Questions tagged [nat]

Network Address Translation, a technology used to translate a private IP address into a public IP.

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How can I set up domain-name-access to home server using cloud server with public IP and VPN?

srv_pub srv_target +-----------------+ +---------------------+ Internet | VPS | VPN 10.8.0.0/24 | HOME SERVER | -------...
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How to lower CPU usage while using iptables NAT

I have 5 VM's : VM-A,VM-1,VM-2,VM-3,VM-4 I using wireguard to connect VM-A to all other VM's. The traffic transfer rate is around 200Mbps. All the VM's have 5gbps network. But the CPU is rising to 95%....
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Google Cloud HA VPN. NAT a 10.0.#.#/24 subnet to 10.182.#.#/32

We have setup a HA VPN connection to a client system using our internal 10.0.#.#/24 subnet range. We would now like to NAT the 10.0.#.#/24 subnet to a 10.182.#.#/32 address. The client system would ...
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Secure DNS, NAT, DSNMASQ, and local addresses

My home network consists of an ISP supplied router, a Raspberry PI providing DHCP, DNS with dnsmasq, including local addresses behind NAT. Some weeks ago, I noticed that when I tried to connect to my ...
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How to access Synology git server remotely?

I can access the git server when using the same WiFi. But if I switch to mobile network, I can no longer access it. DSM version 7.0 Does the NAS have a VPN or other phone home to get me back to the ...
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Why VirtualBox NAT failed to resolve domains?

I'm using virtualbox (last version) and running a "Windows 10" machine on it. Although I easily ping 4.2.2.4 and get responses but ping google.com fails. Machine adapter is NAT mode and ...
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How to forward openvpn/wireguard to another wirdguard interface without modifying global route table?

I have one wireguard interface wg_vpn, but I don't want it to be global, so I add the line "Table = off" to the wg_vpn.conf to prevent wg-quick to modify the route table. I also have an ...
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My network setup do not work. FreeBSD

This question was asked by me on serverfault.com. It was closed as off-topic, with a suggestion to ask here, on superuser. The OS is FreeBSD 13.0. The setup that I need to establish is simple. In ...
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When I set up port forwarding on my home router, why does connecting to a local server via the public IP show the router's address as the client IP?

I'm trying to understand how NAT works on a basic level within my home network (just a consumer Google Fiber router with no custom configuration other than the port forwarding I'm about to describe). ...
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iptables v1.8.7 (legacy): unknown option "--to-ports"

I am trying in libreelec, that all traffic is redirected to a docker with tor and privoxy, the problem that when entering the iptables rule returns "iptables v1.8.7 (legacy): unknown option "...
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What is the name of a Network Switch that can do NAT and DHCP? [closed]

I have an industrial system composed of several devices (ip-cameras, PC, ethernet sensors...). Unfortunately most of them don't have DHCP or don't have a hostname. Thus, I cannot install this system ...
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Load Balancing using Iptables for UDP

I have 3 VMs. VM-A VM-B VM-C Whenever any incoming traffic comes to udp port 9110 of VM-A, How can I equally divide and redirect that traffic using NAT (MASQUERADE) Like for eg if incoming traffic ...
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Can I use a dynamic DNS service to bypass blocked ports?

From another post I consider the fact that I might be behind a "Carrier Grade NAT".. This technology disables port forwarding.. Okay.. I am not sure how to fix my current situation.. Can I ...
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Port forwarding with multiple WAN default routes in OpenWRT

I have an OpenWrt setup with multiple WAN connections, and a DNAT port redirect that provides access to a server in my LAN. I want my server to be accessible on both WAN connections simultaneously. I ...
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"Network cable unplugged" on Cloned Hyper-V VM

I created a VM on one Hyper-V host (actually Windows Server 2022 Core). The VM is running Windows Server 2022. Works great. I have NAT running on the host and the VM is on 192.168.1.2 and using 192....
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VMWare: The private IPs of my Virtual machines configured on NAT still perfectly visible on host machine

I have 2 virtual machines configured and running on VMWare (Ubuntu and Kali). Both these machines are attached have a single network interface configured on VMWare which is the NAT interface. From my ...
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Cisco Router - not saving nat routing information in startup script

I have a client with an old Cisco Router (Cisco 2851 (revision 53.51)), using Cisco IOS Software, 2800 Software (C2800NM-IPBASE-M), Version 12.4(3i). I needed to open a new routing port to a computer ...
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Relay TCP upload traffic and make download traffic go directly to the client

This is a supplement for iptables SNAT for UDP rule is only applied to some traffic In fact, I have three machines: the client the target server the relay server What's my motivation for doing this? ...
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iptables SNAT for UDP rule is only applied to some traffic

I want to use Source NAT to change the local IP address of UDP traffic. However, only locally-generated traffic has the NAT rule applied, replies to traffic generated from remote sources do not have ...
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How to SSH to a to a VirtualBox VM on a Windows host with NAT from another PC on the same LAN?

I have an Ubuntu 20.04 VM (VirtualBox) on a Windows 11 host. The network is attached by NAT. I have port forwarding in VirtualBox as follows: Name | Protocol | Host IP | Host Port | Guest IP | ...
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Unable to connect to device which is on the same router in network using external IP and external port

I am not sure if this is the right place to ask this question but here goes. I have a modem with ONR fibre connected to the internet. It has 4 Lan ports. 1, 2, 3, 4. I have 1 PC and 3 routers ...
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Send private client IP using SNAT to my php web server

I have the next topology Topology The clients have a private ip 192.168.0.x And I have two NAT servers The server 1 has an interface with the gateway for the clients with 192.168.1.254 and has an ...
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Cannot access my public IP outside the network

So I want to test opening one port to the public. I know how to do port forwarding in the router and I have done so. I tested this with gameranger and it works. I check my global IP, say it is 121.111....
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Using host & iptables as bastion before mongoDB

I am trying to setup a config on a "bastion/NAT" host. I have 2 mongoDB host, which are behind firewall, my bastion and a set of clients. my bastion has main IP: 10.198.24.10 and 2 aliases: ...
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Reverse proxy stuck in "Client Hello" step - nginx [duplicate]

The current situation is, I have the typical router+nat->reverse proxy->service format. If I do the call from a pure external client (a mobile phone via LTE), everything works perfectly. If I do ...
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Port forwarding on ZTE router

I'm trying to forward the following ports on my ZTE router (as per PlayStation's recommendations): TCP: 80, 443, 3478, 3479, 3480 UDP: 3478, 3479 The manual for my router gives very limited ...
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Source Port NAT with VPN

I understand that a router (like an home router) does source port NAT (as the public IP for a LAN is normally one). If I run a VPN Client (like Open VPN) on a computer in the LAN and if the VPN packet ...
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Port forwarding does not work (trying to make my computer an HTTP server)

Goal: Allow one person to connect remotely to my (Django) webserver which runs locally on my windows 10 machine, for a week or so. What I tried: Disabled firewall (Windows), there seems to be no ...
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Access home network Linux server (samba and other services) behind operators NAT (no public IP4 address)

this is my first question here... I have got home small Linux server with RAID1 disks and few services (samba, ssh, minidlna) serving Windows 10 machines Home network is connected to operator's ...
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Linux IPTables-Based Reverse Proxy

I have 2 Public IPs on a VPS and a residential network connection: VPS = 55.55.55.55 Residential = 66.66.66.66 The VPS all this is done on is a Debian 11 system with minimal changes. I would like to ...
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How to reach "WAN SIDE" of my lan

maybe this is a silly question and the answer is simple. I set my router DMZ (zyxel router) to my dev server (Dns updated dynamically) and everything works good from outside my network. From inside my ...
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ASUS Router VPN Client not masking IPs

I am currently trying to set up 2 routers in my home network, one of which is connected to a VPN to mask the IP of any device in its subnet as seen below: The VPN is definitely set up correctly, as ...
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How to configure VirtualBox NAT to use host WLAN

Is it possible to explicitly tell the VirtualBox NAT connection to use the host's WLAN to provide internet to the guest system? Question background/ my specific problem right now: My VirtualBox guest ...
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Providing Hyper-V VMs with network through custom NAT in Windows 10

I'm trying to set up a NAT on Windows 10 to provide Hyper-V VMs with access to both Internet and Cisco AnyConnect VPN configured on the host machine. In accordance with this manual I executed the ...
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Can I have 2 routers in a network without bridging

My ISP-supplied router is very bad. I have a lot of issues with the NAT rules, NATLOOPBACK, UPNP ... I will buy another one (Router 2). I have to keep the old one connected as a master (Router 1). I ...
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VMWare route certain http requests through Windows Host

I am running Ubuntu 18.4 as guest on a Windows 10 host under VMware 15.5.6 Current Network-Connection (Settings->Network Adapter) is set to NAT. My problem is, that certain http requests must (...
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How does Resilio Sync connect from the internet when there's a firewall and no port is listening?

Resilio Sync, formally BitTorrent Sync is able to somehow find a way around 2 NAT firewalls I have all while no port is setup to listen externally nor port forwarding on the routers. When I say I have ...
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Routing behind CGNAT

Goal: Trying to have my devices be accessible by Mikrotek router so I can do port forwarding. I recreated the network on Cisco Packet Tracer. Plex can ping the USG router but it can not ping the ...
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open network access to virtualbox guest from host only

I have built a Debian virtual machine running in VirtualBox on a Linux Mint host. I am confused about the choices for networking configuration. I wish to achieve the following behavior: Resolve host ...
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Virtualbox Ubuntu NAT - one VM has internet, other does not

I have one VM that is provided to me. It has NAT and Host-Only-Adapter enabled; it has internet access. I've installed two new VMs: Ubuntu 18.04 and 20. In both cases, I enabled NAT but there was no ...
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Access Android Emulator running on host machine (mac) from Vmware fusion 12.2.1 (Linux)

I am trying to run an Android Emulator on my host machine which is a Mac OS and connect to it from my Vmware fusion guest machine which is a Linux. I tried all network configurations and also tried to ...
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What exactly is router cascade option doing? [duplicate]

I'm trying to understand what exactly happens when routers are cascaded. All description I can find state that it is done when I want to connect router to router but I can do it without any setup. So ...
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Can't SNAT computer to internet

I have 2 computers in 10.10.10.0/24 network (.3 & .4), only .3 has internet access. I need to get .4 access to inet through .3. .3 has only one eth interface, used for wan and lan, no public ...
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Hyper-V: NAT not functioning / guest cannot access internet

I'm running Windows 11 Pro, and have set up a FreeBSD VM under Hyper-V. Initially, the VM was using the default virtual switch, and internet access from the VM worked correctly. But in an attempt to ...
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What scope and lifetime do carrier grade NAT IP address mappings tend to have?

One of the primary differences between consumer NAT and carrier grade is that CG NAT usually has a pool of global IPs to share with customers while consumer NAT has one address provided by the ISP. ...
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Translate WireGuard config from iptables to nft

I was installing WireGuard on a fresh Raspberry Pi OS image and wanted to move the server config from another device onto this. But bringing up the interface said it can't find the iptables command. ...
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How to configure dnsmasq as a DNS server, alongside apache, so that a DNS domain that points to internal IP is accessible by the same server and LAN

I have an web server running apache web server in my home network. My router unfortunately does not allow NAT loopback, so testing my own projects, or accessing other self-hosted services (owncloud, ...
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Is there any way to bypass CGNAT for host servers?

This question is a follow up an earlier question : Why is google showing me a different external IP address than router So it is established that I am behind a CGNAT. My ISP is unlikely to allow me ...
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Vmnet8 Interface is not forwarding packets to the vm

I have a vm connected to the vmnet 8 interface. I cannot reach the virtual machine from my host but it can reach the host from the vm. When i trace to the vm i see the host is sending the packet to ...
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Does My ONU Have Router Function?

I brought an ONU which has following functions: A DHCP server function, VLans optimization, LOID option, which used to get the ONU device authenticated by ISP. It has neither PPPoE/IPoE option, nor ...
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