On Sat, 2005-10-22 at 14:39 -0500, Randy B wrote:

> > 
> > Basically I'm concerned about "what if it fails?"  - keeping same as
> > external IPs would allow me to simply take of pfSense and temporary use
> > local firewalls.   It is not great but better than having it down.
> 
> After thinking further, I think I'd recommend the NAT, myself - that 
> way, should one of your internal hosts fail, it would be a rather simple 
> operation to map it's external IP to another internal host's internal IP.

Right.  My point in this case if pfsense fails I can't simply remove it
and have my boxes directly available to the internet.

This might sound strange and insecure but I hope this will not need to
happen plus - this is hosting environment - these are Linux boxes which 
already do not have much stuff open outside so the risks are not that
high. 


> 
> You'd either set up a mapping between, say, 192.168.0.1/29 and your 
> external block.  pfSense would then map 192.168.0.1 to your first 
> external up through 192.168.0.8 to your last; you could also do that 
> mapping manually, it's really up to you.  You'd still maintain the 
> internal private IPs, and would probably want to set up your internal 
> DNS to point to them instead of your external ones, but (depending on 
> what firewall rules you set up) will have access to each one of them via 
> their independent external IPs.

Right.  I actually though to use load balancer for HA purpose - well if
it works as needed.   Also in worse case scenario I can simply change
external address on the box - this is not a bit problem as I have
"private" interface going. 


> 
> That, and I too recommend putting up two firewalls and CARPing between 
> them - even with reasonably cheap hardware, you're going to get far 
> greater reliability and easier maintenance than with one really 
> expensive, really good piece of hardware.  If your concern is 
> availability, that, by far, is the way to go.

Right. I guess I will be looking at CARP later on if high availability
does not proves to be enough.

I have smaller, kind of hobby project which I'm to use this for so If I
can fix problem in half an hour it is already good enough. 






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