Routing (in IP-based networks) is the process of selecting paths in a network along which to send network traffic.

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Linux routing table entry disappears

I run Fedora 20 (3.13.10-200.fc20.i686) inside VirtualBox on a Windows 7 SP1 host. The Ethernet adapter on the guest is configured as a Bridged Adapter in VBox, and gets an IP via DHCP. Here's the ...
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How to use networks default gateway dynamically? [duplicate]

I want to use specific interface for specific use from different different application. I am using Ethernet, Wi-Fi and 3G modem interfaces in my embedded Linux set-up. Now my set-up is up with ...
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108 views

ICMP gives host an impossible redirect

I am having trouble with forwarding on a system which hosts a few headless VirtualBox VMs. I have not changed anything but the configuration has stopped working. The VMs have IP addresses on their own ...
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3answers
71 views

iptables rules - input and output

I'm new with Linux and iptables. I have a Ubuntu Server distro (12.04) on a PC which has 2 network interfaces (eth0 and eth1). I also have 2 laptops, one is plugged to eth0 and the other to eth1. ...
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139 views

Access local UPNP and port forwarding while using OpenVPN

I have a laptop with Arch Linux and NetworkManager. When I connect to any wireless network I establish client OpenVPN connection to PrivateInternetAccess (my VPN provider) for privacy. SSH and ...
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249 views

solaris netstat -rn output clarification

We have couple of servers performing the same function. On some I see following output: Routing Table: IPv4 Destination Gateway Flags Ref Use Interface ...
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1answer
37 views

How to route “single ip” to different interfaces [duplicate]

i have a dd-wrt router (ip 192.168.1.1) with the following network interfaces: eth0 ath0 ppp0 (a pptp vpn client) i would like to route all traffic from ip 192.168.1.10 to 192.168.1.20 through ...
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139 views

On ssh connection the auth.log shows as source IP the external IP of the server instead of the IP of the client

I have a very odd situation with my ssh connection. Every time I connect to my server, whatever is my external ip, the connection have as source the server's external ip. Example Server S.O.: ...
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77 views

DNS not resolving using IP rule for dialup modem

I am running Ubuntu 12.04. I have a HSDPA USB Modem, with which I can successfully dial in. It works fine as well when I set the default gateway (remote IP address) in the main routing table. But I ...
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25 views

Routing Application through different network interfaces [duplicate]

I have two interfaces on a server, let's call them eth0 and eth1. The underlying server is running CentOS 6.5 I would like to be able for some application to use eht0 while some others use eth1. ...
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267 views

iptables Port Forwarding — no service with the port

I have setup a network as in the image below: Firewall (FW) running CentOS 6 has two physical interfaces with subinterfaces: eth0:2 — 10.100.1.78/25 eth0:3 — 10.100.1.79/25 eth3 — 192.168.0.21/24 ...
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591 views

Use iptable do redirect all the HTTP traffic to localhost

I use a Linux machine as WLAN Router with the help of hostapd and udhcpd. There's also an Apache web server installed on the same machine. Now I want to redirect all the traffic which comes through ...
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48 views

Ip connectivity with two interfcaes

I have two network interfaces in Linux machine , eth0 and eth1. IP is assigned to both interface from two different VLANs and default gateway to eth0. Now if interface eth0 is down I am unable to ...
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How to separate upload and download on two different internet providers? [on hold]

I have two different internet providers. Can I use one for upload and the other for download? In particular, can I send internet packets with one and receive internet packets with the other? How?