Questions tagged [dnat]

For questions about or involving Dynamic Network Address Translation (DNAT), where like static NAT, it is not common in smaller networks but is found within larger corporations with complex networks. The way dynamic NAT differs from static NAT is that where static NAT provides a one-to-one internal to public static IP address mapping, dynamic NAT usually uses a group of available public IP addresses.

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NAT overload and access to web resources

I have really bizarre problem in clients network. Clients have access to the internet via NAPT - I'm using several public ip addreses for this purpose. (I'll change ip addresses for obv reasons) ip ...
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1answer
114 views

Juniper port forward range of ports with dynamic pppoe

I have Juniper SRX300. Due to some restrictions, i can't use static WAN IP address. I need to port forward a range of ports and it's working only using nat static section like this: username# show ...
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190 views

Why does NAT keep track of each packet not just connections?

I have tried packet tracer and actual cisco routers and I find this weird: NAT uses different source ports, usually incrementally, for consecutive packets from the same connection. Why is that? ...
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1answer
743 views

Should DHCP relay and destination NAT work together?

Topology: [PC1]---lan----[RT1 / DHCP relay / DNAT]---wan---[DHCP server] [PC2]---------/ / [PC3]----------/ DHCP relay makes the a DHCP broadcast into a unicast and Forwards it to the DHCP server ...
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2answers
475 views

NAT simultaneous tcp connection Open

I am trying to understand how the NAT behaves when two peers behind two NATs with two different public ip Addresses try to establish a TCP connection using simultaneous open. I did some research and ...
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1answer
906 views

use PAT and static nat at the same time as inside and global nat interface

I've setup a network consisting a "AUTOMAÇÃO->Automation" lan, "Rede interna->Internal network" and the WAN (f0/1). Every device is cisco except 200A (fortigate). Everyone on internal network must ...
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2answers
1k views

Alias IP Address in VyOS

I have a network where I am looking to alias an IP address/port and redirect it to another machine. VyOS is on my network at 192.168.55.1 and I have another device on the network at 192.168.55.66. I ...
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1answer
1k views

Understanding NAT loopback problem

I'd like to understand why trying to connect to a server in the same network, using the public IP address (provided by the router/NAT), and the port doesn't' work. (I'll assume two interfaces in the ...
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2answers
8k views

Mikrotik RouterOS - NAT to multiple ports on the same IP [closed]

Some network services require a group of open ports, and those might not even be next to each other (by port number, I mean). What I'm doing still is I create a dst-nat rule for each port that ...
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1answer
694 views

Cisco ASA Static NAT with SLA tracking

I don't believe this is possible iwth the Cisco ASA series, but figured I would as the community. If I have an Cisco ASA, can I use the sla feature to track a NAT statement? for example. objReal1=10....
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9k views

Source NATing Fortigate typical scenario

I have a small query with respect to NATing in Fortigate.I'm struck in particular by a scenario where the remote network allows users with a specific IP range with a specific port for RDP over a ...