How to use multiple WAN ip addresses given ISP.

[Baasanjargal_Ts]

How to use multiple WAN ip addresses given ISP. 

I want to set PAT, without using static NAT.

In other words, I want to configure Manual NAT for several public addresses on multiple lan hosts and dozen services.

[PhoneBoy]

More details about what you're trying to achieve will help.
Same with including a network diagram.

[Baasanjargal_Ts]

Network diagram is here.

[Maarten_Sjouw · Accepted solution]

You need to create a number of manual NAT rules above the Automatic rules like this:

When you do this above the automatic rules you can set the last internal with an automatic NAT as that will make sure the proxy ARP is also set.

From R80.20 proxy-ARP is also set for manual NAT rules but before that you needed to add them amnually on the gateway.

When you added the NAT rules and pushed them you can double check if the proxy ARP's are all set by typing 'fw ctl arp' on the gateway in cli.

[Vladimir · Accepted solution]

If you are trying to "multiplex" a number of target hosts or servers behind each of the public IPs you are given, you may have to resort to Manual Proxy ARP configuration on your gateway or cluster and then create a number of NAT rules reflecting each inbound path and translation.

I also think that for each group of target hosts using same public IP, you should create a "Summary NAT" rule for return traffic with "Hide Behind" that public IP.

If, on the other hand, you simply have multiple public IPs and each one correlates to a single host on private IP range behind gateway, simply use Static NAT in the properties of each object representing servers and create access rules pointing services to them.

Regards,

Vladimir