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6
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1answer
5k views

connect Open vSwitch switch to real network : iptables masquerade

I'm using Open vSwitch to create a switched network between virtualBox guest machines, and i want that the host OS (Ubuntu 12.04) join this network and to configure it as the gateway of this virtual ...
5
votes
2answers
10k views

How do I enable IP-forwarding in MacOS X?

What is the correct way to enable IP-forwarding in MacOS X? More specifically, what is the MacOS X command line quivalent of the following two Linux commands: echo 1 > /proc/sys/net/ipv4/...
5
votes
2answers
9k views

Pings from VPN network to VPN client work; pings into from VPN client to VPN network fail - why?

We are in the process of setting up an OpenVPN server for some servers running in a cloud. We are stumped with a connectivity problem whereby the hosts on the VPN server's LAN can ping te VPN client, ...
4
votes
1answer
2k views

Bind outgoing SOCKS-server traffic to a specific IP

At the office we get access to the web via a SOCKS server which is started with the command: ssh localhost -f -N -D *:8888. This server has 2 IPs (but only one network card): eth0 xx.yy.zz.1 eth0:1 ...
4
votes
2answers
15k views

How do I forward/NAT all traffic to one interface/IP to a remote IP?

I have one "server A" that has multiple IPs attached to it, like so: eth0:0 1.1.1.1 eth0:1 1.1.1.2 eth0:2 1.1.1.3 I have another "server B" that also has multiple IPs attached to it, like so: eth0:...
3
votes
3answers
5k views

Redirect IP Address to Domain Name

I am attempting to redirect the IP address of my domain to the domain name and am running into trouble. The IP address does not redirect to the domain name listed in the redirect statement below. ...
3
votes
2answers
522 views

Map IP to another IP

Assume the following scenario, if I have a local machine (A) the requests another machine (B) using B's internal IP without regard the ports. But A and B are not on the same network, however, B has a ...
3
votes
0answers
49 views

how to configuring secondary IP subnet that is directly routed to WMware ESXI main IP

I have a ESXI 5.1 which comes with a /29 Block IP (EX. 70.60.50.0/29) and the ESXi management address is frist usable addres 70.60.50.2, also i have a secondary /27 IP block (10.20.30.0/27) which is ...
3
votes
0answers
2k views

OSX Yosemite IP Forwarding not working

I coudn't manage to set up basic ip forwarding on OSX Yosemite 10.10.1 Mac-Mini. I use the exact same configuration on a OSX Mavericks 10.9.5 Mac-Mini, and it's working perfectly ? I set the sudo ...
2
votes
9answers
392 views

IP forwarding on Linux - anything important to make sure to do or know?

In moving a website with a dedicated IP from one server to another, to minimize downtime due to DNS propagation delays, there's the approach of using IP forwarding so that all traffic to the original ...
2
votes
2answers
4k views

Does IP forwarding on Linux act as a reverse proxy?

I have looked around and have seen many IP forwarding solutions that forward requests from an IP on one server to another IP on another server. (Basically, the forwarding of requests going to 123.45....
2
votes
2answers
437 views

Forwarding web traffic from one IP to another

We host a web site for a client that is not responding to our requests to change their "A" record for the site (they own the domain). We are migrating soon and we cannot wait for them, nor do we want ...
2
votes
1answer
11k views

Getting the client IP when passing through a reverse proxy

In my VPS I am hosting several websites. everyone living in its own Linux Container. For instance Site #1 -> 10.0.3.111 Site #2 -> 10.0.3.112 Site #3 -> 10.0.3.113 To know where to ...
2
votes
3answers
156 views

Firewall based equivalent to SSH tunnelling

I have a web server that connects to a 3rd party database server and is granted permission to do so via a firewall rule on the database server. When I'm developing locally on my laptop, I use an SSH ...
1
vote
1answer
2k views

net.ipv6.conf.all.forwarding = 1 is an unknown key

I have few system with ipv6 addresses. I want to forward request from one system to another. hence I kept the option net.ipv6.conf.all.forwarding = 1 in sysctl.conf but the request is not getting ...
1
vote
1answer
1k views

openvpn windows routes ip forwarding enabled but not working

I have setup an openvpn network, I have in my client windows two interfaces, one public with IP 1.2.3.4 and the openvpn interface, with ip 192.168.244.10 I am able to ping from windows to the server'...
1
vote
1answer
3k views

What is the ip-forwarding option in dhcpd.conf?

From O'Reilly's book "TCP/IP Network Administration": option ip-forwarding 0 | 1; Specifies if the client should do IP forwarding. 0 disables IP forwarding, and 1 enables it. The only IP ...
1
vote
2answers
3k views

Problem IP Forwarding is Dropping Rx Packets on Embedded Linux Network

I have a pc and two embedded linux based systems that I am trying to chain together through IP forwarding. They span two separate local networks. Both networks are wired. I can ping 10.10.10.6 from ...
1
vote
1answer
73 views

How can I add a static route via a remote server?

I have a remote (i.e., 3 hops away) hosted Linux VM, with some LXCs. Those LXCs have internal IPs 10.0.3.* The VM has IP forwarding enabled. From my Windows machine, I would like to ping the inner ...
1
vote
1answer
1k views

It is okay to set MASQUERADE at 2 network interfaces in a Linux server?

There is a Linux server with 3 network interfaces, eth0, eth1, eth2. IP forwarding has been turn on in this server. eth0 is connected to 10.0.1.0/24. Its IP is 10.0.1.1. eth1 is connected to 172.16....
1
vote
2answers
2k views

how to route external IP to internal without MASQUERADE

Ok, i'm still working on creating a dmz'd http server So now I have an ethernet tunnel using ssh -w 0:0 and I have interfaces on each end which can talk to each other: previous question So now I'...
1
vote
1answer
566 views

centos 6.3 kvm external ip forwarding to guests

I have a centos 6.3 server with kvm installed. The server has 4 external ips and one NIC. 176.9.xxx.xx1 176.9.xxx.xx2 176.9.xxx.xx3 176.9.xxx.xx4 I use the following configuration ifcfg-eth0 as ...
1
vote
1answer
297 views

pptpd server does not route internet traffic?

I have set up a pptpd server on my computer and clients can connect to it successfully. I have enabled ip_forwarding in /etc/sysctl.conf and added the following rule to my iptables to masquerade the ...
1
vote
2answers
669 views

Linux: Ip forwarding or bridge?

On a Ubuntu 8.04 I have two interfaces eth3 and eth4:avahi. eth3 is in my local network with 192.168.178.63. eth4:avahi has the ip 85.214.144.211. From this box I can ping 85.214.144.212 ...
1
vote
0answers
12 views

How to redirect a URL from hostapd without internet access?

I have configured my server with iptables rules in order to forward all traffic to a specific domain. Those are NAT rules and the redirection works fine as long as I have internet access. But when ...
1
vote
1answer
203 views

iptables forward ip to another ip

I've configured multiple IP Addresses on my Ubuntu ssh server. Now the server can be accessed by using any IP Address, from 192.168.0.51 to 192.168.0.99. Depending on which IP Address someone uses to ...
1
vote
1answer
52 views

Double IP forwarding not working

I have the following 2 debian servers in my scenario: The first one is my main openvpn server, it has 2 NICS active eth0 (172.25.156.146) and eth3 (172.26.16.1) - The second server has also 2 NICS ...
1
vote
0answers
147 views

Openstack instances, routing, packets not delivered for SPECIFIC services

I am taking over management of an existing openstack system at work and I have only a little prior experience with openstack. I have about 8 instances running and all of them appear to function ...
0
votes
4answers
710 views

ssh to local network behind a public IP (TCP forwarding)

I want to connect (using ssh) two remote computers in a local network using a unique public IP X.X.X.X. | HOST_A---------| 172.1.1.2 | _____________ |------...
0
votes
2answers
184 views

do i need IPTABLES to enable IP FORWARDING?

To simplify, let's say I got a network with 3 servers (all runnning centos 6.4) in a row: Internet---FW---LN---PN FW: firewall LN: login node PN: processing node i can ping from the FW to the ...
0
votes
1answer
83 views

IPTABLES Forwarding issue

Ok, so I am terrible with iptables so I need some help. Here is what I am trying to do. I have a lan box on vlan 4 (172.16.9.65) I have another box on vlan 9 (10.1.0.1) My gateway for my 172.16.9.65 ...
0
votes
2answers
987 views

Proxmox - Live migration between different subnets

I have a proxmox cluster, that is distributed over two different subnets having two different gateways. In the first subnet VMs get an publicly available static IP address by MAC address mapping. ...
0
votes
1answer
81 views

How to prevent linux from dropping incoming packets that have a wrong mac address (promiscuous doesn't work)

I configured three machines in a static proxy_arp like manner: ----------------------+ +-----------------------------------------------+ +---------------------- Machine A | | ...
0
votes
1answer
73 views

IP Forwarding Issue

This is my first post, so thanks in advance for y'all's help. I'll try to keep the background succinct and relevant. I am running a server on centOS 4.6 for network client testing. I have the local ...
0
votes
1answer
220 views

IP routing Solaris 9 access the internet from local network

I am trying to configure the NICS on the Solaris Sparc server. My problem lies in getting out to the "Internet" from the local network. I have requested the NIC to receive a DHCP server address #...
0
votes
1answer
40 views

routing behaviour (PAT/NAT)

|(eth0: 84.23.13.43) +--------------+ | | | NAT router | | | ...
0
votes
1answer
7k views

Linux bridge (brctl) dosnt forward IP packet when router is one of the bridge endpoints

I have setup a brctl bridge on Ubuntu with the following deployment: Cisco router -> Linux bridge -> client computer The bridge forward the following packets types: ARP,STP, but doesn't ...
0
votes
1answer
239 views

Host forwarding fails, server is up, domain name tests ambiguous

I have a domain name registered with http://www.registryrocket.com/ The "main" site, which is called rudolfcode.net, is registered under godaddy, and forwards to a heroku site (rudolfcode.herokuapp....
0
votes
1answer
386 views

Server with 3 public IP and iptables

I have a linux box with two NIC cards: eth0 and eth1. In one card i have 3 public IP: eth0 = 10.10.10.1 eth0:1= 10.10.10.2 eth0:2= 10.10.10.3 In the other card I have one local IP eth1 = 192....
0
votes
1answer
2k views

Setup a local bridged connection using VirtualBox

I'm trying to forward/masquarade some trafic from my guest CentOS6 (virtualbox with bridged connection). Host is OSX Lion. Here is my network layout: en1 - host iface address: 78.251.xx.yy ...
0
votes
1answer
379 views

Activate ipforwarding on Windows Server 2k8 only for specific network adapter?

Is it somehow possible to activate ip forwarding only for one specific network adapter? Do I need to activate it for all of them and then somehow controll it with firewall rules or is there another (...
0
votes
2answers
2k views

Varnish configuration, NamevirtualHosts, and IP Forwarding

I currently have a bunch of NameVirtualHost based websites, load balanced between 3 apache2 servers using ldirectord. I would like to insert varnish as a reverse-web-proxy between ldirectord and ...
0
votes
0answers
32 views

OpenVPN connect to OpenVPN client network

OpenVPN Server Ubuntu 14.04 In Digital Ocean (Public and Private interface) OpenVPN client Ubuntu 14.04 I can't SSH from Server to client via VPN connection. Ping works fine. Tunnel is up. Followed ...
0
votes
0answers
26 views

Naked Domain Forwarding Broken on Godaddy with Period Slash

Is Godaddy naked domain forwarding broken when you have a ./ in the URL? I use GoDaddy for DNS and have naked domain forwarding setup. I have my A record @ set to GoDaddy servers, and use their ...
0
votes
0answers
46 views

NATted host cannot talk to itself unless virbr0 is in promiscuous mode

We have the following situation: A hypervisor using KVM-Qemu/libvirt with a single VM. The VM has the internal IP 192.168.122.151 on the default network pool using virbr0 on the hypervisor. We've ...
0
votes
3answers
114 views

Forward packet to another host in the same network

I have 3 hosts in the same subnet, each host has one network interface: A: 192.168.0.1/24 B: 192.168.0.2/24 C: 192.168.0.3/24 On host A, I just ping host B once. This should generate a packet (A->B)...
0
votes
0answers
18 views

Forward request with Apache Server

My current scenario is as follow: I have an Apache server that is being run on Windows Server 2008 R2 in the DMZ that listens on port 80 for incoming connections, IP is 155.15.22.90. I then have an ...
0
votes
1answer
226 views

redirect IP on osx

On my Mac OS X (10.6.8) I'd like to make all requests for 111.111.111.111 go to 222.222.222.222 for all ports. To test this, I have a webserver at 222.222.222.222:80 which will respond with a page for ...
0
votes
1answer
117 views

route output traffic from specific NAT'ed VM via ip alias

In a dedicated server with several containers behind NAT, I'm trying to route the output / outbound traffic from one of the containers through a specific virtual interface attached to the main ...
0
votes
1answer
59 views

Master and slave devices talking to each other through another device with two interfaces. All in the same network

I have three devices, one is a master which will talk with the slave and Device3 but it is only physically connected to the Device3. The slave will speak only with the master(also through the Device3)....