0
votes
1answer
243 views

Proxmox private network between KVM and VZ

Sorry for asking this eventually trivial question, but I'm fighting with this for more than a day, and was unable to figure this out by myself so far. Situation Proxmox host running a bunch of ...
1
vote
2answers
167 views

Is VLAN separation required for multiple networks?

I am setting up a Dell 6248 combining separate switches used previously. I am planning the following architecture: VLAN 1 - External traffic (each server's public interface connects to this) VLAN 2 ...
2
votes
1answer
92 views

How do you change tcp_congestion_control on OpenVZ?

I have a network of OpenVZ machines that I am testing various congestion control methods on. I need to know how to change the congestion control. Currently I get nothing but permission denied. Is it ...
0
votes
1answer
93 views

PC in two VLANs with one interface ping issue

im having a problem with a netkit lab that im wornking on. I have one switcher and 3 PCS (PC1, PC2 and PC3). PC1 and PC3 must be on VLAN 100(100.1.0.x/24), PC2 and PC3 must be on VLAN 200 ...
0
votes
2answers
92 views

Separate 2 networks with 1 Windows Server

The situation is: I have 1 router 192.168.1.1, 1 switch, 1 windows server and a basic LAN of devices accessing it. I need to split into 2 separate LANs with full Internet access each, but isolated ...
1
vote
2answers
777 views

VMWare Workstation - how to automate or script changes to the virtual network configuration

VMWare Workstation (I'm using V8 on Linux) provides a GUI tool, Virtual Network Editor (vmware-netcfg) to edit the virtual network adapter settings for use by the VMs on the system. I'm dealing with ...
0
votes
1answer
125 views

What is th tap100i0 device on my debian with KVM?

I want configure a network for virtual machines on KVM. I created a bridge. But I found a new tap100i0 devise was created. Should I take it into account to get the virtual network running?
2
votes
2answers
90 views

VLAN & Communication

I'm working on a project regarding Network Security and I've come to the topic regarding VLANs. I was wondering if it is possible to set up multiple VLANs (VLAN0, 10, 20, 30) in a way that all VLANs ...
1
vote
2answers
29 views

Switching wired interface in Server 2008R2

I have two 1 Gb wired Ethernet ports on a Dell server. I am trying to move to wired port #1 because of physical damage to wired port #2. The trouble is, 2008R2 won't let me have two interfaces with ...
0
votes
1answer
193 views

Cisco ASA 8.4+ redirect multiple ports - best practice?

I was wondering whether anyone could advice on best practices as to the best way to redirect multiple ports for single host in the internal network. As I understand this you can only nat a single ...
3
votes
1answer
61 views

Routing table configuration

Suppose having an routing table in which the default-route is missing can a router work without a default-route or the table is incomplete? and having these two entries is also legit or there is an ...
0
votes
1answer
408 views

How to configure RRAS VPN behind a DSL router on as single NIC 2008 R2

I already had this running once with an older server, but now I changed hardware and cannot get this running again (I'm more a dev than a admin). Here's my network setup: Internet | DSL Router | ...
3
votes
2answers
75 views

Autonegotiation on laptops for mobile users a must now?

I work in Unified Communications for a company with about 9000 desktops and laptops. I'm part of a team who is implementing and supporting things like Lync and Jabber Video and audio conferencing. ...
0
votes
1answer
568 views

Log incoming traffic on PAN-OS (Palo Alto Networks) firewall

Have a Palo Alto Networks PA-200 firewall with the basic setup complete, all outgoing traffic allowed and working fine. This is showing up in the traffic logs going from the created internal and ...
1
vote
1answer
1k views

Cent OS ifcfg configuration for ranges of IP's with different netmask

I have 1 set of 30 public IP's with a netmask of 255.255.255.0 and another set of 30 IP's with a netmask of 255.255.255.128. Both sets of IP's also have different gateways. How can I virtually assign ...
0
votes
2answers
77 views

ubuntu eth0 up but not online

I've been installing an Ubuntu Server on a local machine. Ive configured the eth0 in the interfaces (Static) and I can ping the router aswell as other machines in the network can ping the server and ...
0
votes
1answer
361 views

What is the simplest way to route web traffic via separate (dedicated) interface? [duplicate]

Possible Duplicate: iptables - Target to route packet to specific interface? Ubuntu 12.04. So on the client's machines I've got two NICs eth1 and wlan0. I'd like all the web browsing ...
1
vote
0answers
309 views

Cisco with site-to-site and EzVPN - configuration Issue

This is the first time for me to work with Cisco Router. The below mentioned is my configuration where Cisco Srv is Cisco 7200 Series Router XYZ is one VPN Server running on Linux. RAC is ...
0
votes
1answer
464 views

How to configure network connections between computers for Ubuntu Cloud Infrastructure

With the release of Ubuntu 12.04 I thought I'd try my luck with a private home cloud, I've been reading everything I could find but I've got some questions. I'm thinking of a pretty simple setup of 1 ...
1
vote
1answer
148 views

How to manage the configuration of several Linux client systems?

I am managing a number of machines (about 20, their hardware is quite different) which can be used by people in my college. Both ArchLinux and Ubuntu are installed on these machines, and I'd like to ...
2
votes
1answer
246 views

2 separate postfix instances and confusion with IP's in received field of mail message

i have a problem with my 2 postfix instances. 2 separate IP's and coressponding domain names are setup on networking, they are working fine. I want second mail message (below) to have Received: from ...
0
votes
2answers
655 views

set PROMISC mode for switch in Linux

How do I set the promisc mode on for a switch. I have two SW like below: root@chandler:~# brctl show bridge name bridge id STP enabled interfaces br0 ...
-2
votes
1answer
53 views

Accessing a machine with a non-static IP from outside the network [closed]

I have a machine listening for ssh connections within a university network. The way that they've configured the network is such that each building is assigned a single external IP. I have no ability ...
0
votes
1answer
2k views

Virtual machine with two nics connected to different networks on VmWare ESXi 4.1

I have a virtual machine and the need to add a different network to it. 1st nic is already working on 192.168.1.1 2nd nic should be working on 10.0.0.1 I've added the new nic and connected both to ...
0
votes
2answers
136 views

Unreachable host inside network

I'm trying to use some unusual network configurations. Host1 (internet gateway): IP: 192.168.0.1 Mask: 255.255.0.0 Host2: IP: 192.168.1.10 Mask: 255.255.0.0 Default gateway: 192.168.0.1 I can't ...
2
votes
1answer
636 views

How do I make sure that outgoing http requests are enabled on my Ubuntu Server box?

I'm new to the Linux world and to the world of server administration. I bought a used Pentium D (2.66) to use as a personal web server. I have Ubuntu Server running with Apache2, php5, and mysql. My ...
3
votes
2answers
7k views

How can I force Squid Proxy to use a specific gateway for internet access?

I've been finally able to set my ubuntu 10.04 server as transparent proxy using squid. It works exactly like I wanted but I have a serious problem... On both ethernet cards I have the chance to get ...
2
votes
3answers
757 views

Cisco Default Character Encoding on Console

Question What is the default character encoding used by most Cisco devices when communicating over the console? Background I'm a software developer, writing an application that interfaces with ...
9
votes
3answers
4k views

What is needed to use anycast IPs?

So, there're a bunch of questions on SF about the uses and how anycast IPs are cool. My approach is something more practical. What specifically I need to have to use one of those addresses? Do I ...
0
votes
1answer
169 views

static route configuration?

i rewiew my router configuration and i found :- ip route 0.0.0.0 0.0.0.0 Serial1/0:1 ip route 10.0.14.31 255.255.255.255 FastEthernet0/0 what we mean by two command ??? and what we mean by ...
0
votes
4answers
180 views

How to prevent virtual host from connecting to network?

We are discussing the potential of issuing standardized VM images to our staff to use when connecting to our corporate network from their personal computers. Ideally they could run this VM on any ...
3
votes
1answer
3k views

Two ESXi host servers connected to eachother's second NIC

Essentially I have two physical servers (Both identical, both ESXi hosts, each with 2xdual gbit nics) in a private rack in a data center. They will both be running a variety of db/web/storage server ...
2
votes
2answers
1k views

Cisco ASA 5505 Config

I have looked through a lot of these posts on the Cisco ASA5505 as well as gone online. I am looking for some straight forward step by step instructions to complete the following tasks. I know how to ...
0
votes
4answers
1k views

Ubuntu guest on vmware esxi multiple nic network config

I am trying to get several ip addresses to be attached to a virtual server running ubuntu 10.04 on vmware esxi. using esxi i have assigned it 10 virtual nic's which are all connected to the same ...
0
votes
1answer
118 views

FreeBSD 8.0 upgraded from 7.2 won't configure network interface from rc.conf

Prior to upgrade, the network interfaces were configured with brex_ifconfig statements in rc.conf. After upgrade, this fails. If I log in locally, and do ifconfig from the command line, and then ...
0
votes
1answer
902 views

ubuntu network interfaces config

I had many ip-s routed to my dedicated server. Interfaces file look like this auto lo iface lo inet loopback auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask 255.255.255.xx gateway ...
4
votes
3answers
10k views

How do I get ubuntu to reconfigure /etc/network/interfaces for me?

How do I get Ubuntu to figure out the interfaces available on my computer and generate a new /etc/network/interfaces file? It created it the first time so I know it can somehow. Is there something ...
2
votes
3answers
4k views

How to get access to console to reset Cisco 3750?

I acquired two Cisco 3750 switches from another part of my organization. I was able to complete the standard password/config reset procedure on one without any issues -- boot it, put it into express ...
0
votes
3answers
243 views

How to access web server of any machine of my network from the outside

I have an ip like username.dyndns.org, this is the external IP of my router. On my lan, I have several machine (m1, m2, ...) , each running a dedicated web server. Is it possible to reach each machine ...
0
votes
1answer
565 views

What package do I need to isntall on CentOS 5 to get system-config-network X11 GUI?

The title says it all really. What package do I need to get via yum on CentOS 5 to be able to run the X11 version of system-config-network? ATM I only have the tui version which is horrific. ...
2
votes
1answer
3k views

How to ignore a set of Mac addresses in dhcpd.conf?

Is it possible in dhcpd.conf to ignore requests from a set of MAC addresses? Something like this: host vminstances { hardware ethernet d0:0d:*; ignore booting; }
1
vote
2answers
2k views

Bonding Nics with Linux to get better performance

I am trying to bond two nics together to get better performance. I have two 1000MBps Intel Nics. When I had one nic I was running some benchmarks getting 106 MB/s. This is pretty close to 1GBps. So I ...
0
votes
3answers
161 views

VPN - What is the complexity involved setting one up across less than a dozen machines?

I have never set up and configured a VPN. I was wondering what it takes to set one up across windows server 2008 servers. What is the complexity involved? How complicated is it to configure? Do I ...
0
votes
3answers
574 views

how to configure fedora nic to be up with no IP

I am building an IDS box with a dedicated sniffer nic which should have no IP. I can't seem to get the system to come up with no IP on the nic, it either uses DHCP or takes the same IP as the first ...
2
votes
3answers
2k views

Linux network configuration GUI frontend

I know that this is not how a true admin would do it, but this is for a small home network and for a person who's not very comfortable with the command line iptables configuration. There's a small ...
1
vote
1answer
5k views

Managing network interfaces on RHEL/CentOS with GUI + scripting (system-config-network)

We have two load balanced CentOS 5.3 webservers that handle a decent number (~20) of individualized shopping websites. The end result being that we have to have a separate secure site per product, ...
0
votes
3answers
597 views

Computer connects OK to the network, but applications won't access internet [closed]

Here is the scenario: The computer connects to my network, the DHCP server asigns to it an IP address, and sets every thing right. I can ping, trace and it resolves DNS. Here is the problem: I can`t ...
1
vote
2answers
632 views

Local area connection properties -> IPv4 displaying DHCP on while using static IP

This seems weired to me: After I installed Windows7 (7000) I've set IPv4 properties of my NIC to a static IP and DNS. But when I'm looking into the IPv4 properties of the NIC now, both IP and DNS ...