Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically.

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How to use two different ISP on same LAN with one Ethernet switch?

Sorry if same question is asked on Stackoverflow. I searched and tried some configuration but are not working in my case. I have a LAN with 6 machines which are on same network (each other can be ...
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19 views

Forcing server to server copy to use LAN and not WIFI and “Smart” SSH GUI utility?

I have a simple LAN setup consisting of 4 macs with the included ssh servers turned on (all on Mavericks/Yosemite) I regularly sort and move files between the ssh servers. I'm looking for a tool that ...
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0answers
22 views

OpenVZ can't reach the internet [on hold]

I have a vps running and it seems to be ok, but I am unable to access to internet. I am only able to access the internal network. What I want to do is give the vps a ip (access to the outside world), ...
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0answers
3 views

CoreOS on VirtualBox only works with one adapter at a time [migrated]

I'm trying to learn more about CoreOS. (I'm not using Vagrant, just plain-old VirtualBox.) So I created a disk using coreos-install. Unfortunately, I can't find my original cloud-config.yaml file, but ...
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0answers
15 views

Draytek Vigor 2860 multiple external IP-addresses

I've bought a DrayTek Vigor 2860 for my company network. And I'd like to use it for two VLANs with separated external IP's. I have 6 LAN ports on my DrayTek. For example: External IP-adres: ...
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12 views

IIS 8.5 links are showing local domain not ip [on hold]

I have set up IIS 8.5 on windows 8.1 as a development site but I need to let people in different office look at it. When they load it by going to my public ip address the initial html loads fine but ...
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2answers
32 views

Is there a way to control Internet usage on LAN?

I have a network with many client PCs. I have to block Internet access for some of the users and allow it for others. Is there a way that can control Internet access, or filter and allow based on MAC ...
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19 views

Not working persistent routes on virtual debian machines [on hold]

I am very new at this. Sorry , english is not my native language. I am not a network administrator or anything like that. My teacher assigned us a homework. The delivery date has already passed, but, ...
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0answers
41 views

Proper network configuration on WAN interfaces [on hold]

I am curious about how this configuration works. The final result (by me): When I ping from PC0 to PC1 I get a response. I left the RIP empty for each router and I could still ping PC1 from PC0. ...
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1 view

Network Vicinity View doesn't show agent managed PCs

Network Vicinity View in my SCOM only shows other network devices+management server, but does not show any agent managed computers, why is that? Or is it supposed to be like that and i'm missing ...
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0answers
46 views

Can iSCSI and Internet work on same NIC? [on hold]

I have a Synology RS815+ that supports iSCSI with 4 GbE ports. I have two Mac Mini's (2014) with built-in GbE and a TB to GbE adapter. All 8 connections are tied to the same switch, with client ...
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2answers
19 views

Does Windows Network Load Balancing require any specific ports to be open?

I have two Windows 2012 servers, joined in a Windows Network Load Balancing cluster. I have been trying to find how the NLB heartbeat message is exchanged between those servers (to make sure it will ...
1
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1answer
19 views

Does TCP's MSS hide a mismatched intra-LAN MTU?

I'm trying to understand how mismatched MTUs behave in a network. Suppose two hosts are able to talk to each other through an Ethernet-based network. The network and host A are configured for jumbo ...
3
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1answer
52 views

Connect two infiniband cards to each other without a switch

Is it possible to connect two Mellanox ConnectX-2 cards on two seperate computers to each other without a switch in between? I am just trying to learn to use verbs programming without having to spend ...
1
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0answers
22 views

What is the best way to configure an iDRAC/dell server in a public data center such that the idrac doesn't have to be exposed public facing

I have a server right now in a data center behind an OpenVPN using the client on the box to connect to the vpn server. I'm going to install the iDRAC and want to know how to best configure the ...
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32 views

Unknown device showing up in network scan

I need some help finding a device that has been showing up whenever I scan my network using Spiceworks' "Inventory" scan. I can ping the device, but nslookup returns a non-existent domain, and ...
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0answers
18 views

Slow download speeds from Debian server [on hold]

My server is connected to a network which allows for up to 75Mb/s down and up speeds. I have tested this on other computers on the same network with speedtest.net, and the speed is in fact 75/75. When ...
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1answer
35 views

PXE or other : deploy images on single board computers (SBC)

We have a few SBCs of various modeles (but a lot of freescale). When received, these SBCs are bare (no BIOS/U-boot). We generate linux embedded images with Yocto (using U-boot as bootloader), and we ...
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1answer
19 views

Proxmox: 1 NIC, 1 Public IP, unable to get WAN interface working in VMs

I have a computer running Proxmox, and it has 1 single NIC that is directly connected to internet and has a single public IP. Then, I have different VMs (KVM) running and one of them is pfSense. What ...
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1answer
27 views

NFS Server “outbound” bandwidth consumption

I need to understand about something in NFS (Server). Let say i have: Two Different Clouds (One Server on each) One NFS Server One Apache Server (as the NFS Client) with a NFS Mounted Directory ...
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1answer
36 views

Infiniband cable

What is the difference between an active and a passive cable? What is the difference between QSFP and QSFP+? Given the choice between copper and fiber, for a very short distance like 3 feet max, is ...
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1answer
25 views

configure two routers to one T1

We have a router hooked up to our T1, and the router went down the other day and caused our phones to go down so i had an idea to use a backup router. I know very little about networking. Is it ...
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1answer
30 views

PXE boot to ISO file

I have an ISO file for an HP diagnostics boot. Rather than burning a CD for every single computer I want to run diagnostics on, I'm wondering if I could load this file onto a server and allow the ...
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1answer
6 views

reg query inside unknown keystring

Is there a way to reg query into an unknown keystring? What I mean by this is if I do reg query HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ the entries will ...
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26 views

Active directory creates network issues

I have an OpenStack virtualization environment, where I created 3 VMs using the same Windows Server 2012R2 image. Each machine is syspreped after initial deployment. My goal was setting up a simple AD ...
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2answers
34 views

Finding the server that blocks port [on hold]

Is it possible to find which server is blocking one specific port using unix tools (on a complex local network)? I know the server to which I want to connect and also the port. But something seems ...
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3 views

How to connect to my web server? [migrated]

I have implemented a simple web server as a solution to a course assignment and I want to connect to this web server over the internet. I've set it up to listen on port 22881 and configured my router ...
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1answer
45 views

How can I configure multiple tap interfaces for a single KVM virtual machine

I am trying to setup a VM using Linux KVM for a F5 BIG-IP VE deployment (used in a lab) ...
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0answers
30 views

How can you calculate IP address subnet ranges? [duplicate]

If you're given: Number of needed subnets: 2 Network Address: 195.223.50.0 I can answer the following: Address Class: C Default Subnet Mask: 255.255.255.0 Custom Subnet Mask: 255.255.255.192 ...
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7 views

problems triggering a build in Jenkins with bitbucket-plugin

I installed Jenkins using Turnkey-Linux Jenkins-VM, running in a virtual server environment (Windows host in Virtualbox) with a local private IP address and operating on port 80. The development team ...
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2answers
49 views

Network get very slow at noon everyday [closed]

My network gets very slow every workday starting at noon until around 1 PM. No updates are planed during that time. What could be the possible reasons why this is happening?
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43 views

Creating a Network Diagram with .pcap [closed]

I have a Wireshark .pcap Capture of around 500k packets and I would like to enumerate a Network Diagram with all the Routers, Switches, PCs etc. Is there a tool that I could use to automatically ...
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27 views

Seperation of network traffic\routes

In a lab environment I have 4 VLANs: VLAN10 -> Management (192.168.10.0/24) VLAN20 -> Service (192.168.20.0/24) VLAN30 -> Administration (192.168.30.0/24) VLAN50 -> Public (192.168.50.0/24) ...
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1answer
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why do all softphones fail to authenticate after receiving 401 unauthorized from Asterisk?

When I attempt to connect to the Asterisk server from CSipSimple, over a Cisco router, on the same network, Asterisk logs show the attempted connection: <-------------> [Mar 23 20:01:34] ...
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1answer
25 views

Catalyst 3560, making an admin only port? [on hold]

Okay, so I'm completely new to this networking stuff. I have an assignment and it's stumping me. I have a choice of using either 2950, 3560, 3750 devices. The assignment: "Make sure that no one can ...
1
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1answer
31 views

Route programming to allow a separate subnet on a 2nd NIC to connect through the 1st NIC's internet connection [on hold]

Good morning folks, Networking is not my strong suit, and after reading up on route programming and IP routing, I am now thoroughly confused and in need of guidance. I have a Windows 7 Pro machine ...
3
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0answers
35 views

Procurve script/automation

This may be a stupid question, but I'm normally not a network admin, but circumstances have me there. I'm trying to disable down ports on a switch, but have a boatload of them, I'd like to configure ...
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31 views

configuring two T1's

We have two NetVanta 3200's. One is plenty for us, but the other is just a replacement kept in a box. Recently it started having some problems and it caused our phone servers to go down for about 20 ...
6
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1answer
328 views

Are CSU/DSUs still used for modern equipment?

My understanding is that CSU/DSUs are no longer used anymore for modern equipment because cable connections like Ethernet come with fixed bit rates. Is this true? Do correct me if I'm wrong.
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17 views

Which network type for RHEL6 in vmware workstation should be selected? [closed]

I have windows7 in that I have installed a Vmware Workstation 10. Inside the VM I installed rhel6. I want to configure a (static) ip address on the rhel6, and it must be able to access internet as ...
-1
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0answers
12 views

Bonjour protocol running on VMWare fusion not discovering services over host's local network [closed]

I have installed Windows 8.1 in VMWare on a Mac book. The windows installation has bonjour running. I want bonjour to find services published over the local network that the host is connected to. Can ...
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0answers
32 views

Home network: Google thinks I'm in Korea from every device [closed]

I'm not sure when this started happening but every device (e.g. laptop, phones, tablets) at home, Google thinks I'm in Korea when I'm actually in Canada. I tried using http://www.geoiptool.com and it ...
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votes
1answer
35 views

Proper network cabling tips [closed]

Sorry if this is not the correct site. I am really not very knowledgeable on network cable installing (so sorry if I say something very stupid here), but we are moving to a new office and want to do ...
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2answers
37 views

Windows Server 2008 - Local Area Connection disappeared from ip interfaces

I have a Windows Server 2008 R2 machine. Local Area Connection isn't working anymore, the interface exists but it doesn't as an ip interface. C:\Windows\system32>netsh int show int Admin State ...
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0answers
31 views

How do I make a computer lab? [closed]

I realize the absurdity of the question. A local art center wants to offer classes that use computers. They happen to have near 20 IMacs hanging around that the high-school has given them. The room ...
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0answers
14 views

How to set up proxy rules on my Debian router? [closed]

Here I have a Raspberry PI working as a wireless router, and I have a working proxy server, which works fine with a client, and some setup with my browser's proxy plugin. I wanna program the proxy ...
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20 views

What are the network prerequisites for Windows Azure Pack

I have followed many articles to install and config windows azure pack distributed, But every time I finish configuring everything, the azure pack is not working and give me different errors, seams to ...
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2answers
72 views

Client computer(Windows 8.1 Pro) unable to connect to a domain(Windows Server 2012)

I am unable to connect a client pc to a domain controller which is a Windows Server 2012 Datacenter. I have tried connecting it : Through the system menu in Control Panel Putting all the ...
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14 views

Route 2 external IP ranges using pfSense

I have pfSense running on some hardware routing my /27 block of IP addresses assigned by my ISP. I asked for and got another /26 block that I want to send all of the block to a single server (it will ...
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2answers
32 views

Is there a way to block ALL inbound/outbound traffic going outside of a LAN with iptables?

As the title says, I'm just looking for a way to disallow any traffic on ANY port unless it's going to a local IP address (192.168.1.*).