Questions about using a router/networking, e.g. port forwarding, VPNs

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VPN across three VPS's

I have three servers running on virtual machines. The gateway is 192.168.0.1, and the hosts are the numbers 2,3 and 4. The first host is serving a PHP script which outputs the visitor IP ...
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1answer
59 views

Windows Routing Table

Consider following routing entries in windows route table: Address Mask Gateway Interface Metric: 0.0.0.0 0.0.0.0 10.0.43.1 10.0.43.6 10 127.0.0.1 ...
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1answer
51 views

How to route traffic originating from a specific interface?

On my OpenWRT router I have three interfaces, a WAN interface wan, a LAN interface eth0, and a OpenVPN interface tun0. I want to route all traffic originating from eth0 to a particular IP address ...
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1answer
676 views

Route traffic from one address to another on one interface and to everything else through another interface

I have a small embedded computer running busybox. It has a wired eth0 interface, which is connected to an on-board wlan-module's wired interface by a cable. Also there's an 3G module on ppp0. I need ...
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1answer
203 views

Default gateway is lost

A weird thing is happening here. I am using TPLINK WDR3600 as server, which is connected through Ethernet with a modem in bridge mode. I use 2 PCs and a cell phone on my LAN. Something is happening ...
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2answers
786 views

Route traffic through VPN to some IPs occasionally

I would like to route traffic to some specific addresses through VPN. Easy enough, one can simply add a route: ip route add <destination ip> dev tun0 scope link Here comes the catch: I do not ...
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7answers
6k views

IP address that is the equivalent of /dev/null

Is there an IP address that would result in any packet sent to be ignored (blackholed)? I know I can always set up a router with an IP address and then just have it ignore all packets sent to it, but ...
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4answers
110 views

Where did the routing table on my Windows PC come from?

When I connect to a LAN, I know a DCHP server will provide my PC's IP address and the default gateway (these will be part of the route table) and that loopback addresses are probably automatically ...
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104 views

Ping through GRE tunnel discarded between 2 interfaces of a router - Ping does not reach subnet

I have an interesting issue that I hope someone can help with. I am trying to create a GRE tunnel between 2 routers (running Linux Ubuntu 12.04) and pass traffic between 2 subnets trough this tunnel. ...
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1answer
55 views

routing table, ip address for outgoing packet

Network Destination Netmask Gateway Interface 0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.8 ...
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0answers
93 views

Simplest FreeBSD SSH (-w) VPN setup for RoadWarrior

I'm looking for the simplest FreeBSD specific example of configuring an OpenSSH VPN (using -w) that will route all traffic not destined for the clients local network over the VPN. An example scenario ...
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0answers
71 views

Adding an IP block into VMWare Esxi

I have a dedicated server with VMWare Exsi 5.5 installed and I have recently bought another /29 from my colo provider. They have set things up so that it works this way: Original: Network: 1.2.3.1 ...
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2answers
255 views

Why nic with incorrect subnet mask can still ping the gate way?

At first, my network config was like this: $ ip a 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 3c:97:0e:bd:b1:68 brd ff:ff:ff:ff:ff:ff ...
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1answer
39 views

Best way to route internet through remote comptuer

Alright, I'm not from the US and I pay for a VM running Windows Server 2012 in the USA. I have full access to that VM and I can install whatever I want on it. I want to be able to re-route my ...
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1answer
276 views

Traffic Route mismatch with two NIC Windows Server 2008

I have small issue on my network I have two NIC, NIC 1 Connected to the internet and local network, NIC 2 Connected to Sip Trunk Circuit (No Internet) Each one of them has different Gateway. My ...
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3answers
99 views

Two NICs work together

I got two NICs in my windows, one is Ethernet and the other one is wireless. Now I want the Two NICs to work together 1. Use wireless to access the Internet. -> (192.168.1.0/24) 2. Use Ethernet to ...
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1answer
138 views

From my 192.168 box, how do i find 10.0 virtual machine on the same box?

I am running Ubuntu 12.04 and Virtual Box 4.1.12. I have created a Debian server under Virtual Box. For reasons I don't understand, DHCP grants my Ubuntu box 192.168.20.50 and my Debian VirtualBox ...
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1answer
52 views

How to say windows not to use specific network connection for Internet traffic? [duplicate]

I have slow VPN connection to another computer, which is also connected to internet as my computer is. When this connection is active, all browsing traffic goes via remote computer, although it is ...
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2answers
2k views

Why can't I ping a network printer from a specific computer only on the same network?

I have a small home network with a few computers/tablets and a network-enabled printer, all connected through wifi. The problem is I cannot connect (ping) from one specific computer ("A", ...
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0answers
122 views

add routes on CentOS 6.3 with two subnets

Consider the following scenario and please help me to add static routes. I have recently purchased two servers. Each server has two nics and both the servers are connected using crossover LAN cable on ...
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1answer
147 views

On Linux, can I forward wlan0 to eth0, and wlan1 to eth1?

I have the following simple situation: two internet connections via two distinct ethernet NICs, eth0 and eth1, and two APs (I use hostapd, of course) on two distinct wireless cards, wlan0 and wlan1. ...
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1answer
90 views

Why can I only view certain devices if I am using the 192.168.2.1 gateway

I have a kind of weird problem. Every device we have at work printers, servers, etc. Exist on the 192.168.1.0 network. We have some remote devices that are an extension of our network and they ...
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3answers
53 views

PAT Internals. How is it de-multiplexed?

Question: Assuming PAT is enabled on my home internet router, how does my router know which hosts to de-multiplex packets to when it receives packets from the internet? Example: On my LAN there is 2 ...
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1answer
340 views

OpenVPN server on Virtualbox Guest. Can connect but fail to ping

As a development environment for my production server I have setup a Virtualbox guest. However I am failing to setup an OpenVPN Server. I can connect to my VPN without problems using (KDE ...
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1answer
20 views

why application proxies examine data in the packet?

in Packet Filtering as we know : every packet has header and data and we know thats : Packet filters examine only the header of the packet , because it contains IP source and destination addresses. ...
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0answers
38 views

Query an office gateway/router to confirm all routes?

Is it possible to send a 'query' of some sort to a gateway device in an office to see what subnets I have access to? For example, I know that I have access to multiple subnets because we have many ...
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1answer
235 views

How to route to public IP addresses from NAT where gateway is in subnet of target public ip addresses

I have the following scenario which is giving me fits. I have a block of IP addresses on a .248 subnet. The service is Comcast, and the modem uses IP addres ending in .246. On the router for my ...
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1answer
60 views

Can't get response from local server through wifi

I have a local server that hosts several websites. It's turned on into the router and has 192.168.1.2 as the internal IP. If I connect another computer to the same router with a cable, everything ...
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1answer
44 views

What can I do about my site being blocked by a particular server?

One of my websites is inaccessible via certain ISPs. I ran a trace route and I can see where it stops. Looks like it's owned by the ISP. Is there anything I can do about this? Can the hosting provider ...
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1answer
179 views

Ping IP returned “destination net unreachable”, even with different network [duplicate]

I couldn't log in to facebook, so I ping the domain and got this: ping www.facebook.com Pinging www.facebook.com [69.171.228.14] with 32 bytes of data: Request timed out. Reply from ...
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0answers
1k views

Cisco AnyConnect vpn stops internet connection in Windows 8

I have a VPN set up through Cisco AnyConnect 3.1.04072 on a Windows 8 laptop. I can connect to the vpn, but as soon as I do, all internet traffic stops. I've been researching for days now and I ...
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3answers
348 views

Route Internet from eth0 to openvpn to eth1

I need to route all traffic coming and going from/to eth0 through openVPN before I send/receive it to/from eth1, this is a virtual machine Debian, you can call it a virtual router. The idea is to put ...
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2answers
194 views

Router receives two routes from different routing protocols

A router receives two identical routes from different routing protocols. Which route is put into the routing table? I have been asked this question. A router can only have one protocol active ...
2
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2answers
443 views

Add specific route via start-up script

I need to setup route for one of my computers. I want it permanently so I don't need to enter the command myself every reboots. However the route command I use ain't a normal one, because I use 2 ...
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0answers
42 views

Port forwarding issues

I have a home web server that is behind a Linksys E1200 router and Verizon Westell modem. To access the web server from outside, I forwarded the data though both devices. The method is working for ...
2
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2answers
197 views

How to setup flexible routing between 2 LAN's at home

I have two separate internet connctions at home, one Huawei B593 4G router and one Netgear ADSL router. Normally I use the 4G connection (with the ADSL as a backup when I hit the 80GB data limit per ...
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1answer
55 views

Routing error to WINS name without .local

I'm having a weird issue on the network. all windows PCs behind the main router, XP, win 7 and win 8 are routing an adress incorrectly, to what looks like an external ip. The machine, a netgear ...
1
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1answer
153 views

Linux routing: connect to VPN but still make services (e.g. Apache) accessible via ISP-assigned ip

I have a pfSense firewall sitting directly behind my cable modem. On my lan, among other things, I have a linux (Mint 13) box running apache. I have a port forwarded from pfSense to my linux box and ...
2
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0answers
322 views

Share VPN connection and normal internet with mobile device over WIFI

I have a PC and Mac that I have running on a VPN for work. The VPN is only required for traffic to a sepecific set of servers (not all my internet traffic is routed over the VPN). The vpn is made (on ...
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0answers
111 views

Host not resolving, ping is

I have two network cards on my Mac OS X. One for my corporate, the other one is my wlan. For all internal stuff, the corporate one should be used. I configured following: route add -net 10.0.0.0/8 ...
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3answers
1k views

Multiple web servers behind one public IP

Long time reader first time poster (he he). So here's my dilemma. I'm hosting 3 sites at home for some friends, nothing big, all just wordpress sites. Running them in VMWare Workstation. Got a ton of ...
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0answers
25 views

Two default routes with Dynamic IP

I have second connection to the Internet added with a Dynamic IP(VPN). following this guide: http://www.rjsystems.nl/en/2100-adv-routing.php I'm stuck at a point where I need to add: ip route add ...
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0answers
94 views

how to proxy to a VPN connected server with local services running?

I'm having trouble accessing services that are running on my Linux Box from outside the local network. The setup is not as simple as most tutorials describe so I'm a bit stuck. My Linux Box (running ...
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1answer
840 views

Route LAN traffic through eth0, not tun0, on my VPN access point

How can I make my Access Point send traffic to 192.168.1.0 through eth0 and all other traffic through tun0? I have set up a Raspberry Pi VPN access point. It sits on the same subnet as all my ...
0
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1answer
1k views

How to forward packets between two interfaces?

My laptop (use's Ubuntu 13.10) is connected to internet using a wired connection at eth0 with ip 192.168.42.13 and it also acts as a wifi hotspot at wlan0 with the ip 192.168.1.1 (i used airbase-ng to ...
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0answers
94 views

Unable to ping IP on linux

I have a Linux box which is connected to one machine (say boxer). eth0 of linux box is directly connected to boxer. I have vlan range 500-550. Below is ifconfig details of linux, all o/g and i/c ...
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0answers
907 views

Windows 8.1 Hyper-V guests cannot access Internet

I've set up several Linux VMs using Windows 8.1 Pro's Hyper-V feature. This was working fine yesterday. Shortly after installing a new VM, I noticed that it could not access the Internet. This was ...
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0answers
120 views

ESXi connect to external management network from internal VM

My ESXi server has two vSwitches: One has a physical NIC attached which I labelled "external". The other has no NICs attached which I labelled "internal". My external network is in the subnet ...
1
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1answer
150 views

Connecting two private LANs - issue with VPN

I have a "home" LAN in the 192.168.1.x subnet, where my internet facing router which is also the gateway has the IP of 192.168.1.1. On top of that, I have a "lab" environment running on ESXi where I ...
0
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1answer
220 views

Debian based server picks wrong network as gateway

I'm configuring own server to act as router. It has three interfaces, two cable and wifi. Following this article to configure access point. After setting bridge i have problem with default gateway. ...