[j-nsp] SRX Source NAT internal users to two or more public IPs

huy phuong tnhphuong at gmail.com
Fri Jul 19 04:02:04 EDT 2013


you can using persistent-nat like kb below:

http://kb.juniper.net/InfoCenter/index?page=content&id=KB21296

regards,

Phuong


On Fri, Jul 19, 2013 at 1:04 AM, William McLendon <wimclend at gmail.com>wrote:

> hi all,
>
> We have an issue where we have enough internal users and sessions using
> the general outbound NAT that we are hitting the session limit for the
> single public IP due to running out of ports. (really its due to how Source
> NAT is carved up on an HA pair…see http://kb.juniper.net/KB14958 )
>
> However I think if just add additional IPs to NAT the users to, it may end
> up breaking some applications as they establish a new outbound session from
> clicking a URL or something, but that session gets NAT'd to the other IP
> that the far side is not expecting to see it from.
>
> I think ScreenOS had something called Sticky DIP that could help mitigate
> this where for some NAT Timer, any session initiated by an IP address would
> always be NAT'd to the same public IP -- does SRX have a similar feature?
>  If not, I think my only other option then would be to carve up the
> internal networks, ie 10.10.10/24 NATs to public IP A, and 11.11.11.0/24NATs to public IP B, etc. which is probably ok, but can get a little
> cumbersome.
>
> Or if anyone knows another way please share :)
>
> Thanks,
>
> Will
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