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0
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2answers
15 views

Is it possible to configure carp using /etc/network/interfaces?

Lots of tutorials out there show to set-up carp using ifconfig: https://www.netbsd.org/docs/guide/en/chap-carp.html I'm wondering if it's possible to do the same using /etc/network/interfaces? For ...
1
vote
1answer
397 views

How do bridges really work?

I'm in a major confusion here, regarding bridges. I thought that they were devices that allowed going from one network to a different one without routing (doing the work at layer 2 instead), but if ...
0
votes
1answer
295 views

Adding static IPs on a p1p1 interface in ubuntu 14.04

I'm wondering if anyone can give me a rundown for networking configurations in ubuntu when the interfaces are p1p1 etc. I have tried p1p1:0 (like eth0:0) for secondary IPs to no avail. If someone ...
2
votes
1answer
3k views

Routing OpenVPN tunnel in via public interface and out via NAT'd interface (to internet)

I hope someone can help... I want to Configure OpenVPN-AS (i.e. OpenVPN Access Server, NOT OpenVPN) to work on my VPS. The VPS is a KVM running Ubunto 10.04 LTS, with a very vanilla configuration. ...
0
votes
0answers
16 views

Can we add post commands with the salt network module?

I'd like to add post-up and post-down commands to my network interfaces. Can salt.states.network do that ? If not what would be the best way to add them using salt knowing that I can't simply add ...
-3
votes
1answer
103 views

ssh on eth0, everything else on eth1 [closed]

I wouldn't even consider myself an iptables novice user, so I was wondering if someone could please help me to do this: I want to be able to ssh into one of my servers using the eth0 network ...
8
votes
2answers
211 views

Packet captures: filtering on RX vs TX

I have a network problem where frames with a source MAC which matches with one of my host's source MACs are arriving at the host - an apparent duplicate MAC, or loop, or other L2 problem. I believe ...
1
vote
2answers
1k views

interfaces/static IP problem - Debian

I'm trying to configure my Debian machine (Lenny) to use a static ip address. Here's what my interfaces file currently looks like: # This file describes the network interfaces available on your ...
0
votes
2answers
1k views

Using multiple internet connections?

I have two connections at work. One that I use to get to the Internet and the other to the company related stuff. The problem is that when I want to connect to the work related stuff, I need to switch ...
0
votes
1answer
2k views

Multiple interface NAT routing

I have multiple internet connections from different ISPs and I need to route certain traffic over a particular ISP link. I am using Debian for this. The setup is as follows; eth0 (IP address is ...
0
votes
2answers
364 views

Windows to configure IIS Website to use a particular physical network interface

How to configure on Windows 2003 server such that:- when I access my website on the server, it uses IP address A.A.A.A when my program runs it uses IP address B.B.B.B Both A.A.A.A, B.B.B.B is ...
6
votes
5answers
2k views

Is there any way to force my Linux box to always boot up with a self-assigned IP address?

This is perhaps an unusual request: I'm trying to get a Debian Linux box to always give itself a self-assigned IP address (i.e. 169.254.x.y) on boot. In particular, I want it to do that even when ...
1
vote
1answer
797 views

Check packet vlan tag using Tap virtual interface

I am trying to learn how to implement virtual interfaces using the Tap driver. So far my understanding is that using the tap driver I can create a virtual interface and then have a userspace program ...
4
votes
3answers
32k views

What is a Cisco BVI interface? What is it used for?

I have been Google'd and searched for the answer to these questions, but I cannot find a simple answer. So my questions are about BVI interfaces. What are they? Why do you use them? In what scenario ...
0
votes
3answers
2k views

Ubuntu second static IP, ifconfig, /etc/network/interfaces

I would like to add a second static IP to my local Ubuntu 11.10 desktop machine and have it automatically available after rebooting. So far I am successfully using ifconfig to to temporarily set up an ...
1
vote
0answers
77 views

heartbeat doesn't work on virtual interface

I try to use vertual interface as broadcast for heartbeat(bcast in ha.cf). When I try it I see this message in syslog: May 23 12:17:26 Ubuntu2 heartbeat: [1107]: ERROR: glib: Error setting socket ...
1
vote
2answers
1k views

XenServer 6.2 changing mtu

So I've looked around for a way to change the MTU of interfaces on XenServer 6.2, but can't find anything that works for me ... One method spoke about changing the ifcnfg-intX files in the ...
2
votes
2answers
200 views

Consistent Naming of 10gbps Interfaces on Dell Host

I have some Dell hosts in our environment. I would like to be able to provide consistent network interface naming across platforms. I know that biosdevname attempts to make the interfaces consistent ...
1
vote
2answers
185 views

How to set ip address permanently

This might sound a little strange, but I try to achieve to set up an ip address permanently in Ubuntu using the command line, but not an editor. My idea is to provision servers and just type in the ...
0
votes
5answers
2k views

Can't see other network interface in Debian Etch

I know there are two physical network interfaces in our server (haven't seen it live, but person from datacenter confirmed two ethernet sockets). Problem is, I can only see one via ifconfig -a. At ...
0
votes
1answer
48 views

Tshark/wireshark on an ephemeral interface

Our server hosts a VPN. Each connection to the VPN creates a new PPP interface (ppp0, ppp1, etc.) and the connections are ephemeral in the sense that the interface can go up or down intermittently. ...
0
votes
0answers
146 views

interfaces stopped working

I have a cisco machine with centos 6.5 installed on it and all of a sudden my network interfaces stopped working. When trying to restart the network service with /etc/init.d/network restart I got the ...
0
votes
2answers
50 views

Multiple net interfaces ubuntu virualbox

I have a Virtual Box machine with 2 net adapters, first is an "internal net" and the second a "bridge adapter". How could I config both for have an static ip for the internal network and a dynamic ip ...
0
votes
1answer
44 views

If one subnet can see another does that mean that there is a bridge between two interfaces?

This might seem like kind of a dumb question, but...say for example... I have a router running OpenWRT or some Linux distro and that router or box has two interfaces (lets say for sake of example a ...
0
votes
1answer
118 views

Keep router interfaces isolated

Have a Cisco Router 2811 with a HWIC that gives it an extra port so I have 3 Ethernet ports. Have it configured like this: FA0/0- 192.168.1.1 FA0/1- 192.168.10.1 FA1/0- 10.0.0.1 (outside) All that ...
0
votes
1answer
54 views

Can I assign a virtual interface (VPN) to a 'real' interface / NIC of my choice?

I have a small server , running MINT linux with two NICS (eth0 and eth1) and I'd like to setup the MintBox as a VPN client to connect to a web-hosted VPN server. All works wonderfully on the VPN ...
0
votes
1answer
322 views

how to forward all traffic on specific interface to ip address

I have one Linux machine that have 2 interfaces. The first one is used as a default one and provides access to internet, the second interface was added as a dedicated link to send packets from tcpgen ...
0
votes
1answer
73 views

Configure IP addresses for virtual interfaces only

In my current CentOS ifconfig, I have eth0 and the range of virtual interfaces eth0:0 - eth0:3 each taking up a unique address in the subnet 69.xx.yy.194/29 (gateway = .193, broadcast = .199) Now I ...
1
vote
0answers
30 views

“Breadcrumbs” for series of hostnames?

Does anyone know of a shell that would show a series of breadcrumbs as I navigate into/out of various servers, like this: Home > Build Machine > Vagrant > Docker-base Hopefully it could ...
0
votes
2answers
112 views

Linux VM's connectivity dies when second network interface is brought up

I'm in the middle of doing some testing on a mobile device, and want to test it from the network. The mobile device will only connect to networks via WiFi, and doesn't support ad-hoc mode, so I've set ...
1
vote
1answer
182 views

SSH timeouts between hosts which are connected via multiple routes

I've a nasty problem with ssh connections between hosts, which are connected via multiple ways (routes). To explain this in detail ... As you can see, there are two possible ways between the hosts, ...
0
votes
1answer
690 views

what is the use of /etc/udev/rules.d/70-persistent-net.rules file in rhel?

what is the use of /etc/udev/rules.d/70-persistent-net.rules file in linux? is anyother way to change interface name in linux other than 70-persistent-net.rules? Thanks.
0
votes
1answer
413 views

ntop not reporting on all interfaces

I'm trying to setup ntop on our machine to see which traffic per IP address on our machine, our machines usually have a /28 allocation and this is configured correctly within CetnOS however ntop is ...
-2
votes
1answer
1k views

How can I ping through different interfaces (subnets) without using a router device?

I have a big problem around this issue. I want to be able to ping and access TFTP through my WIFI interface (wlan0) through my wired interface (eth0) pc1_eth->LTdhcps2_eth0->LTdhcps2_wlan0->pc2_wlan ...
1
vote
3answers
589 views

Bring up a virtual interface without checking if it's up elsewhere

Is there a way to bring up a virtual interface without it first sending an arping to check if that IP address is already in use elsewhere? I'm working with a proprietary product that recommends ...
0
votes
4answers
1k views

How to convert a local socks server into a local interface?

Exist a way to convert a local socks proxy into a local interface? My problem is that some application don't have the possibility to specify a socks proxy, and I need that all my communication pass ...
0
votes
1answer
41 views

Ping Interconnected PCs End-To-End

I have the following network topology: [PC 1] - - - [PC 2] - - - [PC 3] - - - [PC 4] Each machine is connected via a crossover cable. I can ping from PC 1 to PC 2, but how can I configure things so ...
12
votes
4answers
3k views

How to identify NICs that are connected to the same switch from a Linux box?

Initial Setup As a Linux administrator you have installed a fresh Linux box with 6 NICs eth0 to eth5. The eth0 interface is correctly configured and all other interfaces are currently up but without ...
0
votes
4answers
461 views

creating interface in linux

I have a tunnel with a third-party computer. This tunnel iface has the ip address of 10.244.248.126. The third-party just told me that there is an ACL that will allow only IPs from the range ...
1
vote
4answers
2k views

Cisco Switch: trigger mac-address table update

If I run show mac-address-table dynamic I get a bunch of mac addresses on that table. But due to the aging parameter, I don't see the mac addresses of all possible devices on the network that come ...
1
vote
1answer
282 views

Cisco Nexus: list all interfaces with their ips

This is the same as this question, but for Nexus: Junos: find out each interface's ip I need to show all interfaces with their respective IPs. I know that on IOS I can get that with show ip ...
1
vote
1answer
226 views

Is it possible plugging in a crossover cable to a 1Gb network adapter fried my adapter?

The host I am working with has two network adapters and is running Ubuntu Server 12.10. In an attempt to network two computers I used a cross-over cable as in the old 100Mbps days. After doing this I ...
1
vote
1answer
988 views

Junos: find out each interface's ip

Sorry if my explanation is confusing. I need to get all the ip addresses of a Juniper Switch and Router (different models). On Cisco IOS I can get that with show ip interface brief | exclude ...
1
vote
5answers
3k views

Virtual interfaces with default routes

My Ubuntu Server has one physical interface eth0. I want to assign 3 ip's (different subnets) to the server. I cannot use the default virtual interface creation tools like ifconfig or ip addr add ...
1
vote
1answer
154 views

Extract ip, mask and gateway of a network interface separately

I know that the command ifconfig will give you ip, mask and gateway of a given network interface. I want to "programmatically" extract each of those paramaters separately. At the moment the best ...
0
votes
0answers
78 views

Adding an IP range to SuSE 11

I'm looking to at a /22 to eth0 in addition to the address that is already bound to than interface. I'm familiar with using ifcfg-eth0-range0 in Redhat to accomplish something like this, but not how ...
1
vote
2answers
2k views

Problems bringing up a second virtual network interface

I'm having issues adding a second IP address to one interface. Below is my /etc/networking/interfaces # The loopback network interface auto lo iface lo inet loopback #eth0 is our main IP address ...
1
vote
1answer
562 views

How to execute a script only once, immediately after ALL network interfaces are up in OpenSUSE?

I run Opensuse 12.2. I have 3 network interfaces, eth[012] The interfaces are configured in /etc/sysconfig/network/ifcfg-eth[012] I want to execute a script immediately after ALL three interfaces ...
1
vote
1answer
190 views

Route Traffic Through Linux Server With Two Devices

Here is my current setup (all servers are Ubuntu Server Edition 12.04): Server 0 has two devices, eth0 and eth1. eth0 is connected to the wall (the internet), and eth1 is connected to a switch. ...
1
vote
1answer
269 views

Static network interface settings in Ubuntu [closed]

I am following the guide here to configure a fresh Ubuntu 12.04 server installation (running in VirtualBox) with a static IP address. The recommended configuration in /etc/network/interfaces is: auto ...