Questions tagged [forwarding]

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53 views

How to force ssh agent forwarding to continue in screen after you disconnect?

I want to connect to a host from which I will run ansible playbook using screen. Using screen allows me to have the playbook finish in case my ssh connection gets interrupted or terminated. So far no ...
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1answer
410 views

trouble setting proper forwarding rules in `iptables` with custom ip address for network sharing

I am having issues setting up a bridge for my raspberry pi. My setup is: I have a laptop running fedora 27 workstation which is connected to the internet over wifi. I have a Raspberry Pi Zero W ...
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2answers
2k views

Port forwarding using VPN client

I've already looked here and believe this is on the right track, though I still can't get it to work: Port forward to VPN Client? I have a vps, and on that vps I'm using openVPN. I have a connection ...
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1answer
660 views

iptables inside bridge

if i have: eth0 (no address) wlan0 (no address, providing wifi-hotspot by 'hostapd') br0 (local IP, bridging eth0+wlan0) eth1 (public IP, providing internet to above by net.ipv4.ip_forward=1) ...
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1answer
3k views

How to redirect all request to specific ip address in ubuntu

How to redirect all request to specific ip address in linux I have tried following command but its not working sudo iptables -t nat -A PREROUTING -d 0/0 -p tcp --dport 80 -j DNAT --to-destination ...
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1answer
50 views

Again about routing

Have a problem with primitive routing. Have a CentOs with 3 NICs (1 external). I want to confgure forwarding between two internal. Config: eth0 - 192.168.1.105 \ 24 eth1 - 10.10.10.1 \ 25 eth2 - 10....
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1answer
232 views

iptables routing

I believe this question has been answered a 100 times before, but I'm almost sure that I'm searching into the wrong direction. My desired setup is the following: I have a virtual host using KVM and ...
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1answer
248 views

Blanket blocking SMTP with whitelist

So using a VPS environment, whereby we need to block outbound SMTP by default (spammers), with the ability to unblock when needed. We have found some scripts eg: iptables -I FORWARD 1 -d $VPS_IP -p ...
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2answers
2k views

iptables forwarding between subnets

I want to forward traffic between two subnets, I'm not very familiar with iptables. The forwarding works except when iptables is enabled. There must be something wrong with the rules, though ...
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1answer
3k views

Server inbound email forwarding

I have been struggling to get this to work for a little while now so I have come in the hope of getting a wee bit of help. I am running redhat 6.3, and using the machine as a webserver. My question ...
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1answer
30 views

Traffic Forwarding To Server With iptables

I have a server (10.10.0.100) on the same subnet (10.10.0.0/24) with all the rest of the hosts. I would like that server to received a full copy of all traffic (Windows and Linux machines) on it's ...
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0answers
38 views

Can't use ip forwarding on Android unless hotspot is on

Really stuck on this one I want to change the gateway on my pc to go through my phone connected to the same wifi network in my home. When hotspot is on and I connect to it with another device it works ...
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0answers
37 views

Forward traffic to other interface

I have two interfaces eth0 and eth1. I want all traffic on eth0 to be forwarded to eth1 without changing anything to packet(origin Src/Dst IP, port etc. has to same). I found some articles about ...
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0answers
13 views

Information on forwarding queue occupation (if existent)

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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0answers
258 views

Purpose of UFW Allow All Rules in FORWARD chain?

What's the purpose of the allow all rules put into the FORWARD chain by UFW? They're currently messing up the 5 ACCEPT rules I've put in place underneath. Unless there's some specific valid reason ...
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1answer
544 views

Problem with gateway server configuration on Centos 7

I'm trying to configure a host with Centos 7 and one network interface (eth0) to be a gateway. The problem is that Gateway can forward package, receive the answer but it fails with sending response ...
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0answers
109 views

CentOS packet capture device

I want to build a packet capture device for my home network (testing purposes). I have a spare computer with one NIC. I have CentOS. I've used TCPDump before so I plan on using that for now to see ...
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1answer
1k views

lxc container <-> external internet, what I missed?

I have Ethernet on my machine (enp0s10) that connected to real network, and I have lxcbr0 Ethernet bridge which gather lxc containers. And I want to make available one of lxc containers. So I wrote: ...
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0answers
178 views

How to preserve mime type in CUPS forwarding?

I installed a small CUPS printer which accepts only application/postscript and converts this into a bitmap. Using a generic postscript printer driver I can directly print to this device without ...
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0answers
987 views

openvpn: iptables not forwarding

I have the following topology: And I'm following the iptables rules listed on https://community.openvpn.net/openvpn/wiki/BridgingAndRouting Here's the output of iptables -L -v Chain INPUT (policy ...
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0answers
299 views

IP packet forwarding in Debian

I have a physical network set up with machines A←–→B←–→C.  IP and Ethernet configurations are summarized as following: A(eth0: 10.10.10.2) ←—→ (eth0: 10.10.10.3)B(eth1: 192.168.0.3) ←—→ (eth1: 192....
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openbsd: mpls provider doesn't forward packets

Can anybody help me with next question: I am trying to get mpls test network up like in http://lteo.net/blog/2013/09/03/a-small-mpls-test-network-built-with-openbsd/ or http://2011.eurobsdcon.org/...
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1answer
2k views

VPS: How to forward traffic to devices from public IP

My goal is to set up a public IP for a Android Smartphone which is running an "IP Cam" software. The interface can be accessed in local network on (example) 192.168.0.2:8080, but it has no public IP, ...
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0answers
730 views

How to access Transmission runing behind a NAT from external PC

I have two PCs at two different places. Ons is behind a firewall I cannot (place X) control and the other is at my home. Transmission has a way of adding/ removing torrents using a web interface. ...
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0answers
425 views

Forwarding traffic through an OpenVPN tunnel

I'm attempting to set up a Raspberry Pi (192.168.1.118) in such a way that it allows all traffic that uses it as the default gateway to be pushed through an external OpenVPN tunnel (Private Internet ...
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1answer
3k views

How to forward IP traffic between wlan0 and eth0 without killing network performance on the forwarding machine

I have a laptop running Debian 7 that connects to my building's Wifi. I want so share this network connection via the laptop's Ethernet port. I have setup a script below to do this based on some ...
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1answer
35 views

What does * mean in ssh reverse forward?

What does * mean in the below ssh command? ssh -R *:1993:localhost:22 root@23.105.207.175 The * means 23.105.207.175? And are there different meanings for the below three expressions? expression1: ...
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1answer
593 views

Best Graphics over X11 Forwarding

I am currently using Exceed to handle individual X windows being displayed back to my Windows machine and this works flawlessly. I'm using Windows as my Window manager, but I have also experimented ...
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1answer
235 views

How to configure IP Forwarding

I have a device DEV1 which should communicate with device DEV3, however in the middle there is DEV2. My understanding is that I need to use IP Forwarding in DEV2 and edit route tables on DEV1 and ...
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1answer
17 views

Linux disconnect two subnetworks

I have one router with 3 networkcards (one goes global and two are intern) and I would like to know if i enabled in the router nat.ipv4.ip_forward = 1 so does a host on subnet 1 cann reach a host on ...
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1answer
67 views

Pinging one interface of Linux router by another interface of this router

I have such a topology made of network namespaces and veth pairs: ------ ------ ------ | a1 | | r1 | ...
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1answer
46 views

Can't access SNMP stack on rasp pi through router from WAN

Background I am running the following On my laptop the very latest version of arch linux with all the latest updates. It is from this laptop that I am querying an SNMP stack on a rasp pi $ uname -...
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2answers
814 views

Iptables remote PC as gateway (all traffic forwarding)

Here is a problem: I have complete ssh access to two machines on the local intranet. On machine two quick and reliable internet access. I want to forward all outgoing traffic from machine PC1 via PC2 ...
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10 views

Forward traffic Server A to Server B and show ip origin B to A

i have a question... Mi main server with this ip -> 166.xx.xx.xx Mi proxy server with this ip -> 66.xx.xx.xx When players connecting via main server i can see the ip from them, but when they ...
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1answer
23 views

Routing Configuration In Redhat Linux To Communicate Two Different Network

I have created three RedHat virtual machines named: server, client1, client2 in VirtualBox manager. server is connected to client1 on network 10.1.1.x with NIC card (internal network = inet1) and ...
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31 views

Linux iptables allow forwarding from a specific IP

I'am not new in iptables and Linux but I prefer your support before take a decision. I have a quite hard scenario in which the Linux "router" got many interfaces, routes, a VPN. GOAL: Allow a single ...
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47 views

Reroute traffic from PPTP interface to Wireguard interface

I would like to set up Wireguard client on my router. However, I'm a Mikrotik fan and the router doesn't support Wireguard. I'm planning to set up Wireguard client on a Linux, connect Mikrotik to ...
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35 views

iptables Data packets not forwarded, everytime after power cut

I am getting data from a remote RTU (192.168.100.2) to my server through L2TP on peer ip (168.18.13.3) over public ip defined on eth0. I configured eth1 with 168.18.13.1 And this is connected to ...
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1answer
93 views

IPTables Forwarding and MASQ not working

I am trying to setup Traffic forwarding and NAT for my VM machines.I am having setup in which there are 2 linux OS i.e. Ubuntu and CENTOS and I want that traffic should be forwarded from Ubuntu to ...
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11 views

Webserver Request Forwarding

This is a bit of a complicated request. The short of it is, I want to access a website that is generally public, while I am behind a firewall that blocks it. NOTE: the traffic will be almost ...
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1answer
19 views

Issues in getting internet from another node through Ethernet

I am trying to get internet on node1 [IP: 1.2.3.4] from another node2 [IP: 5.6.7.8] which has a working internet connection, through ethernet. Packet forwarding is enabled on the node2 which is ...
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24 views

Proxy git user's SSH login to internal GitLab CE container

I have a metal box with Ubuntu and I have set up GitLab CE inside a Docker container (whose IP address is only accessible within the docker0 network), so there's only one public IP for the whole ...
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1answer
22 views

several instances of bind serving same domain

I am trying to configure two DNS-servers (bind) on 2 linux-servers (server1 and server 2) acting as master for the same domain. server1 is intended as primary server and can resolve a subset of all ...
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1answer
36 views

Why would my router reject forwarded packets to itself?

The first rule in the FORWARD chain is interesting to me. Why would this be a necessary rule if the policy is to DROP? root@tomato:/tmp/home/root# iptables -L --line-numbers Chain INPUT (policy DROP) ...
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1answer
29 views

SSH Tunneling, have some problems [closed]

I have a computer and host A, B. Host A has internet connection and host B placed in host's A local network. Host B has Web Interface at port 8080. I need to forward port on host A. And then i want to ...
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57 views

VOIP worked with Mint 19.1 & kernel 4.4, fails w/ kernel 4.8

With Linux Mint 19.1, kernel 4.15, I connect to the Internet using WiFi, and want to share the Ethernet connection with a Grandstream IP Phone. I have done: click | network connection | wired ...
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54 views

Linux iptables forwarding

I've 3 machines : 1 server with LAN card without internet direct access 1 Windows host with WiFi connection for Internet and 1 LAN port 1 linux virtual machine on the Windows host [...
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0answers
136 views

WSL: Redirect links to host

As Windows is missing a nice twitter client I'm using WSL, with X11 forwarding to get Corebird running on my Windows 10 host. The question is: Is it possible to redirect the click on a link within ...
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0answers
818 views

IPv6 forwarding doesn't work

I have three Virtual Machines: A, B, C. Machine A and Machine C connected to each other through the B. Their config: A's IP: 2000::ffff:50a:b0b/120 C's IP: 2000::ffff:50a:d0d/120 Machine B has ...
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63 views

how to to bridge two networks and packet alteration

I am trying to bridge two networks (i.e. 20.20.10.0/24 and 20.20.20.0/24). I have a machine (Ubuntu 16.04) connected to both networks and my ultimate goal is this machine to act as a bridge between ...