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99 views

Linux router with multiple gateways and port forwarding

I want to use a Linux VM to act as several routers at once. I have multiple servers hosting different services and dedicated public IP for each of them. Super simplified setup example: Ubuntu ...
2
votes
1answer
75 views

Complex DNS resolution on non-connected networks (Ethernet & InfiniBand)

We're having problems with DNS resolution working properly when each server is on two, non-connected networks (an Ethernet and an InfiniBand). An example network can be seen by the basic Visio ...
0
votes
1answer
101 views

Win 2K8 R2 Server, 2 NICs - internal and external - network configuration

I have a Windows server with 2 NICs, a modem/router, a switch and some client computers. I have been trying to set everything up like so: Internet - external NIC - server - internal NIC - switch - ...
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1answer
65 views

Remove gateway for private network on Server with 2 ethernet ports - Why

I have a server with 2 ethernet ports, use one port (eth0) for the private LAN, and a public IP from ISP is on second port (eth1). I have it working, but I'd like to know the reason why I have to ...
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0answers
1k views

vagrant fails to bring up additional adapter for centos vm using virtual box provider

this is in continuation of the question asked here about host only adapter on dhcp I upgraded to vagrant 1.6.3 and the updated Vagrantfile to following setting for multiple adapters # add additional ...
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1answer
5k views

Setting up routing in CentOS 6.4 as a router/DHCP server with two nics

I am stumped about how to setup centOS 6.4 to route packets. |Local Network| -eth0- |CentOS 6.4 box| -eth1- |Internet| The centOS box has a dhcp server running. Currently it is handing out IP ...
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votes
1answer
710 views

VSphere 5.1 DHCP Server VM routing

I am trying to setup the routing for a VM that is my firewall/dhcp server. I have 3 VMs: router/firewall (centOS) -> VM1 unRAID(unraid) -> VM2 download-server(ubuntu server) -> VM3 2 NICs vmnic0 ...
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1answer
735 views

FTP Error 500 Illegal Port Command - PORT command sending different IP than source of request

The problem I'm experiencing is that I'm getting a "500 Illegal PORT command" Response from an FTP server when attempting to upload a file programmatically. This program is a small c# application ...
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2answers
155 views

Static route to all ips except a defined set

I was wondering whats the best way to do a static route for all ips except a predefined set. For example, I have 2 networks attached to one workstation. I want all ips except 192.168.0.0/24 to go ...
-1
votes
1answer
56 views

Specify what network connection to use based on IP being accessed [closed]

Basically, we have a number of machines with two network cards. One is wireless, one is not. The wireless is connected to the internet, while the other one is connected to a route and a bunch of ...
0
votes
1answer
188 views

Additional external IP address is not reachable when acitvating NAT

I am running a Windows Server 2008 R2 with 3 nics (2 with external IPs, 1 with internal IP). The two external IPs are associated with two web sites running on that server. The third nic is for ...
2
votes
1answer
61 views

Email flow issues when additional NICs are activated in Exchange 2007

I am currently working in an Exchange 2007 Environment which is quite basic - an EdgeSync Server and an CASHUB. Both of which have two NICS, ostensibly for an internal and external interface in the ...
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vote
2answers
522 views

VMWare vSphere 5: 4 pNICs for iSCSI vs. 2 pNICs

New SAN for me, never used before: it's an IBM DS3512, dual controller with a quad 1GbE NIC per controller that a client bought and needs help setting up. Hosts (x2) have 8 pNICs and while I usually ...
4
votes
1answer
2k views

In Icinga (Nagios), how do I configure hosts with multiple IPs?

I'm setting up Icinga (Nagios fork) and I have some machines with multiple interfaces. Some services are only listening on one of them and to check them correctly, I like to know if it's possible to ...
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vote
1answer
720 views

IIS6 can't find site on local network

I have a windows 2003 server with dual NICs running IIS6. I can access everything remotely, but the internal network can't seem to find the site regardless of which IP Address I try to go to. There ...
2
votes
3answers
3k views

multiple physical interfaces with IPs on the same subnet

I have a linux box with 9 NICs on it, and I want eight of them to have unique addresses on the same subnet, e.g.: ifconfig eth1 192.168.123.1 netmask 255.255.0.0 ifconfig eth2 192.168.123.2 netmask ...
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3answers
2k views

Multiple network cards, controlling where my traffic goes

This is an Ubuntu 12.04 server install. I have multiple network cards, eth0 and eth1 lets call them. eth0 is connected to the internet, and all of my traffic goes through it, until eth1 gets plugged ...
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2answers
254 views

WinServer 2008R2, Two NIC's, forcing an app to use one of them

Short form question: Is there a way to tell an app to use the secondary NIC as a route even if it has a higher metric? Long form question & explanation: I have a Windows Server 2008R2 with two ...
2
votes
2answers
1k views

Ubuntu Ignoring packets from network A on eth0 when eth4 configured on network A

I have an Ubuntu 12.04 (final beta, up-to-date) server with two configured network interfaces: root@mac:/home/sysadm# ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:4f:28:fd:7b inet ...
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vote
0answers
143 views

Multiple NICs config, disconnecting eth0 disconnects all other interfaces

Good Day, I'm using hardware that streams data, it has 4 Lan ports and is running Linux 2.6.23. I've run into some strange behavior with ARP tables reporting multiple IP addresses to single MAC ...
0
votes
1answer
341 views

Combine two NIC's into one preserving routing (DMZ server / Windows or Linux)

We have a DMZ server with two NIC's, one is accessed from the Internet (public IP) and one from behind the internal firewall (private IP). One application has problems to cope with a 2 IP's / 2 NIC's ...
2
votes
1answer
314 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 ...
2
votes
1answer
204 views

Consumer board for 4* commodity cluster in tetrahedral back-to-back GB-lan topology

I'm not very sure what consumer board to choose for such a configuration. Im planning to build one or more "Beowulf-like cluster" (starting with one for testing), one such cluster consists of four ...
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2answers
4k views

Setting up two NICs on two separate LANs provides error

I wish I had found this before starting in, but it's too late for that... I am running CentOS 5.5. I started following this guide for setting up two NICs on different networks. Everything was ...
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votes
3answers
10k views

How should I set up multiple NICs for Hyper-V?

I have a PowerEdge server that has 1 management NIC and 4 other NICs. I have the management NIC set up so that I can access iDRAC and it works great. Now I'd like to set up Windows 2008 R2 Hyper-V. ...
0
votes
1answer
106 views

Why do I occasionally lose the ability to connect to a file share from a multihomed web server?

I have an ASP.NET web application that transfers requested files from a (LAN) network share to the (Internet) end user. Most of the time it works fine, but occasionally the application is not able to ...
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vote
2answers
531 views

Dealing with redundant Ethernet and WiFi under Windows

What happens under Windows (XP Pro SP3, specifically) when you have multiple network interfaces configured on the same subnet, like when your ethernet is plugged in and your WiFi is active at the same ...
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vote
2answers
21k views

How to properly setup a server “teaming” across multiple NIC's in windows server 2008?

Ok, I have read about installing multiple nic's in a server and expanding the throughput capabilities through load balancing. I might be using this term incorrectly. Now, depending on the application, ...