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

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filtering in traffic shaping

I am using a traffic shaping by HTB and IPhashing filter in an organization with 10500 users. In my project i want to control bandwidth per IP so I created for each IP an individual class. HTB ...
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4 views

How to make TCPFlow to not store package body?

Is it possible to configure tcpflow to store only package headers without package body? My log simply explodes in production.
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5 views

New HP Network Printers Problems with Barcodes [migrated]

a few days ago, i replaced some old HP Laserjet 1300 printers with new HP Laserjet Pro 400 printers. As manufacturer, driver and settings are the same (i checked it multiple times) i didn't see any ...
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3answers
34 views

Scanning network devices by mac address

I work in the security devices industry and most of my work relates to IP cameras. Each camera manufacturer has their own software that scans the network for their cameras and gives details about ...
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1answer
10 views

Use a specific outbound IP with Docker

I have 3 network interfaces: docker0, eth0 and eth0:0 (alias). auto eth0 iface eth0 inet static address 1.2.3.4 netmask 255.255.255.0 network 1.2.3.0 broadcast ...
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10 views

X-Latency-Trace HTTP Header field

Searched RFCs and googled on the header field X-Latency-Trace field but could not find anything. The Wireshark interpretations says: X-Latency-trace: [STM3] tot 3062 pip 2833 jc1 255 jc2 0 que 0 ...
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20 views

size of Network Packet in linux [on hold]

I would like to understand what is the default network packet size for an inbound and outbound in linux. What it has to do with MTU on the nic. Does a NIC speed determine the packet size or kernel ...
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1answer
35 views

Server network setup with 2 NICs

We have a debian server server with 2 NICs. The Server should be configured with 2 IP addresses, one internal address for the communication in our LAN, and one public IP accessible from the internet. ...
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52 views

Why do I keep getting “403 Forbidden - nginx/1.6.2 (Ubuntu)” when visiting any of my sites? [on hold]

Why do I keep getting "403 Forbidden - nginx/1.6.2 (Ubuntu)" when visiting any of my VPS hosted sites? I have recently changed to nginx installation from Apache2 on my Ubuntu setup on my ...
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11 views

Xen: network between dom0 and domU does not working, while network between particular domUs does

I am unable to establish communication between domU and dom0. I have two domUs and they are able communicate between each other. Dom0 is connected to Internet. I just need network between dom0 and ...
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1answer
36 views

How to test iptables settings by port scanning?

I want to test my iptables and prove that it only allows traffic for given Protocol / Port - combinations. How I can use as a target for a port scan?
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2answers
24 views

Discover webserver on a network [on hold]

I am building a small linux box, which will be running a webserver only. The purpose of this little machine is to be put into a small, temporary network at a temporary location with no access to the ...
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Internet is not working without proxy [on hold]

Internet is not working without proxy, but its works with proxy. What can be the issue for this problem.? I need to connect without proxy. Please let me know how to solve. Thanks in Advance.
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1answer
31 views

Adding a virtual NIC to a 2008R2 server makes internet unreachable, why?

I currently have a Windows Server 2008R2 box with a single physical NIC. For what I want to do I need two network adaptors in the box. To accomplish this, I added a legacy hardware device "Network ...
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1answer
26 views

Linux kernel behavior when dealing with colliding subnets

I'm using openconnect to connect to my office VPN. They push some pretty crappy/aggressive routing rules allocating ALL of the private IP address spaces >.< After I connect to my office VPN, my ...
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17 views

Unable to set a bridge over bonding on Debian

I have a Debian 8 Jessie machine with two interfaces (eth0 and eth1) bonded in balance-rr mode (aka 0). It works smoothly, but when I try to set up a bridge on it, it doesn't work. My ...
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24 views

How to sandbox internal IPs on the same subnet with one to one NAT [on hold]

I am curious as to what technologies are employed to accomplish this with vendors that provide this service. What kind of LAN subnet restrictions can be imposed so that 2 hosts on the same internal ...
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13 views

Xampp localhost to domain name accessed from network [on hold]

I was able to change the localhost URL of Xampp to a domain name. Example: domain.c1. However if anybody of my team wanna access Xampp the only way is through IP however I need them to access it by ...
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1answer
23 views

Utilizing A Secondary IP On A NIC In A Windows Cluster

RELEVANT INFORMATION I have a windows cluster with 3 nodes in it... Node1 Node2 Node3 I have 4 NICs on each node... NIC1_Host NIC2_Virtuals NIC3_Cluster_HB NIC4_Live_Migration This is the ...
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14 views

Can't connect to Windows Server 2012 Virtual Machine in Red Hat 6

I have installed a WS2012R2 virtual machine using KVM on Red Hat, It has a bridge connection, Both (Host and Guest) have public IP addresses, both have internet access, both can ping any ip address or ...
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19 views

Add a second bridge to a virtual machine

We have a ubuntu-12.04 host running another ubuntu-12.04 virtual machine with kvm virtualization and bridged network interface on eth4. This network allows the virtual machine access to the outside ...
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15 views

Disabling IPv6 on a specific network adapter without UI [migrated]

My problem is similar to the one described in How to disable IPv6 on a particular network interface using Server Core? - just on Windows 7. The answers seemed helpful at first, but are not fully ...
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2answers
110 views

What is the proper way to connect cables from a patch panel to a switch when you have more ports on the patch panel than the switch?

We're in a situation at our new building where we have 58 drops but only 48 ports on our switch. Roughly 40 of our drops will be in use, but it's a random selection ranging from 1 to 58. Typically I ...
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2answers
14 views

OpenVPN won't assign static IPs

I have OpenVPN setup and running correctly. The problem is I want to assign static IPs to certain users on my VPN, so they always get the exact same IP every time. My setup is for PAM authentication, ...
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2answers
35 views

Connect multiple times to the same wifi network [on hold]

Is it possible to connect multiple times (with different MAC addresses) to the same wifi network with just one network card? Is there already a tool to do this?
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Getting PXE-E78 error when trying to network boot

When imaging a laptop or desktop through our network, I keep getting these errors. The fix I've found is starting Windows up before I throw up our company image and doing a renew/refresh in cmd. Any ...
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3answers
42 views

Filter network traffic through 2 WANs depending on IP?

I've searched thoroughly in an attempt to find a similar question here, but aside from finding information about pfSense (which appears to only support 1 WAN?) I can't find much else... Our current ...
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1answer
18 views

Network scanning scope limited in Windows Server 2012

What I need ?: View all the computers of the network neighborhood (including all network segments, 192.168.1.x , 192.168.2.x , 192.168.3.x , etc) What is my problem ?: When I open network ...
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30 views

2NIC's with 2 Gateways [on hold]

I have this setup: 6 machines with 2 NICs each each machine has one NIC connected to 192.168.1.0/24 through a hub. One of the machines is the gateway (192.168.1.13) which has NAT and masquerading ...
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30 views

Can an improvised UTP cable from multiple CAT3 cables be improved? [closed]

First of all, a disclaimer: this is a total hack job, and I'm only a networking DIY enthusiast. I live in a student housing cooperative, and the two houses it comprises have an unused phone network ...
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27 views

Iptables content blocking firewall

I have setup a firewall with iptables to ratelimit connections based on content. The following is an example of one of my rules that stops wordpress bruteforce attacks. `iptables -A INPUT -p tcp -m ...
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20 views

Slow connection speed in network

I'm trying to setup a NFS folder between 2 servers located at wholesaleinternet.com. The issue is that I have really slow transfer rates between my 2 servers. I started a support ticket but they ...
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1answer
39 views

Router not blocking https

We have a Netgear WNR834B wireless N-router. The problem is that its not blocking certain https sites with its content filtering and most said there is nothing much you can do that cant be bypassed ...
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20 views

Router suggestions for small business capable of blocking https and/or with netflow [closed]

I'm new in network management. I need a new business router (15 - 50 employees), preferably cisco because im much more familiar with it. Our current router is a Netgear WNR834B wireless N-router. But ...
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0answers
9 views

Maximum throughput using Go-Back-N protocol [closed]

what is the maximum throughput using go back n protocol if MTU is 1000bytes, RTT is 100ms and link rate is 100Mbps for window size 1pkt?
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1answer
25 views

Access OpenVPN client network from server

I have setup an OpenVPN connection between a Windows 2012 Server and an Debian Linux machine. The windows machine is the server and the linux machine is running openvpn as client. I can ping and ...
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11 views

binding issues with multiple web services

We are running a continuous integration server with the following software: Windows Server 2012 (AWS EC2 Instance) TeamCity 9.0.3 Youtrack 6.0 Collabnet Subversion Edge 4.0.14-4110.144 Octopus ...
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1answer
28 views

Locating bandwidth bottleneck

I am using FFMPEG to encode a video stream that is sent to a server at EC2 through ELB. I was only able to get about 2Mbps/15fps throughput to the EC2 instance. Through process of elimination, I ...
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15 views

How to connect custom network namespace to root network namespace?

I would like to connect the root network namespace to my custom network namespace in my Ubuntu box. Here is my network diagram: Basically my custom network namespace is the one who control the vm ...
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0answers
13 views

Dual wan ubuntu router [closed]

I would like to configure a ubuntu server with two ISP and one lan with two network; say 192.168.1.1 and 192.168.2.1. 192.168.1.1 n/w should route through ISP one and 192.168.2.1 n/w should route ...
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4answers
56 views

Scanning Monitor Models in my office [closed]

Does anyone know a method on how to run an inventory scan of all the monitors/displays in my network/domain? I need to go around the office and write down the model of each monitor, and I wanted to ...
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2answers
27 views

Windows add route between two NIC card Windows 7 [closed]

I have connected two PC_1 and PC_2 as below in windows 7 machine PC_1 (Intf1 - 1.1.1.1) --------- PC_2 (Intf1 - 1.1.1.2) PC_1 (Intf2 - 2.2.2.1) --------- PC_2 (Intf2 - 2.2.2.2) (Intf1 and Intf2 ...
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26 views

Remote Desktop Network Capacity Planning [closed]

We're looking to some sort of official guidance on RDP Network Capacity planning (preferably from Microsoft), but we're coming up empty handed. We've run RDP for many years, and have quite a bit of ...
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1answer
33 views

How the firewall is allowing Facebook requests to bypass itself?

I've a McAfee Firewall configured at my workplace. It actively blocks all the requests for websites like https://www.Flipkart.com https://www.Amazon.com https://www.Facebook.com I's playing ...
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0answers
18 views

Connected to Internet but can't load certain page [closed]

For some reason I can't connect to a certain site...I've checked whether it's up or not by searching for the "is a website down" test and the result said the site I wanted to go to was UP. I can ...
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1answer
29 views

Network Config: Difference between Windows and Debian

We have a so called "LAB"-Network(VLAN). The Switch and Firewall are configured to allow access from the ip 10.150.151.1 (Windows Client in LAB) and 10.150.151.10(Debian Client in LAB) to a mail ...
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1answer
30 views

Select source IP on windows server 2012 with multiple IPs on 1 NIC

I have searched a lot for a solution to this case but I couldn't find any. So, any help would be appreciated. I have a windows server 2012 with 1 NIC having 2 IPs bound to it 37.188.120.8 and ...
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3answers
192 views

Should I use link-local addresses where a non-routable, internal IP address is required?

I have a network appliance which contains some load balancing features - in my design, these features are only for use internally within the appliance. Nothing should EVER speak to them externally ...
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2answers
32 views

Setting up a network for a Host Server and it's Guest OS

Is there a standard as to how one sets up networking on a Server Host that will have virtual servers within? In the past I've used virtualmin and set up the nic to have multiple alias such as eth0:1 ...
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0answers
19 views

Setting up a new DMZ for Web Servers

When it comes to security, VLAN ACL's, firewall DMZ policy and the like I am a Newb. So any help will be appreciated. We are trying to architect our network to place all of our web accessible ...