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Special Forums IP Networking How to find the ip of ...
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Old 11-01-2011
A subnet acts like a logical bus. As far as the machines are concerned, they're all hooked to one long wire which connects to every machine. No hosts are more or less direct than any other; handling the direction of traffic etc. becomes the switches' jobs. The switches handle this by comparing MAC addresses.

If you have advanced enough switches you may be able to pull the network organization from the switch itself, but unless it's an expensive switch that's unlikely.

If a big bus isn't the organization you want, you have to start using routers and break things into more subnets. (Router in the routing sense, not router in the linksys sense. You probably don't want NAT by the sounds of it.)
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LEARN ABOUT HPUX

ftphosts

ftphosts(4)						     Kernel Interfaces Manual						       ftphosts(4)

NAME

       ftphosts - ftpd individual user host access file

SYNOPSIS

DESCRIPTION

       The file is used to allow or deny access to certain accounts from various hosts.

   Access Capabilities
       The formats to allow and deny access are described in this section.

       addrglob [ addrglob... ]

	      Only allow host(s) matching addrglob to log in as username.  addrglob is a globbed domain name or a globbed numeric address.

	addrglob [ addrglob ... ]

	      Always deny host(s) matching addrglob to log in as username.  addrglob is a globbed domain name or a globbed numeric address.

       A username of or specifies the anonymous user.

       The addrglob can also be specified as address/cidr or address:netmask.  For example:

	      or

   Specifying Both allow and deny Rules
       To allow a user to login from anywhere except the listed hosts, both allow and deny rules are required.

       The following example denies the user from logging in from the host but allows login from all other hosts:

EXAMPLES

       Allow the user, to login from the host named and from all hosts with numeric addresses starting with

       Deny (do not allow) the user, to login from the host named and from all hosts with numeric addresses starting with

       Allow the user, to login from the host named

FILES

AUTHOR

       was developed by the Washington University, St. Louis, Missouri.

SEE ALSO

       ftpd(1M), ftpaccess(4), ftpconversions(4), ftpshut(1).

																       ftphosts(4)