Multiple IP addresses and NAT

If my ISP gives me a block of 8 IP addresses, can I still use NAT to
map them to (possibly more than 8) internal addresses? The idea would
be to map some of the IPs to certain machines but have no incoming
connections to the others, with outgoing connections using NAT. I
don't want to have two separate networks internally, so even the
externally accessible machines would have to use NAT to translate
their internal addresses to their external ones.

Will my Speedtouch 510 router be able to do this?

-- Richard

On 18 Nov 2005 17:51:48 GMT, (E-Mail Removed) (Richard Tobin)
wrote:

>If my ISP gives me a block of 8 IP addresses, can I still use NAT to
>map them to (possibly more than 8) internal addresses? The idea would
>be to map some of the IPs to certain machines but have no incoming
>connections to the others, with outgoing connections using NAT. I
>don't want to have two separate networks internally, so even the
>externally accessible machines would have to use NAT to translate
>their internal addresses to their external ones.
>
>Will my Speedtouch 510 router be able to do this?

I don't think so. The only equipment I have seen doing this is a
Cisco Pix, which we use this for at work.

Andrew.
--
Andrew Hodgson in Bromyard, Herefordshire, UK.
My Email: use <andrew at hodgsonfamily dot org>.

Andrew Hodgson wrote:

> On 18 Nov 2005 17:51:48 GMT, (E-Mail Removed) (Richard Tobin)
> wrote:
>
>>If my ISP gives me a block of 8 IP addresses, can I still use NAT to
>>map them to (possibly more than 8) internal addresses? The idea would
>>be to map some of the IPs to certain machines but have no incoming
>>connections to the others, with outgoing connections using NAT. I
>>don't want to have two separate networks internally, so even the
>>externally accessible machines would have to use NAT to translate
>>their internal addresses to their external ones.
>>
>>Will my Speedtouch 510 router be able to do this?
>
> I don't think so. The only equipment I have seen doing this is a
> Cisco Pix, which we use this for at work.
>
> Andrew.

I have 2 routers at home a Cisco 837 and a draytek 2600 vg both are capable
of doing what you require .

The draytek would be much easier to configure unless you are familiar with
cisco,but if you were you would not have asked the above question I
suppose.
--
Output certified Microsoft free
Checked with Suse 10.0

In article <(E-Mail Removed)>,
Andrew Hodgson <(E-Mail Removed)> writes:
> On 18 Nov 2005 17:51:48 GMT, (E-Mail Removed) (Richard Tobin)
> wrote:
>
>>If my ISP gives me a block of 8 IP addresses, can I still use NAT to
>>map them to (possibly more than 8) internal addresses? The idea would
>>be to map some of the IPs to certain machines but have no incoming
>>connections to the others, with outgoing connections using NAT. I
>>don't want to have two separate networks internally, so even the
>>externally accessible machines would have to use NAT to translate
>>their internal addresses to their external ones.
>>
>>Will my Speedtouch 510 router be able to do this?
>
> I don't think so. The only equipment I have seen doing this is a
> Cisco Pix, which we use this for at work.

I'm doing this using Solaris x86 on an old PC as the router
with IPfilter for the firewall and NAT handling. I have a
few systems and appliances with dedicated IP addresses, and
everything else and visitor dhcp'd systems get mapped onto
a single address.

--
Andrew Gabriel