The routing tag has no wiki summary.
12
votes
3answers
762 views
Can I limit a user (and their apps) to one network interface?
As the title really. I've actually got two scenarios to apply this:
Multiseat Desktop: two network connections both with internet gateways and two accounts doing bandwidth-intensive tasks on each. I ...
9
votes
2answers
4k views
Reply on same interface as incoming?
I have a system with two interfaces. Both interfaces are connected to the internet. One of them is set as the default route; a side effect of this is that if a packet comes in on the non-default-route ...
9
votes
2answers
4k views
iptables --set-mark - Route diferent ports through different interfaces
Short story,
3 interfaces, eth0 (LAN), eth1(ADSL), eth2(4G).
eth0 -> eth1: Works
(ports 80, 443, 4070) eth0 -> eth2: Doesn't happen
This is a graphical representation of the idea:
Port 80 & ...
7
votes
1answer
844 views
Dual network connection
I have a usb cellular modem and a Home LAN connection on my Ubuntu 10.10 box.
Both work independently.
I want to know how to have both connected at the same time, and be able to specify which ...
6
votes
2answers
2k views
How to refuse routes that are PUSHed by OpenVPN server?
When I establish an OpenVPN client connection over the Internet to our corporate OpenVPN server, it pushes several static routes. Unfortunately, these routes break some connectivity within my local ...
6
votes
2answers
314 views
1:1 NAT with several identical LANs
I want to connect several LANs located on remote buildings.
The "central" site have a Linux computer running OpenVPN. Each remote site also run OpenVPN.
the central site has a LAN numbered ...
6
votes
2answers
5k views
Output traffic on different interfaces based on destination port
My question is basically the same as Only allow certain outbound traffic on certain interfaces.
I have two interfaces eth1 (10.0.0.2) and wlan0 (192.168.0.2).
My default route is for eth1.
Let's say ...
6
votes
2answers
783 views
linux multiple internet connections load balancing with fail handling
I have two ISP connections and need automatic load balancing between them. I also need to handle failed connections (not use one that does not work).
First link is a PPTP connection (ppp0), second is ...
5
votes
2answers
299 views
Route and “e” flag
k# route -6
Destination Next Hop Flag Met Ref Use If
::/0 fe80::8001 UGDAe 1024 0 0 eth0
[...]
What does flag "e" mean?
5
votes
1answer
5k views
Use ssh with a specific network interface
I'm using openconnect to connect to vpn. After entering my credentials, I get this:
POST https://domain.name/...
Got CONNECT response: HTTP/1.1 200 OK
CSTP connected. DPD 30, Keepalive 30
Connected ...
5
votes
2answers
350 views
Change linux remote host *primary* IP address without losing control
I was wondering about how one could change a remote host primary IP address without getting disconnected at all (without being in a "no IP addr" state).
The matter is poorly discussed on Internet ...
5
votes
3answers
249 views
How can I disable automatic IPv6 neighbor route advertisement on a router?
I work for an ISP that's in the process of making its infrastructure IPv6-ready. Our core routers already have a working setup, but a large portion of our fiber customers are behind a router running ...
4
votes
3answers
2k views
How to find out which interface am I using for connecting to the internet?
I have eth0 and wlan0 according to ifconfig and I can ping google.com. How can I find out (with a normal user, not root) what interface is active, as in, what interface did the ping (or whatever, ping ...
4
votes
2answers
190 views
Why can I reach a different interface's IP address?
I'm wondering about this, and I can't seem to find an explanation on the internet.
I have a linux gateway which has multiple interfaces:
eth0: external ip
eth1: 172.16.1.1/24
eth2: 172.16.2.1/24
...
4
votes
1answer
1k views
Using the Wifi of a notebook via ethernet for another PC
I want to connect a PC to the internet via my notebook, which is connected to a WLAN.
The setup should look like the following scheme:
PC (eth0) -> Notebook (eth0) -> Notebook(wlan0) -> ...
4
votes
2answers
781 views
How to build a gateway from my Linux OS
I want to configure my Linux so that it will be used as a network router (gateway). Can anybody give me some hints on this? (links are welcome!)
Thanks.
4
votes
5answers
6k views
How to route specific adresses through a tunnel?
There are certain websites/services which I can only access from the subnet on which my server is located (think of the typical intranet scenario). Is there a way to transparently route traffic that ...
4
votes
1answer
364 views
What is the routing behaviour when two or more default routes?
I have two ISP at the time, connected to the same machine. I added both of them in the routing table as default. However, only one connection is used.
$ route
Kernel IP routing table
Destination ...
4
votes
3answers
612 views
Redirect traffic through vpn on an as needed basis
My problem is really simple yet it sounds complex, but I have zero to none experience with this.
I have set up a box using gentoo which has its own semi-static WAN-IP and acts as router for my LAN. I ...
4
votes
1answer
274 views
Throughput test setup with two local Ethernet interfaces
I'm currently testing the routing performance of a hardware device (DUT - Device Under Test) with the following setup (all addresses start with 192.168.):
eth0 (29.2) <---> eth1 (29.1) eth2 ...
4
votes
1answer
840 views
multigateway routing for specific src port
I have two gateway to access internet, somehow I want to load balancing it, so far its working, but some connection or service need persistent gateway IP to be used, so the client should never change ...
4
votes
2answers
140 views
Routing for multiple uplinks/providers
I have a PC with two internet connections. The first one is an Ethernet interface to connect to my local network and access internet via my router. The second one use a GSM modem to connect with ppp.
...
3
votes
3answers
1k views
Using bridge utils to connect two computers via Linux
I have been using bridge utils previously to connect my network connected computers to a single interface on my Linux computer. The problem I'm having is when I installed a new Linux (with Slackware) ...
3
votes
4answers
1k views
Sniffing packets through router
I would like to create a system like this.
The user would connect through a wifi network which would reroute all http requests and responses through the network card on a computer thus allowing that ...
3
votes
2answers
4k views
Linux Networking routing to virtual ip addresses from a different subnet
New to linux networking, had a question about routing to virtual ip addresses from a different subnet.
I have three servers (they can all ping each other):
A 10.10.51.182 (connected to router ...
3
votes
2answers
321 views
Block specific IP from accessing gateway
Suppose you are on linux internet gateway/router. What would you do to block a client with specific IP using bash script. I prefer something like ./block_client.sh 192.168.1.123 to block and ...
3
votes
2answers
94 views
Use eth interface to connect to a router and wlan for the internet
I am currently trying to configure a router to which I connect to (to its web interface) using an Ethernet cable through the eth0 interface. That router doesn't have access to the internet.
Now, I ...
3
votes
2answers
197 views
Network interface preference
How does Linux determine which network interface to use, when both are connected to the same network?
Note that this isn't a question on routing. I'm familiar with how that works. This is if, say, I ...
3
votes
1answer
2k views
Is route add … the best way of directing traffic through a vpn
I have set up a VPN on a remote ubuntu machine using pptp-linux and the instructions found here.
After set up no traffic seemed to be going through the VPN and the VPN network devices were not ...
3
votes
1answer
307 views
Share Internet Connection from computer to new router
On my linux computer I have an external wlan adapter which is connected wirelessly to internet (an access point).
Now I want to connect my linux computer via ethernet cable to a new ddwrt router. This ...
3
votes
1answer
291 views
Routing through iptables
I have this vpn client that touches the routing table and then keeps watching it to exit if it gets touched.
It is the kind of setup needed for an endpoint, such as a laptop.
I want to use a small ...
3
votes
2answers
515 views
Need help with routing
I have set up a Ubuntu server, that I want to use as a router for my local office.
The problem is, that I want to make 2 VPN connections, to remote branches, and then I want to route all traffic to ...
3
votes
1answer
298 views
Routing Tables: What is the effect of the RTF_IFSCOPE flag?
(Related to this question I posted a while ago on apple.stackexchange.)
What is the difference between the following two routing table entries:
default E.F.G.H UGSc 0 ...
3
votes
1answer
76 views
Alternative to mrouted for DVMRP on Debian Squeeze
I need to implement DVMRP protocol to route multicast over Openvpn (tun) connection for some old 3Com NBX phones.
I use Debian squeeze so mrouted is not available (obsolete).
What can I use ...
3
votes
1answer
138 views
Using source routing (LSRR) - any ideas?
What I want to do is conceptually very simple, but I can't find any information or help about how to go about doing this.
Basically, I want to configure my networking to use source routing (LSRR). ...
3
votes
0answers
130 views
Traffic getting routed through Apache
for some reason, certain outgoing traffic on my server gets routed to the apache webserver i am running. this problem just started happening. i have the webserver set up to use vhosts, the webserver ...
3
votes
1answer
1k views
How do I configure OpenVPN as a Gateway client for Witopia?
I have the following setup:
Witopia SSL account
Synology 409 NAS (with OpenVPN and Apache etc)
PS3
Mac
Apple AirPort router (configured for NAT)
Locked IPT-box (using DHCP and NAT traversing)
-
...
3
votes
1answer
111 views
Looking for elegant iproute2 solution for host w/ 2 interfaces on 2 networks and 3 gateways
I've got a Linux webserver with 192.168.0.2/24 assigned to eth0 and 172.16.0.2/24 assigned to eth1. I must not change this. Here's the routing so far:
172.16.0.0/24 dev eth1 proto kernel scope link ...
2
votes
2answers
1k views
What is kernel ip forwarding?
I have seen on many blogs, using this command to enable IP forwarding while using many network security/sniffing tools on linux
echo 1 > /proc/sys/net/ipv4/ip_forward
Can anyone explain me in ...
2
votes
4answers
1k views
How to remove all default gateways
I'm commanding a customarily built linux machine so not all linux commands are available. I execute network related commands so I need to set a default gateway right before I run my command, then ...
2
votes
2answers
922 views
How is the loopback network interface implemented?
The loopback network interface "is a virtual network device implemented entirely in software," according to another question on Unix.SE.
But how is this implementation actually accomplished, and how ...
2
votes
3answers
66 views
Detect which interface traffic to an IP address goes through
I'm making an script, and I need to detect in what interface is the traffic of an IP going through. This is because in the arch, an IP address is attended only for one of four NIC's, but can be any of ...
2
votes
4answers
1k views
How do I route web requests into my private network depending on the domain in the url?
Scenario:
Due to limited number of IPs, several domains are resolved into the same IP address. However, these domains may not all run on the same webserver, VM, or even dedicated machine. Therefore, ...
2
votes
1answer
65 views
How do I route traffic through specific interface for a specific process
I have a script that runs from cron every 15 minutes. The script is meant to ping my DNS server to update a dynamically changing IP. I want this script to ping through the wlan interface and not the ...
2
votes
1answer
95 views
Linux nat/iptables configuration for a chain of peer-to-peer links
I have an experimental setup, of 4 Linux (CentOS) machines:
All 4 machines are internally connected using different networks and can ping eachother directly connected interfaces. However only PC4 ...
2
votes
1answer
61 views
Make a linux network device a router
I am developing an IPv6 network device driver. It should behaviors like a router, i.e. send router advertisement regularly. But now my device is working like a node, send router solicitation. What ...
2
votes
1answer
143 views
PPTP server with NIC aliases
I have set up a VPN on a VPS Server using PPTP. I have one NIC with two aliases.
eth0
eth0:1
eth0:2
The 3 interfaces have public addresses. eth0 is a French IP, eth0:1 is UK, and eth0:2 is ...
2
votes
2answers
504 views
Xen, bridge and multiple IPs on CentOS
There's a new server that is assigned 5 IP addresses. I want to use Xen to run several VMs with various services.
This is my first attempt to install Xen, I use this tutorial as a guideline. Stuck ...
2
votes
1answer
338 views
Routing private network to internet via 2 gateways
I have the current set up for an embedded environment:
Embedded Target (192.168.0.200) -----> Virtual Machine (VMWare) (2 NIC's - 192.168.0.2 (Target Port) and 192.168.49.69 (NAT Port to host)) ...
2
votes
1answer
381 views
Multiple VPN connetions, routing based on country
I want to set up a couple of VPN connections to two different countries, A and B, on my Ubuntu Server. Then I would like to set up rules based on GeoIP to determine which VPN connection should be used ...
