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Full Discussion: Snmp and NAT
Special Forums UNIX and Linux Applications Infrastructure Monitoring Snmp and NAT Post 302751521 by neutrino on Friday 4th of January 2013 05:15:58 AM
Old 01-04-2013
Network Snmp and NAT
Hello,

I am facing this scenario: three or more remote LAN (peripheral offices), with the same devices (printers, NAS) in each of them. Those LANs have the same network addresses, i.e.192.168.1.* (are connected to WAN via NAT).

I need to collect snmp traps from a central server (public IP).

Question: how can I distinguish traps sent from two devices in different remote locations? Suppose I receive a trap from printer HP2605 with IP 192.168.1.50: I have two or more printers HP2605, same IP, in different remote offices.
Which one has generated the trap?

If you think, even for a single LAN the proble arises: two or more identical laptops in DHCP, sending traps to a server: how recognize the device sending the trap, if IPs are dynamic?

Many thank for thinking with me.
 

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LEARN ABOUT CENTOS

cups-browsed.conf

cups-browsed.conf(5)													      cups-browsed.conf(5)

NAME

       cups-browsed.conf - server configuration file for cups-browsed

DESCRIPTION

       The cups-browsed.conf file configures the cups-browsed daemon. It is normally located in the /etc/cups directory. Each line in the file can
       be a configuration directive, a blank line, or a comment. Comment lines start with the # character.

DIRECTIVES

       The BrowseAllow directive specifies a system or network to accept CUPS browse packets from. The default is to accept  browse  packets  from
       all hosts when BrowseRemoteProtocols uses the CUPS protocol.

	       BrowseAllow 192.168.7.20
	       BrowseAllow 192.168.7.0/24
	       BrowseAllow 192.168.7.0/255.255.255.0

       The  BrowsePoll	directive  polls a server for available printers once every 60 seconds. Multiple BrowsePoll directives can be specified to
       poll multiple servers. The default port to connect to is 631.  BrowsePoll works independently of whether  CUPS  browsing  is  activated	in
       BrowseRemoteProtocols.

	       BrowsePoll 192.168.7.20
	       BrowsePoll 192.168.7.65:631
	       BrowsePoll host.example.com:631

       The  BrowseLocalProtocols  directive  specifies	the protocols to use when advertising local shared printers on the network. The default is
       "none". Control of advertising of local shared printers using dnssd is done in /etc/cups/cupsd.conf.

	       BrowseLocalProtocols none
	       BrowseLocalProtocols CUPS

       The BrowseRemoteProtocols directive specifies the protocols to use when finding remote shared printers on the network.  Multiple  protocols
       can be specified by separating them with spaces.  The default is "dnssd cups".

	       BrowseRemoteProtocols none
	       BrowseRemoteProtocols CUPS dnssd
	       BrowseRemoteProtocols CUPS
	       BrowseRemoteProtocols dnssd

       The  BrowseProtocols  directive	specifies  the	protocols  to use when finding remote shared printers on the network and advertising local
       shared printers. "dnssd" is ignored for BrowseLocalProtocols. Multiple protocols can be specified  by  separating  them	with  spaces.  The
       default is "none" for BrowseLocalProtocols and "dnssd cups" for BrowseRemoteProtocols.

	       BrowseProtocols none
	       BrowseProtocols CUPS dnssd
	       BrowseProtocols CUPS
	       BrowseProtocols dnssd

SEE ALSO

       cups-browsed(8)

       /usr/share/doc/cups-filters/README

AUTHOR

       The authors of cups-browsed are listed in /usr/share/doc/cups-filters/AUTHORS.

       This manual page was written for the Debian Project, but it may be used by others.

								   29 June 2013 					      cups-browsed.conf(5)
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