NAME

       ndpmon - Neighbor Discovery Protocol Monitor

SYNOPSIS

       ndpmon [ -i interfacename ] [ -f configfile ] [ -d dtd_file ] [ -F filter ]
              [ -n number ] [ -L ] [ -v ] [ -h ] [ -d dtd_file ]
              [ -g neighbor_file ]

DESCRIPTION

       NDPMon  is   a  monitoring software for ipv6 Neighbor Discovery. It syslogs activity and reports by email
       malicious ND message.  NDPMon uses libpcap to listen for icmp6 packets and libxml2 to  use  configuration
       and neighbor cache files.

       The -i flag is used to change the default interface eth0.

       The   -f   flag   is   used   to   change   the   path   of  the  configuration  file.   The  default  is
       /etc/ndpmon/config_ndpmon.xml

       The -e flag is used to change the path to the DTD  file  for  the  configuration  file.  The  default  is
       /etc/ndpmon/config_ndpmon.dtd

       The -n flag uses libpcap to specify a limited number of packet to capture.

       The -F flag allows one to change the default icmp6 filter.

       The -L flag is used to disable syslog and mail reports. This is used to do a learning phase and constitue
       the neighbor cache.

       The -v is used to enable the DEBUG mode.

       The -d flag is used to change the  path  to  the  DTD  file  for  the  neighbor  cache.  The  default  is
       /var/lib/ndpmon/neighbor_list.dtd

       The   -g   flag   is   used   to   change   the   path   to   the   neighbor   cache.   The   default  is
       /var/lib/ndpmon/neighbor_list.xml

       Note that an empty neighbor_cache.xml file must be created before the first time you run ndpmon.

       NDPMon must be run with root rights to work.

REPORT MESSAGES

       Here's the list of the report messages generated by ndpmon:

       wrong couple MAC/IP
              Separately, the MAC and IP addresses are valid, but not as a couple.

       wrong router mac
              The ethernet address of the RA message is not specified in the configuration file.

       wrong router ip
              The ip address of the RA message is not specified in the configuration file.

       wrong prefix
              The prefix announced in the RA message is not specified in the configuration file.

       wrong router redirect
              The RD message does'nt come from a router specified in the configuration file.

       NA router flag
              The NA specifies a router but isn't one according to the configuration file.

       DAD DOS
              The NA answer to NS to avoid it to get an ip address.

       changed ethernet address
              The host switched to a new ethernet address.

       flip flop
              The ethernet address has changed from the most recently seen address to the second  most  recently
              seen address.

       reused old ethernet address
              The  ethernet  address  has  changed from the most recently seen address to the third (or greater)
              least recently seen address.

SYSLOG MESSAGES

       Here are some of the syslog messages; note that messages that are reported are also sysloged.

       new activity
              This ethernet/ip6 address pair has been announced for last time two months or more.

       new station
              The ethernet address has not been seen before on the link.

       ethernet broadcast
              The mac ethernet address of the host is a broadcast address.

       ip broadcast
              The ip address of the host is a broadcast address.

       bogon  The source ip address is not local to the local subnet.

       ethernet mismatch
              The source mac ethernet address didn't match the address announced in option of the ND message.

FILES

       config_ndpmon.xml - contains settings which must be fill by the administrator
       neighbor_list.xml - neighbor cache: all neighbors known to be on the link

SEE ALSO

       arpwatch(8) ipv6(7), pcap(3), libxml(3).

AUTHOR

       Thibault Cholez and Frederic Beck for MADYNES Project, Loria, Fr.

BUGS

       Please send bug reports to frederic.beck@loria.fr
              or thibault.cholez@esial.uhp-nancy.fr

                                                  November 2006                                        NDPMON(8)