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Destination NAT using ipnat in Solaris 8

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Old 03-07-2008
Destination NAT using ipnat in Solaris 8
Hello People,

Please can someone help me with destination IP address NAT and Port transalation using ipnat in Solaris 8.

Scenario: Box A(192.168.100.1/24) and Box B (192.168.100.50/24) are connected phyically and logically(vlan) on the same network switch.

Box A hosts an application(client) which needs to talk with an application (server) on hosted on BOX B. The requirement here is that Box A application has restrictions contacting the server application using the physical IP(192.168.100.50) and actual port no(5555/tcp). So I am trying a Destination IP nat and port translation using ipnat (ipf verion 3.4).

For eg: Box A will contact Box B using NAT IP(10.1.1.1) and translated port(7777/tcp).

Please help!

Thanks!
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LEARN ABOUT NETBSD

ipnat

IPNAT(8)						      System Manager's Manual							  IPNAT(8)

NAME

       ipnat - user interface to the NAT subsystem

SYNOPSIS

       ipnat [ -dhlnrsvCF ] [ -M core ] [ -N system ] -f <filename>

DESCRIPTION

       ipnat  opens the filename given (treating "-" as stdin) and parses the file for a set of rules which are to be added or removed from the IP
       NAT.

       Each rule processed by ipnat is added to the kernels internal lists if there are no parsing problems.  Rules are added to the  end  of  the
       internal lists, matching the order in which they appear when given to ipnat.

       Note  that ipf(8) must be enabled (with ipf -E) before NAT is configured, as the same kernel facilities are used for NAT functionality.	In
       addition, packet forwarding must be enabled.  These details may be handled automatically when ipnat is run by rc at normal system  startup.
       See options(4), sysctl(8), and rc.conf(5) for more information.

OPTIONS

       -C     delete all entries in the current NAT rule listing (NAT rules)

       -d     Enable printing of some extra debugging information.

       -F     delete all active entries in the current NAT translation table (currently active NAT mappings)

       -h     Print number of hits for each MAP/Redirect filter.

       -l     Show the list of current NAT table entry mappings.

       -n     This  flag  (no-change)  prevents ipf from actually making any ioctl calls or doing anything which would alter the currently running
	      kernel.

       -r     Remove matching NAT rules rather than add them to the internal lists.

       -s     Retrieve and display NAT statistics.

       -v     Turn verbose mode on.  Displays information relating to rule processing and active rules/table entries.

FILES

       /dev/ipnat
       /usr/share/examples/ipf	Directory with examples.

DIAGNOSTICS

       ioctl(SIOCGNATS): Input/output error Ensure that the necessary kernel functionality is present and ipf enabled with ipf -E.

SEE ALSO

       ipnat(5), rc.conf(5), ipf(8), ipfstat(8)

																	  IPNAT(8)