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0
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1answer
294 views

Weird routing issue

I am working on getting networking working correctly on a cluster of 14 virtual servers at a customer site. 11 of them work fine for routing and 3 don't work correctly for their administrative ...
1
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2answers
517 views

Gateway redundancy on a single subnet

I'm trying to discover if there are any methods to have more than 1 default gateway (in a fail-over strategy) on a single subnet. If one gateway goes down then I would like to have servers fail-over ...
1
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0answers
519 views

IPcop Multiple WAN Subnets

We have an IPcop firewall and have had no issues with it. We've had a block of 10 IP addresses from our colocation provider and have been able port forward from those to internal servers as needed. ...
3
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1answer
2k views

What is the purpose of netcat's “-w timeout” option when ssh tunneling?

I am in the exact same situation as the person who posted another question, I am trying to tunnel ssh connections through a gateway server instead of having to ssh into the gateway and manually ssh ...
2
votes
1answer
432 views

What causes packet loss from Debian server to nearest gateway?

I have a debian Squeeze KVM server hosted with an ISP. The server doesn't have much load (average 0.1) and has sufficient memory, low network traffic, low disk i/o etc etc. It's running standard LAMP ...
2
votes
1answer
201 views

open source solution to a gateway for a network of a housing cooperative of 150 people

i just inherited a barely functioning network for a student housing cooperative of about 150 people. in it's current state, as i understand it from the previous person in charge of the network, we ...
0
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1answer
836 views

Is there a free linux distribution that provides network services with an Web interface? [closed]

What I have in mind and used is a commercial gateway/firewall with an web-interface for configuration that has this specifications: Administration Network Monitoring and logging Authentication ...
0
votes
2answers
4k views

arp -n responds with (incomplete) on the wrong subnet, can't remove it

context There are 2 servers: server1 - eth0 10.129.76.16 eth0.2 192.168.0.103 server2 - eth0 10.129.79.1 eth0.2 192.168.62.101 The 192.x.x.x addresses are connected to the ...
0
votes
1answer
126 views

Protect software default gateway from ip-stealing

We have a corporate network that is comprised of the following elements: Internet cable (wall) <-> (ext interface (DHCP))(Windows Server 2008, TMG-enabled, Internet Gateway)(int interface (static ...
2
votes
1answer
446 views

I need to change the external IP address based on source IP address

I'm running an iptables firewall with 5 aliased ip addresses (actual ip 10.64.18.1). This machine is also my gateway out for all internal machines (192.168.18.*). My problem is, when 192.168.18.65 ...
2
votes
1answer
1k 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 ...
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votes
2answers
70 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
900 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 ...
4
votes
2answers
4k views

OpenVPN connection works but no gateway is assigned

i try to setup openvpn on a vps and I'm able to establish a connection to the server, but the gateway isn't assigned to the client. Here are my config files: client config: client dev tun proto ...
1
vote
1answer
3k views

TMG 2010 Edge Firewall Setup - Internal subnet has no internet access

I just set up a TMG 2010 server as an edge firewall. The TMG machine has two NICs: LAN: IP-192.168.1.1, Netmask-255.255.255.0, DNS-192.168.1.3, Gateway-(blank) WAN: IP-119.x.x.98, ...
0
votes
1answer
315 views

Add IPv6 support to DirectAdmin server

I just set up an new DirectAdmin, and I want to prepare it for IPv6 use. My ISP have gave me an range of IPv6 addresses that I can use. Lets say that address is 2a01:7c8:**:1f::. My neworkadapter ...
5
votes
1answer
1k views

Utilize two gateways on the same network same interface with load balancing

My setup is two ISPs on a single interface and single network. I can either set my default gateway to 192.168.0.1 or 192.168.1.250 and either work. Edit: Netmask (as noticed in the comment) is ...
2
votes
2answers
127 views

Calculate data transferred in a local LAN

How do you calculate the data flown between a computer and the gateway computer. I have a Linux router/gateway running IP Tables which routes internet traffic in a LAN. I have individual users with ...
0
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2answers
84 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
117 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
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2answers
195 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
438 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 ...
0
votes
1answer
207 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
195 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
1k 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
511 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
373 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 ...
1
vote
3answers
4k 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
8k 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
7k 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
927 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 ...
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votes
2answers
425 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
3k 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
336 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
407 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
180 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
519 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
264 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
457 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
152 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
249 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
995 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 ...