Questions tagged [forwarding]

Redirect a port to another one, used to access a computer from behind a firewall.

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How to access https://localhost from other devices

I have a server program written on ASP.NET that I would like to access from other devices on the same network. What do I need to do in order to achieve this? Is there a program that handles this type ...
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Port Forwarding over VPN

I have a site that is behind CG-NAT that stops me from being able to easily open ports. I have setup an openvpn server on a digital ocean droplet and have pfsense onsite configured to connect to it. ...
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Cannot block autoresponses coming in to Postfix

I have an Ubuntu server with Postfix. I only use postfix for outgoing mail, there are no local mail boxes on this server at all. In /etc/aliases I setup forwarders to my gmail address. /etc/aliases ...
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How 2 dynamic (external) IP devices can talk to each other via 1 static (external) IP [closed]

I have 3 devices: Device 1 (Dynamic IP): A raspberry Pi sending UDP packets to Device 2 via 4G modem via Internet Device 2 (Static IP): My Ubuntu/Windows PC with static IP, successfully receives ...
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2answers
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Double VPN not working

I have setup OpenVpn in my raspberry pi and it works correctly, I can log in to my raspberry pi from my cellphone. I also installed a paid VPN (Windscribe) to my raspberry pi too. The problem comes ...
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1answer
60 views

Preserving source IP behind double-NAT network

I have a network scenario where double NAT-forwarding is happening. Public Firewall and Internal Firewall are doing NAT forwarding. I have only control of the Internal Firewall. Client: X.X.X.X Public ...
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1answer
37 views

Forwarding UDP traffic from one host to another

I have two hosts, each with 2 network interfaces: host1: eth0:172.16.125.5 eth1:172.165.8.55 host2: eth0:172.16.125.6 eth1:172.165.8.56 I want to forward all UDP traffic to host1:eth1 port 1234 to ...
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1answer
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redirecting udp traffic from one network interface to another on the same host

My host has two network interfaces: eth0:172.16.125.5 eth1:172.165.8.55 I want to redirect all UDP traffic to eth1 port 1234 to eth0 port 1234, ie: 172.165.8.55:1234 -> 172.16.125.5:1234 After ...
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1answer
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How can I forward email based on the send-from address?

So I have a unique situation. I work for an MSP and we host a Unix server in our environment for a customer that sends SMTP to our internal mail server. The problem is on this unix server, there are ...
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1answer
39 views

Router is not forwarding packets

So I have the following setup: (Net-1: 64.236.5.112/30) (Net-2: 64.236.5.12/30) 64.236.5.113/30 64.236.5.114/30 64.236.5.13/30 64.236.5.14/30 Router1 <-----...
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Unable to port-forward with firewall

I am trying to create a simple gateway with ubuntu that performs the functions of nat, firewall, and forwarding. With the firewall disabled I can connect to a web server located in a subnet that I ...
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1answer
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Is it possible to reveal URLs in a masked, server-side 301 redirect?

I work for a search monitoring company and I'm currently investigating some advertisements which are hiding malicious URLs in masked, server-side redirects. When users click these ads, they're ...
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1answer
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Forwarding request made to my server to another server on the same path

I need to create a sub-directory mapping in the Apache server such that each request made to the path /another-path gets forwarded to https://some-website/another-path. How could I do this? If the ...
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1answer
179 views

Forward incoming UDP Packets on Windows Server to client on different interface

I have the following setup with 2 networks and 3 clients: Network A: 192.168.0.0/16 Network B: 172.16.0.0/12 Client 1 is connected to Network A (192.168.0.1) Client 2 (Windows Server) is connected ...
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Iptables Forward All traffic to different interface except local inter-lan

I have Two LAN Local LAN: 172.30.30.0/24 with gw 172.30.30.254 Remote LAN : 192.168.2.0/24 with gw 192.168.2.1 both lan can communicate and ping each other devices. i have introduce new machine 172.30....
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KVM DNS forwarding not working / reply: REFUSED

I've set up a couple of VMs for development purposes for a project. The setup includes a local CA for the past, current and future project VMs. On the guest if can do dig staging.testing.lan and get ...
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1answer
54 views

Full network forwarder with linux

I want to use a linux machine as a full network forwader. Target "physical" architecture : machineA is connected to network1 with its own addressing plan machineB is connected to network2 ...
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1answer
35 views

How to forward http request to application running on port 80 with NGINX

The Ubuntu server is running, Glassfish on port 80(http) & 443(https) Nginx on port 8080(http) & 8081(https) The goal is, www.hostname01.com to access Glassfish, www.hostname02.com to access ...
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1answer
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mail can be send and received from outside network but mail (outlook or webamil ) not accessible from local network

my private block is 192.168.109.0/24 WAN is 82.198.x.x. and mail server is on 192.168.109.x. I have made the rules dst-nat for port 25,587,993 and 143 with destination 82.198.x.x forwarded to the mail ...
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VMware with 2 NICs forwarding

I have two computers in a VMware lab environment GW1 and SVR1 (so far) I want to set up a computer (GW1) with 2 NICs that functions as a gateway. One NIC is auto-bridged (as it says auto let's say IP ...
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Accessing VM Ubuntu Server's FTP by redirecting the ip and port

So I got Ubuntu Server 20.04 VM(Virtualbox) installed on Ubuntu Desktop. How do I redirect the FTP if it will be accessed by the Ubuntu Desktop's IP (192.168.8.11:21)? (see the Network Topology)
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3answers
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Forward packet from loopback interface based on routing table

I have a problem in which I need to process some packets and send out to more than one interface/network. My solution is to send the packet to a loopback/dummy interface and based on the Linux routing ...
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60 views

Forward multicast and broadcast packets over subnets

I am trying to receive packets from the local network, including specifically broadcast and multicast on device B, which is connected to the local network though device A which is acting as a router ...
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How do I visit web service, via my vpn connection, running on the same VPS that hosts the vpn server, with no “external traffic”?

Target VPS: Ubuntu 20.0x LTS, 2 3.8Ghz core, 4GB Ram, 150GB SSD + 500 GB HDD. 1 public IP address, 500Mbps bandwith. What I hope to accomplish: I have a VPS, on which runs both an apache2 web service ...
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1answer
51 views

Forward incoming connection to another server, but forward the connection IP address as well

I have two Linux servers. I need to forward the incoming connection from server A (1.1.1.1:25565) to server B (2.2.2.2:25598) (as an example). I've tried multiple iptables rules, with partial success. ...
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1answer
154 views

Redirection thru redsocks connecting but not responding

Am using redsocks to redirect thru a proxy. The problem is that when i use a tool like wget it appears to be connecting but not resolving. What could be the problem and how could i solve it? Executing ...
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How to use iptables to link two vlans

I have two networks, one being the main, with a network card eth1 (found on an Ubuntu Server 18.04 configured to be a router) and internal IP address 192.168.5.1 (with is the gateway) and another ...
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1answer
75 views

Exchange admin center forward and prepend body

I want to forward all incoming E-mails to my HubSpot CRM System. To achieve this I want to configure my Exchange Server to forward them. Exchange Server seems to provide only a redirect rule and no ...
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0answers
157 views

Troubleshooting low TCP transfer rate behind a router

I’m trying to debug a low tcp transfer rate on a host (“lowHost”). As a reference, i’m comparing it against a second host (“highHost”). I’m making two rate measurements: Downloading a big file using ...
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Access to internet from inside docker container

I have a problem with docker and conncting from inside the container to external network (e.g. ping to google.com) I have set up a new host (Ubuntu 18.04) and installed docker. I have created my first ...
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1answer
265 views

FreeBSD jail routing issue

I have the following setup with FreeBSD jails and VNET which is supposed to grow into a DNS core net lab setup. The jailhost and the jails are running FreeBSD 12.1. The jails are connected by epair ...
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2answers
72 views

How can I forward / redirect http to a public IP with nginx?

I have a domain example.com with DNS A record pointing to a public ip x.x.x.x. I need to get all http and https requets from that server and forward that traffic to another public ip y.y.y.y. Any ...
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bridge isn't forwarding non local traffic

I'm experiencing the following issue, i have two virtual machines connected and vlan tagged traffic is passed lets say from A to B. The traffic passed from A to B is tagged and I need to strip the ...
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1answer
21 views

SSH forwarding from my laptop to a VM located on a remote server

I have a remote server that hosts a VM that is running a web service on port 8000. I want to be able to access the web service from a web browser on my laptop knowing that: From my laptop, I can ...
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VPN Server Port forwarding

I got a VPN client 192.168.0.9 which is connected via a my home VPN server 192.168.0.12. (Most of my LAN clients are connected via 192.168.0.12 to use VPN). I'd like to port forward from WAN via my ...
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A way to forward all incoming mails to another adresss in Posfix/Zimbra

I'm looking for a way to forward all incoming mails to an external mail using postfix/zimbra, i tried "always bcc" but it forwards all mails including outgoing mails, but i'm looking for only incoming ...
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1answer
962 views

Port redirect for all interfaces with nft (nftables)

I have a relatively simple requirement that I want to solve with nft (nftables). It is to redirect all incoming packets from port 445 to port 1445. This should be done for all network interfaces. My ...
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2answers
61 views

How can I rward Mails with Postfix and Dovecot to a specific Mailbox?

I can’t figure out how to forward mail withhPostfix and Dovecot to a specific Mailbox. Sender Mail Address --> Mailbox of Receiver At moment the mails are transfered into the INBOX of specific Users....
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2answers
720 views

VPN via middle/jump server

Here's the rough picture of what I'm trying to do: client -> |VPN| -> server A -> |VPN| -> server B -> Internet. Server A and Server B are both on public internet with public IPs, also ...
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1answer
438 views

How to forward packets not destined for linux host to container

I am trying to do some traffic inspection on a lxc container in my host machine. My host machine is connected to a mirror port and being sent duplicate copies of the traffic of 4-5 other machines on ...
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1answer
374 views

Forward VPN traffic to another server

I have 2 servers: server A: Public IP --> 104.x.x.x server B: Public IP --> 188.x.x.x server A has 2 VPN servers: Openvpn --> tun0 Wireguard --> wg0 tun0: flags=4305<UP,POINTOPOINT,...
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1answer
45 views

Check forwarding queue occupation on router

I have a router forwarding traffic from a network to another and I need to know when the packet queue (in the receiving side/interface - rx) occupation is close to its maximum capacity. However, ...
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1answer
1k views

Mikrotik CAPsMAN Client to Client forwarding not working

I am trying to set Mikrotik CAPsMAN to allow wifi users communicate between each other On CAPs server I have allowed "Local forwarding" and "Client to Client forwarding", pushed configuration but ...
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1answer
447 views

Bridge filtering for man-in-the-middle network node

I am inserting my network node between 2 legacy devices that exchange tcp and udp messages using dedicated ports, in both directions. My new node needs to push some tcp/udp messages through ...
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1answer
2k views

Port Forward - KVM host forward port 23 to port 22 of a guest running an ssh service

I have a KVM server (host) with multiple virtual machines (guests). My goal is my host forward port 23 to port 22 of a guest running an ssh service. Command example... ssh root@[HOST_IP] -p 23 ...
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1answer
487 views

LocalForwarding on a SSH connection from my desktop client to a CHROOTED user in an LXD container

I currently have a proxified web host setup for local development, yet I'm trying to make it a proper (documented) setup so I can deploy it on practically any VPS hosting. Currently everything else ...
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1answer
206 views

How to setup SSH tunnel proxy server?

I've encountered multiple applications that don't support SSH tunneling, and that has become an issue when working off-site from our servers. I have a Raspberry Pi sitting here which is never turned ...
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2answers
322 views

How to create SSH tunnels

is it possible to achieve the following scenarios by using the SSH tunnels? My workstation --> jump server --> app server --> final resource (port 443) My workstation --> app server --> final ...
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0answers
36 views

Forwarding ports of a mobile hotspot to local server

I will start with thanking you for your kind answer. We are currently doing a project entitled "IoT based surveillance system". We are using Raspberry Pi 3B to stream the video feed on a local port, ...
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1answer
73 views

How can I allow ssh tunneling/forwarding trough a machine without giving access to the intermediate machine [duplicate]

Lets say i have a machine with a few virtual machines on them, how would i forward ssh connections to those virtual machines without giving access to the host machine? Is it possible to do so with ...

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