Does Lenix have a ARP statement?

On Tue, 2 May 2006, in the Usenet newsgroup comp.os.linux.help, in article
<Bobreinh.276zpa@dev.null.thisishull.net>, Bobreinh wrote:
[color=blue]
>Question from a new Linux user. I am setting up a Enterprise Linux 3.0
>server with Checkpoint Firewall. I have a Windows 2003 server now that
>is running Checkpoint. The W2003 needs an Arp batch file to translate 2
>ip address on the Internet to the external interface of the firewall to
>keep its address hidden.[/color]

That question makes no sense at all. 'arp' is a network protocol used to
translate between hardware address and network address - in the case of
IPv4, see RFC0826. You appear to be speaking about proxy-arp or masquerading.
[color=blue]
>The batch file I have in W2003 looks like this:
>
>arp -s 71.242.255.20 00-08-02-ac-d8-74[/color]

That would appear to try to associate the IPv4 address 71.242.255.20 to the
'00-08-02-ac-d8-74' MAC address - which would be a Compaq of some kind.
[color=blue]
>Does Linux have some kind of Arp command? What is it and where can I
>find it?[/color]

[compton ~]$ whereis arp
arp: /sbin/arp /usr/man/man8/arp.8
[compton ~]$

Where the fsck do you think microsoft got the concept for that command?
Ethernet existed long before microsoft discovered hard disk drives. Heck,
look at the date of the RFC!
[color=blue]
>What is the best way to get it to run at startup?[/color]

If you are trying to tell Linux to proxyarp, then put the command in one
of the boot scripts - you say 'Enterprise Linux 3.0' so I _guess_ that is
either Red Hat or a clone (surprise, there are quite a number of
distributors who have released an 'Enterprise Linux' version), and
rc.local would be an appropriate file.

If you are trying to set a NIC to that hardware address, the command used
is /sbin/ifconfig, but this is also a configuration variable in boot scripts.
For a Red Hat based system, setting the 'HWADDR=' variable in the appropriate
network configuration file (/etc/sysconfig/network-scripts/ifcfg-eth0 for
example) to 00:08:02:AC:D8:74 should work, assuming the network card will
accept changing the MAC address (not all do).

Old guy