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0
votes
2answers
83 views

Machine as gateway between a router and local devices

I have a machine that I want to use as a gateway between the router. For example: Several machines on the network wants to access www.google.com lets say Send their requests to me I send them to my ...
0
votes
2answers
111 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 ...
0
votes
2answers
189 views

Routing table gateway

I have a VPS (CentOS 5.6). Here is my routing table. Kernel IP routing table Destination | Gateway | Genmask | Flags | Metric | Ref | Use Iface 192.x.x.0 | 0.0.0.0 | 255.255.255.0 | U | ...
1
vote
1answer
2k views

How to change default gateway on XP VPN connection?

When I connect to an XP VPN the default gateway for the connection is the IP address of the VPN server machine. I think this is the reason I cannot connect to the internet via the VPN. How do I ...
1
vote
1answer
378 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 ...
1
vote
1answer
2k views

pfSense - OpenVPN - tap - client connection: Default Gateway Error

We have setup a OpenVPN Server on a pfSense v2.0.1 Router with the "OpenVPN tap Bridging Fix package" to build a bridged VPN network. We followed this HOWTO: link Nearly everything workes fine expect ...
-4
votes
3answers
329 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 ...
0
votes
1answer
203 views

how to get gateway address

I am trying to get gateway address but when i call "route -n" I expect to see something like that Destination Gateway Genmask Flags 0.0.0.0 dnsip 0.0.0.0 UG ...
1
vote
1answer
182 views

Forward Request to Multiple Servers

We have 2 servers. One is old server and another is the new one. Currently we about doing a migration because the old server is not capable enough to handle everyday requests. The specs are: Old ...
0
votes
1answer
916 views

Connecting a LAN to an OpenVPN server via a windows 7 client gateway

I've got OpenVPN set up between my windows 7 client and linux server. The goal is that I'll get secure access to a webapp running on the server from any computer on the client LAN. I'm using ccd to ...
0
votes
2answers
1k views

iptables as gateway and POP3 SMTP ports

when trying to open the ports 110 and 25 in my iptables for outlook-only users, i cant do it except by forwarding as such: -I FORWARD -i eth0 -s 192.168.1.0/24 -j ACCEPT -I FORWARD -i eth1 -d ...
0
votes
1answer
460 views

Connectivity restored with `ping`?

My server is operating properly. Something happens... Suddenly, my server is inaccesible via ssh and http. (The only open ports in the firewall.) All eth0 configuration is static, no DHCP. ...
2
votes
1answer
342 views

iptables gateway not working on clients

I am not sure what's going on, but I have setup a gateway debian box with iptables and dhcpd server. The server is handing out the ip addresses to the clients just fine, gateway being set to the ...
-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
3k 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
7k views

How can I use iptables to forward all traffic to a certain website?

I have a Radius server doing Mac Auth on VLANs. If the MAC address isn't in the allowed table, the user is put into a separate VLAN. What I want to do on that separate VLAN, is have my Debian server ...
1
vote
2answers
3k views

Multiple VPN connections at the same time

I am investigating how to set up an SMS gateway that forwards messages to different mobile network operators. Connections to the operators are typically made via VPN. My question is how to configure ...
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 ...
0
votes
2answers
206 views

Routing traffic so that it appears to originate from a single (static) IP address

We have three sets of computers: clients, a single proxy and multiple servers. The clients (many) want to connect to the servers (many) using TCP on a specific and consistent port. Currently they do ...
0
votes
1answer
6k views

How do I increase FastCGI read timeout to prevent 504 error on nginx?

I am running a file with considerable amount of coding. It takes approximately 55 seconds to process 500 users, but now I have to process 1000 users. The default timeout is 60 seconds, so I have to ...
1
vote
2answers
860 views

Selecting gateway on application level on Linux

I want to decide on application level which gateway to use to connect to the internet. It can't be done by simple subnet rules, because it is really the application which should be able to decide ...
-4
votes
2answers
371 views

Getting IP addresses through sniffing [closed]

Is it possible to know the gateway address of a wireless AP that I'm not connected to through sniffing? Airodump-ng can show MAC addresses of the AP and the clients associated but doesn't show IP ...
-1
votes
2answers
2k views

Why do I get HTTP Error 504: Gateway Timeout on accessing public IP over Android

Question: When I start a webserver on my machine (on port 80), and then try to access it via my public IP, I get HTTP error 504 (Gateway Timeout). Why ? This only happens when I am connected to the ...
2
votes
1answer
308 views

setting up 2 subnets, Windows Clients (30 nodes), Linux Server, Samba, FOG

Its my first post on serverfault and my first time to setup this kind of network, so my apologies in advance if it is not well formed. I'm planning a small (education center) network that has about ...
0
votes
1answer
359 views

How do I get VirtualBox to use my Windows 7 host machine as a gateway? [closed]

I can't seem to find the answer to this. I have a Windows 7 (64bit) machine that is a company laptop. Company policy is very strict about adding machines to the network. I need to run a Linux ...
2
votes
3answers
169 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 ...
2
votes
4answers
486 views

Monitor bandwidth usage of a datacenter

I would like to know what application is best for measuring bandwidth usage in large datacenters. Our company is in the process of setting up a DC which will have around 1000 physical servers. We ...
0
votes
2answers
239 views

Linux or Windows Server as Gateway/Firewall [closed]

In my house, i'm running a server I use for testing purposes, and I'm planning on throwing away my knackered router, and making the server my Gateway to the internet and using it as a server for ...
3
votes
1answer
409 views

Passing client MAC addresses to DHCP server over VPN

I'm tasked with implementing VPN access on a gateway. The LAN DHCP server is configured to assign the same IP address to a given MAC address. I would like to have this functionality for clients who ...
0
votes
2answers
148 views

Linux as a router for public networks

My ISP had given me a /30 network. Later, when I wanted more public ips, I requested for a /29 network. I was told to keep using my earlier /30 network on the interface which is facing ISP, and the ...
0
votes
1answer
227 views

Setup dhcpd without gateway on purpose

I have an XP machine with two network interfaces. One is connected to my company's network (and the Internet). The other is a very local network which connects some hardware with my PC. Both the ...
6
votes
4answers
737 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
6k 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 ...
0
votes
1answer
4k views

How to make LAN PCs (Windows) accessible from a SonicWALL L2TP VPN connection

We have several LAN devices connected via a physical wired network to a SonicWALL TZ210 on subnet 192.168.2.0/24. Several of those devices are assigned DHCP addresses in the range 192.168.2.100 to ...
4
votes
7answers
616 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 ...
1
vote
2answers
956 views

Checkpoint R75 Security Gateway without default route

I've set up a virtual lab network in vmware with two networks. vmnet2 (192.168.100.0/24) and vmnet3 (192.168.200.0/24). My R75 is having the ip addresses 192.168.100.1 and 192.168.200.1, and is the ...
0
votes
2answers
503 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 ...
0
votes
2answers
256 views

webserver from local network (behind NAT)

I have a debian server (gateway, web) which is behind ISP's NAT. I need access on webserver from my local network but domain has DNS record for external IP. Can I create "fake dns" for my local ...
3
votes
2answers
877 views

how to add iptables rules for two NICs on CentOS(act as a gateway)

I have a machine C with two NICs, namely eth0 and eth1, with CentOS 4.9 installed on it. Also I have a machine A connecting to C through eth0 and a machine B connecting to C through eth1. Now I want ...
1
vote
1answer
480 views

machines of two subnets communicate through CentOS(with two NICs)

folks. Firstly, I really have done a lot of searching, but still couldn't find a problem which was exactly the same as mine, and I have tried some of their answers, but didn't work. Finally, I put my ...
0
votes
3answers
1k views

Ubuntu 10.04: Two interfaces on a same subnet with a same gateway

My ISP has given me a 187.x.x.224/29 subnet. The gateway is 187.x.x.225 I have a Ubuntu server with 6 ethernet ports. The server does NAT routing and also acts as a webserver. My plan is to have eth1 ...
0
votes
1answer
75 views

Which brands of wireless routers and DSL modems care about security? [closed]

Which vendors have established a strong security process during development where they educate firmware developers about security issues, arrange security engineers to review the code, accept ...
1
vote
4answers
599 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 ...
1
vote
2answers
639 views

Port Forwarding not working locally

I have a new Comcast Business Gateway that just replaced my old, perfectly-functional residential modem. I noticed the router I had only had a 10/100 ethernet WAN port but I have a 100mbit connection, ...
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 ...
0
votes
1answer
847 views

Openvpn basic configuration for full traffic routing

My client machine is Ubuntu 11.04, my server machine is Ubuntu 10.10. I'm trying to achieve the simplest quick and dirty solution possible to get all my client machine's traffic to be redirected to ...
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 ...
2
votes
1answer
280 views

Rackspace Firewall/Gateway Setup

I have rackspace account and wish to have this sort of setup: Firewall/Gateway eth0 - Public IP (56.X.X.X) eth1 - Private IP (10.X.X.X) Ubuntu 10.10. Accepts connections from the internet and ...
0
votes
2answers
401 views

Linux add route error

Here are these Linux and IP: LinuxA: eth0 188.9.5.2, tun0 10.0.0.1 LinuxB: eth0 188.8.6.3, tun0 10.0.0.2 LinuxC: eth0 188.9.7.4 LinuxD: eth0 10.62.8.5 On LinuxA, I can ping to 10.0.0.2 of LinuxB. ...