensure all of them have proper anti-virus and firewall software configured and maintained, or otherwise isolate them from direct access to the printers and the Internet if possible. ----------------------------------------------------------------------------- YOU MUST BE A LIST MEMBER IN ORDER TO POST TO THE LPRNG MAILING LIST The address you post from MUST be your subscription address If you need help, send email to [EMAIL PROTECTED] (or lprng-requests or lprng-digest-requests) with the word 'help' in the body. For the impatient, to subscribe to a list with name LIST, send mail to [EMAIL PROTECTED] with: | example: subscribe LIST <mailaddr> | subscribe lprng-digest [EMAIL PROTECTED] unsubscribe LIST <mailaddr> | unsubscribe lprng [EMAIL PROTECTED] If you have major problems, send email to [EMAIL PROTECTED] with the word LPRNGLIST in the SUBJECT line. -----------------------------------------------------------------------------
