0
votes
0answers
36 views

debian multiple network interface multiple networks

I have a virtual environment with 3 virtual machines on one host. One of my virtual machines has 2 network interface. I need the virtual machine with two interfaces to connect to two different ...
1
vote
0answers
56 views

Proper way of setting gateway outside of subnet on FreeBSD?

I have a VPS running FreeBSD 10 and it is located in OVH's BHS datacenter. The gateway for my VPS is not in the same subnet as my IP address and when I went to set the gateway the usually way, it ...
0
votes
0answers
51 views

Some client in my network, sometimes can't ping Gateway and DNS server

I've a local network with 100-150 clients, one Core Switch and 10-12 switch that Switchs are connected to the Core Switch and clients are connected to switchs. In my network sometime some clients ...
3
votes
1answer
88 views

OpenBSD default gateway outside subnet

My ISP offers IPv6 by default. However, my ISPs IPv6 setup appears to be a bit strange because the default IPv6 gateway is located outside of my servers subnet. Under linux it is possible to setup a ...
0
votes
1answer
33 views

arpspoof: fetch packets of different gateway

I have to test a network which have 5 different gateways. I am connected to one of the gateway and I am able to ping the other gateway in the network. It is possible to generate fake arp request using ...
0
votes
0answers
38 views

Make access to VPN via another host in local network

My network structure: -------------- -------------- | WINDOWS | | LINUX | | VPN ACCESS | | NO VPN | -------------- -------------- | ...
0
votes
0answers
35 views

Two network interfaces access from the third subnet

I faced the following problem. There is server (Ubuntu 12.04) with two NIC that have IPs 192.168.40.147 (eth0) in 192.168.40.128/27 subnet and 192.168.40.165 (eth1) in 192.168.40.160/27 subnet. Now we ...
0
votes
1answer
442 views

Hyper-V: Guest external internet access

Following setup: Host machine has 1 physical NIC Host OS = Win Server 2008 R2 (hosted in data center) Guest OS = Win Home Server 2011 Network setup basically as described here or here. Goal: ...
1
vote
1answer
146 views

Two network cards - two routing tables?

I have sporadic routing problems in my setup which I suspect to be an issue with the routing and two network interfaces. I'm running two maschines with XenServer They both have a public NIC with an ...
1
vote
2answers
105 views

How to identify and differentiate networks so I can set location?

I am a developer and know just whatever sysadmin/networking/etc stuff I've picked up over a lifetime of computing and developing (not an inconsiderable amount, but I am very far from an expert on any ...
1
vote
1answer
134 views

Configuring Debian as a gateway for two networks

Having a debian server with multiple NICs (eth0 and eth1) acting as a gateway. How would I be able to configure these NICs, so they can route the traffic from one to another. Network layout: ...
0
votes
1answer
1k views

Proxmox - single public ip with multiple vms, openvz containers work, kvm's don't have a route

Currently I only have a /30 block (1 usable IP) (I just ordered a /28 for 13 usable publics, waiting) I just installed proxmox, set up a few virtual containers. Port forwarded the necessary ...
0
votes
2answers
274 views

Why VM cannot get the public IP I have from provider?

I have a KVM-Host (on Debian) with root@kvm-host:/# cat /etc/network/interfaces auto eth0 iface eth0 inet manual auto vmbr0 iface vmbr0 inet static address 176.x.y.133 netmask 255.255.255.224 ...
1
vote
0answers
218 views

Unable to ping gateway via bridge nic

I'm trying to install KVM on Ubuntu 12.04 server. We have multiple nic on this server of which we primarily use eth0. The server network runs fine(i'm able to ping gateway, ping dns server and ping ...
0
votes
1answer
61 views

Adding an interface-specific gateway

Desired result: Assign an interface-specific gateway in the circumstance that are also receiving general DHCP-supplied gateway settings. Current situation: Interface-specific gateway setting is not ...
0
votes
2answers
351 views

How to configure a 2nd router to act as VPN gateway

i need to configure a new router with DD-WRT, in my network, configured as gateway VPN. My main gateway router is configured with ip Address 192.168.1.254, Subnet 255.255.255.0. It act also as DHCP ...
3
votes
2answers
369 views

Mysterious “fragmentation required” rejections from gateway VM

I've been troubleshooting a severe WAN speed issue. I fixed it, but for the benefit of others: Via WireShark, logging, and simplifying the config I narrowed it down to some strange behaviour from a ...
-1
votes
2answers
150 views

Client Login before accessing the internet [closed]

I wanted to create an internet gateway server where the client connecting to my network must enter a username and password, where the server checks if username and password is correct before they can ...
1
vote
2answers
250 views

If I have computers linked through a switch, will they communicate directly? [on hold]

If I have a network like: Group1 -> Switch -> Switch -> Server (configured as gateway by DHCP) Group2 -> Switch -----^ (Hope that makes sense...) When computers in each group send ...
4
votes
1answer
189 views

ping request not forwarded in one direction

Edit: I solved my issue just as I was finishing this insanely long post. I had simply not enable ping reply in my windows firewall which is why I could not ping a computer on network 0 from network 1 ...
1
vote
1answer
120 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
votes
1answer
67 views

Cannot connect to external 192.168 address [closed]

I am connected via VPN to another network which uses IP addresses in the range 192.168.x.x. I have changed my home network to not use that network (I use 10.10.x.x). However, I cannot seem to access ...
1
vote
2answers
108 views

Chain Gateways on the LAN

I installed m0n0wall in a virtualized environment, i have 10 PCs connected to a router ( 192.168.1.0/24) which connect them to the internet through PPPoE, the problem is that this router does not have ...
3
votes
2answers
129 views

Preventing endless forwarding with two routers

The network in quesiton looks basically like this: /----Inet1 / H1---[111.0/24]---GW1---[99.0/24] \----GW2-----Inet2 Device ...
2
votes
2answers
183 views

Default route not on LAN

I have a network that in principle looks like this: H1---\ /----Inet1 H2---->---GW1---< H3---/ \----GW2-----Inet2 H1 and H2 = Hosts that need access to internet with GW1 ...
4
votes
2answers
184 views

2 nics. 2 Defaults Gateways

Here is my scenario: i have this server with 2 nics, each one with different IPs, connected to differents routers. Almost everything is configured whe way i need. Traffic coming from eth0 exits ...
0
votes
1answer
328 views

Two Cisco 2901 Back-to-Back using X.21 (HWIC-2T) - Am I missing some config?

I have two Cisco 2901 GWs, each has an HWIC-2T interface module. I want to set them up back-to-back to send network traffic between PCs and Phones connected to my GWs over this link. I have ...
2
votes
1answer
957 views

What is the right place for default gateway in CentOS/RHEL?

As I can see there are 2 places where GATEWAY option could be used in CentOS: /etc/sysconfig/network /etc/sysconfig/network-scripts/ifcfg-* What is the right place for default gateway and what ...
-3
votes
2answers
66 views

How do i create a 'layer' in between my router and a user connecting to it [closed]

Like when you go to starbucks the first thing you see if you go to their wifi is "Welcome to starbucks, please accept our terms". Or also at most airports, it makes it impossible to surf until you ...
1
vote
2answers
655 views

Linux (Ubuntu 12.04) two gateways one nic

I have Ubuntu 12.04 Server edition Two gateways, both on 192.168.0. network, let's make them 192.168.0.1 and 192.168.0.2 I've read you should be able to add second gateway into ...
0
votes
2answers
104 views

advice on gateway address

I am wondering if a node on a subnet should have its default gateway set to the IP of the router or should it be the IP address of the switch? In Packet Tracer, I am using the router's address as the ...
2
votes
1answer
1k views

Centos 6.2 Fresh 'Basic Server' install networking issues

I've had a /29 provisioned on a network port for a server and am trying to at least configure the machine so I can ssh into it. It's Centos 6.2 x64 with the Basic Server install. Currently not able to ...
1
vote
1answer
316 views

Network Gateway Options for Small Office: Cisco 800 series router vs. Linux/*BSD (e.g. pfSense) on a white box vs. reflashed DD-WRT/Tomato/OpenWRT

Our existing network gateway's hardware has just failed (it was a repurposed desktop machine running Debian + Shorewall that we threw together), and we're looking to replace it. For now, we've fallen ...
-4
votes
3answers
291 views

How to configure PC as a gateway?

I'm researching a project. If lets say a lab has 20 PC, 1 tutor PC and the rest is 19 student pc, and in my project all the network traffic from student pc should go through the tutor pc before ...
-1
votes
1answer
2k views

CentOS gateway setting on startup

I'm running CentOS 6.2 on ESXi 5. The machine has 2 NICs, eth0 is connected to the Internet and eth1 to a LAN. eth0 has a single colo provided IP address, so the netmask is 255.255.255.255. The ...
0
votes
3answers
2k views

What can I do if my organization is running out of IP addresses?

My organization is going to run out of local network IP addresses within the next few months. We are expanding to get a ton of new people and we are switching over to Lync IP phones. Crunching ...
3
votes
1answer
93 views

Our datacentre is forcing us to change IP addresses, what is the best way to take advantage of the period when they're both active (failover gateway)?

The subnet of IPs the datacentre gave us was apparently on loan, so they assigned us a new block and gave us two weeks to swap them over, during which both will be active. They're on totally different ...
2
votes
3answers
154 views

Accessing the servers via their WAN IPs from the internal network - connect them to LAN too?

Currently we have a few servers behind a router/gateway, which is in bridge mode, so the servers have directly assigned WAN IPs with no NATting performed. This works as expected. There is, however a ...
6
votes
4answers
551 views

Is it possible to find out what gateway is available on a network without prior knowledge?

A colleague and I both presumed this was a clear "no" but, admittedly, our networking knowledge is limited. Is it even possible that, without prior knowledge of the network configuration (i.e., no ...
1
vote
2answers
5k views

How can I share my internet connection to my LAN with Debian?

I'm trying to make my Debian server the router for my LAN. I got two interfaces: eth0 connects to internet through PPPoE, eth1 to LAN. I switched on forwarding in sysctl net.ipv4.ip_forward=1 and ...
4
votes
7answers
513 views

multiple internet connection at office

We have been using two separate Internet connections in our office. People will share internet connection by setting their gateways to either of these. Gateway is one of our local server through ...
0
votes
2answers
410 views

Traceroute doesn't reach gateway

i have problem with my opensuse 11.3 network. So, i've assigned ip 192.168.137.2 to it, and another computer (win7) with ip 192.168.137.1 On the opensuse, the gateway is the 192.168.137.1. and the ...
1
vote
4answers
518 views

How to setup a small office network with a VPN client and a shared Internet gateway

I manage a small-office network but have very little actual networking knowledge / understanding. The network has a consumer grade wifi router (Netgear DG834G), several PCs/Macs, some iPads connected ...
0
votes
1answer
64 views

Servers cannot see internet gateway though their configuration is the same to another which can

I have 2 switches at the Data Centre - one is connected to the internet, and one for the internal private network. All servers have one NIC into the internet switch and one to the private one. All ...
2
votes
4answers
2k views

Linux Ubuntu - Two NICs separate lan

I have this /etc/network/interfaces (IPs on eth1 are fake) auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255 gateway ...
0
votes
2answers
452 views

How can I use a gateway (or proxy) situated at the other end of a wifi layer 3 bridge?

I have a main and branch office. The branch office has a flaky internet connection and I'd like to let users in that office surf the internet using gateway (or proxy) in our main office. I have a ...
2
votes
2answers
377 views

Multiple Gateway improve performance

I have a proxy Server and a PBX server that both have their own router as a gateway. Nevertheless, the company acquired an additional more stable ISP and now I have three Internet connections. Is ...
5
votes
6answers
6k views

What's the difference between a gateway and a router?

Here we can see the router is 67.23.27.187(first hop), but the gateway is 67.23.27.1. What's the difference between a gateway and a router? How does my computer know the IP of the router when only the ...
0
votes
2answers
329 views

Centralized MAC filter for wireless lan

I am attempting to install a MAC filter in between a switch that handles my wireless network and the core of the network. The idea is to have a centralized MAC filter bypassing the filters built into ...
0
votes
2answers
854 views

Routing traffic through a specific port depending on Subnet requested

I have my network setup with a sonicwall device as the default gateway so all my traffic goes in and out through it. Now I have just setup a VPN on a cisco router from our local network of 192.168.5.X ...