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

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Fast download speeds, slow web page load [on hold]

I first noticed I had an issue when I couldn't load up my website. I received a "forbidden" error from Apache even though I run Nginx. I tried to connect to the server remotely, but I got a ...
1
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0answers
16 views

Multi IPs on a Xen VM with bridging

While I am fairly new to XEN (running under Ubuntu 14.04) I've not had any real issues until now. I have set my networking using bridging and that has worked well for many different machines until ...
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11 views

Filter Traffic Between Virtual Machines

I have a machine with Fedora 21 which acts as a host system for two virtual machines. The VMs are made up using QEMU/KVM/libvirt/virt-manager. One VM is running a webserver, the other VM acts as a ...
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27 views

DNS not working with Ipv6

I'm trying to configure bind for ipv6 protocol.I have added the entries to the zone and configuration files but still the ipv6 IPs are not returned when i try for nslookup.Can someone guide me to ...
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1answer
21 views

iptables 'rewrite' requests on a certain port?

Alright, my situation is basically this... I have a box that's acting as a router, with 2 interfaces, eth0 and eth1. eth1 is my uplink, that is it is the interface through which the box is obtaining ...
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2answers
50 views

Exposing private network ip

I have the following setup: Box A eth0 - 192.168.1.101 eth1 - 10.10.2.1 Box B eth0 - 10.10.2.2 Box A has internet access through eth0. I want Box B to be visible on the 192.168.1.0/24 network, so ...
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0answers
52 views

Adding extra IP to NIC causes connectivity issues for main IP (Win Server 2012 / IIS)

I am experiencing a very odd situation: I have set up 8 IP addresses in a single NIC (plus it's main IP) for use as a web server - and have 8 websites happily running in IIS8. (The server in ...
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18 views

RDP connection gives nca_s_fault_access_denied [migrated]

I have 2 PCs on the same network with fixed IP addresses and firewalls turned off. Windows 7 Professional and the service running on a Windows 7 Enterprise editon. System running with DCOM service. ...
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2 views

How to set up a simple Cisco ISG config for controlling internet access

First off, here is my config so far. http://pastebin.com/fV2NGCE2 I've gone through a few guides online and the 15.2s manual and the xe3 manual for Cisco's ISG (intelligent services gateway) and ...
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5 views

VMWare Fusion 7 - Troubleshooting Networking issue [on hold]

Im running fusion on my OSX 10.10 (Yosemite). My VM is a Win 8.1. Because of the "developer" nature of this VM, I need to be able to access services it provides (eg: IIS+Web API) from other network ...
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12 views

Openwrt bridging issue between wireless and ethernet port [migrated]

I've this scenario: an AP connected to the STA wirelessly, the AP is a DHCP server I have following configurations in /etc/config/network of the AP: config interface lan option ifname 'eth1 ...
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1answer
41 views

Email storage server - NAS or SAN? [on hold]

I'm looking for storage server that could store ~34TB (34 SSD disks of 1TB) of emails. I'm thinking about two NAS QNAP storage servers, but I'm not sure if it's OK to use NAS instead of SAN. Any help? ...
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3answers
2k views

Is it possible to tell whether two IP addresses belong to the same server?

Given two public IP addresses and the knowledge that are both on the same /27 network, would it be possible to determine from a remote location (i.e. different country) if they belong to one or two ...
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1answer
36 views

Setting a default gateway which is on a different subnet

I work in a company which uses 3 subnets, 10.0.0.0/16, 10.1.0.0/16 and 10.2.0.0/16. The 3 subnets are connected using layer 3 switches (10.0.100.200, 10.1.100.200, 10.2.100.200), all of the machines ...
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31 views

How to build a Raspberry Pi CubeSAT? [on hold]

Guys I want to build a demo Raspberry Pi CubeSAT setup. This thing I need to setup on my home-lab to research on TrafficSqueezer WAN optimization over CubeSATs. Does anyone did CubeSATs or experience ...
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1answer
26 views

Identify individuals behind SLAAC addresses

We're operating an IPv4 network (on ethernet & Wifi) in a student dorm with ~200 users and want to deploy IPv6 in the long term, with stateless autoconfiguration on a single /64 prefix. ...
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2answers
26 views

Same number of clients - multiple WAPs vs Single WAP

We purchased a device that acts as a WAP through which you can connect a mobile device and share its content onto a projector or tv. My question is - if we have multiple deployments of this device, ...
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19 views

Avaya 4850 GTS & VSP 7000 - setting up a fibre trunk, no MLT

I'm a junior network/sys admin, and I'm stuck (and my seniors aren't sure what to do). I have a VSP 7000 switch which is a core switch. And a 4850 GTS switch which is like access switch. The switches ...
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1answer
16 views

Running OpenVPN on Xen node causes guest VM to view all inbound connections as originating from the node IP

I have two node servers running Xen 4.2 -- I'll call them Node A and Node B. Node A is running OpenVPN as the server. Node B is running OpenVPN as the client. Both nodes host a number of Xen guest ...
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4 views

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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7 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
54 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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2answers
30 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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21 views

size of Network Packet in linux [closed]

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
44 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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74 views

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

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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18 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 ...
3
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1answer
43 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 [closed]

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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12 views

Internet is not working without proxy [closed]

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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2answers
53 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
30 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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25 views

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

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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14 views

Xampp localhost to domain name accessed from network [closed]

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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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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0answers
20 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 ...
3
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2answers
113 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, ...
1
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2answers
36 views

Connect multiple times to the same wifi network [closed]

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?
0
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0answers
9 views

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 ...
2
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3answers
46 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
19 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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33 views

2NIC's with 2 Gateways [closed]

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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0answers
32 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 ...
2
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0answers
34 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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22 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 ...