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

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Debian Secure Network

I have an industrial PC with 3 Ethernet ports (RJ45, 100 MB/s). I would like to designate one as an incoming internet connection (from the company), and the other two on a private network. The private ...
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1answer
21 views

Cant RDP if VPN IPv4 uses default gateway on remote network flag

Thanks in advance for any help. I apologise if anything doesn't make sense. I haven't done any professional networking before, only studied it at uni 3 years ago and everything is a little blurred. ...
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1answer
14 views

Simulate WAN / Route Between 2 Virtual networks (Vmware)

i am in the process of doing some Labs on VMWARE ESXI 5.5, i am currently testing replication between 2 AD sites, i have set up Site A containing 2 DC's and want to setup Site B Contains 2 DC's as ...
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1answer
30 views

Assign more than one IP address to DNS [on hold]

i have create my own DNS with one ip address but i want to give multiple IP address to that DNS. is it possible to assign ?
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1answer
13 views

Should you use secondary IP configuration to configure applications in EC2?

I am using DHCP to assign primary IP addresses in a subnet within a Windows Amazon Web Services EC2 instance To avoid issues where the boxes are rebooted and the DHCP address changes, I have assigned ...
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1answer
8 views

enable java app to establish http connection under network of VPN.

Some relative question http://stackoverflow.com/questions/17170980/connect-to-http-server-behind-vpn-with-java has already asked in Stack Overflow while I don't still have a solution since this should ...
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1answer
32 views

IP Network Best Practice

On my On Premise network we use IP Span 172.17.101.0-172.17.103.254 I should now connect our Windows Azure network to the On Premise network using VPN. Is it okay to use IP Span 172.16.1.0 in the ...
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18 views

SNMPv3 - How can I attach an OID to a variable?

I am working on a project using pySNMP and I think I'm having a conceptual issue. Its my believe that I'll somehow be able to use a MIB to make sense of the OIDs on the manager side while on the ...
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0answers
15 views

virtualizing a switch for vyos test lab [on hold]

first of all, sorry if this is not the right site to ask my question, im very new on networking and stack exchange has a lot of sites and i don't know where does my question fit (if it fits) i have to ...
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0answers
14 views

Centos and Strongswan

I'm trying to implement a strongswan solution for a site to site tunnel between me and a third party vendor. My tunnel establishes fine between myself and the vendor however I am wondering if this is ...
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3answers
64 views

Converting VMware VMs to Hyper-V

Our company is looking to try out Hyper-V as a server virtualization solution so I am looking for the most efficient way to test everything out safely. My plan is to make a snapshot backup of each of ...
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27 views

Preparing CentOS 7 as a virtual machine

I've removed the HWADDR from ifcfg-eth0 and touched /.unconfigured, but when I restart the virtual machine, HWADDR is not added back to the ifcfg-eth0. Is there something else we should be doing?
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2answers
19 views

How to pinpoint why a specific ressource (image or library) slowing down page load

We have a small network (maybe 15 users at top business hours, around 30 devices) managing internet connection and phone lines. The primary use of the network is for users to access the web based ...
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1answer
40 views

very long “connecting” in chrome using ipv6

A connection to an ipv6 subdobain www6.example.com takes very long. In chrome the net tab shows 20s spend in "connecting". All other times are much faster. However only the first two connections are ...
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2answers
98 views

Managing IPv6 rDNS

Still very new to IPv6 and I talked to my datacenter and they do not do rDNS for IPv6. Unfortunately we currently do not support rDNS for IPv6 allocations. We can however delegate the IP block ...
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1answer
18 views

What causes “SYN to LISTEN sockets dropped”?

A quite busy proxy server has lots of "SYNs to LISTEN sockets dropped". I learned one cause could be a too small backlog size. But in that case the "times the listen queue of a socket overflowed" ...
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0answers
15 views

how to use public ip in my private network [migrated]

I'm trying to use public IP address in my private network. In a short, how to set public IP, which is different to endpoint IP of my private network, to my server in my private network? Is other ...
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2answers
39 views

Port forward with iptables

I got lo (127.0.0.1) and eth0 (172.17.0.8). I want to redirect packets that land on 127.0.0.1:80 to 172.17.42.1:80 (route from eth0). I tried iptables -t nat -A OUTPUT -p tcp --dport 80 -d 127.0.0.1 ...
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1answer
26 views

Ubuntu / node.js dropping incoming requests [on hold]

I am getting dropped requests on a node.js server. I have simplified the test case to the point that it must be a problem with system setup. I am a developer and have very little experience with ...
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0answers
24 views

triple vlan configuration on cisco swith is it possible [on hold]

I have 3 ports fa0/1, fa0/2, fa0/3 fa0/1 is connected to paging system ( public address vlan) fa0/2 is connected to paging system controller (public address vlan) fa0/3 is connected to IP Telephone ...
-1
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0answers
19 views

Access private KVM from public KVM [on hold]

I used qemu/libvirt to create two virtual KVM machines on my host. One with a public accessible static IP (PubVM with P.P.P.P) and one with private IP (PrivVM with 192.168.A.A). All machines have ...
2
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1answer
49 views

Where to start with diagnosis of dropped network connectivity on Debian?

We have a number of Xen virtualised servers, all running Debian 6 64bit. We are having an intermittent problem where occasionally a server will stop responding over the network. When this happens we ...
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0answers
4 views

Network interface configuration on Debian 6 (No DHCPOFFERS received) [migrated]

I am trying to configure an interface to allow internet connection on a home server which runs Debian 6 x86. The server is behind a router which has DHCP enabled. The router IP is 192.168.1.1 with ...
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0answers
25 views

Really slow copying a file to a win 8.1 pc over LAN, no other network issues [migrated]

I have a windows 8.1 pc thats being running fine for ages. Suddenly it's unable to play videos from a network share. Digging into it I've found the following: Copying a file from any of the three ...
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2answers
43 views

ESXi Hypervisor - Cannot get multiple VMs to connect to Internet

Pulling my hair for past few days over this. Can some VMWare ESXi expert help out? I recently decided to give ESXi 5.5 a try. Installed it, got connected through vSphere client, and created few ...
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0answers
13 views

Hyper-v guest network priority

I have the following configuration: 2 Hyper-v hosts connected using a Dell 1gb switch: Host 1 vms: domain controller which also server as dns server (DC01, ip: 10.2.2.5) fileserver (FS01, ip: ...
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1answer
65 views

Folder Redirection on Domain Controller Win Server 2008

This is a long post with a few questions in it. They are all related to the same issue though, and solving one or the other will probably solve the others. I did look on superuser for similar ...
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0answers
27 views

How to routing on virtual routers on windows? [on hold]

Hi I have two virtuals routers: one with connectify (192.168.246.1), other with netsh hostednetwork(192.168.173.1). I have two other computers connected on routers (192.168.246.50, 192.168.173.172). ...
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0answers
49 views

Slow site, most time spent Blocking/Connecting [on hold]

My site is based on user-submitted content, meaning that users can upload images, etc. The problem is, my website loads extremely slowly on first load (before it caches). For example, here is the ...
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1answer
38 views

NTttcp shows slower throughput on loopback (127.0.0.1) than on network

I am using NTttcp to find a baseline for what throughput I can expect between a client and server on windows. When I ran the client and server on two different machines on our LAN I got the following ...
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0answers
52 views

Why does my server gets requests for domains that are not mapped to my IP

As title states ... Why does my server (nginx) gets requests for domains that are not mapped to my IP? I've split my nginx logs to create a log file for each website that it processes and i've ...
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0answers
23 views

Remote desktop connection to server running Hyper-V, disconnects when VM uses the network [on hold]

Problem: When ever the VM connects or uses the network, my RDC and other services disconnect. Setup: I have a remote server running Hyper-V. I use RDC to manage the remote server. On the remote ...
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1answer
42 views

Map drive from windows to linux file share [on hold]

What I would like to do is to fire up a linux based cloud computer and be able to map a network drive from a local windows computer to this remote linux cloud computer. Is this possible?
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1answer
33 views

iptables: service per physical interface

I have a vm on which I'm trying to configure (unsuccessfully) one service per physical device - i.e. ssh open only on eth0, http only on eth1 and ftp only on eth2. This has to happen regardless on the ...
1
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1answer
30 views

Why do I see so many ssh packets in only a couple seconds?

I am learning how to use tshark so I can better understand networking. As a user the protocol I most often use day to day is SSH. So I thought I'd start a capture filter on ssh packets on my server ...
3
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2answers
191 views

tcpdump truncates to 1472 bytes useful data in UDP packets during the capture

I am writing an application which work with network. To perform some tests I need to reproduce the flow which I had a day before. But at the same time it is not allowed to stop the current working ...
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0answers
26 views

Good Internet connection, but websites load slowly or not at all and internal web server presents same issue to outside users

Lately, users in my organization have been having problem accessing web pages. The browser status bar will say "Waiting for [site]" or "Downloading...", but pages never load, or only load partially ...
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29 views

Multilayer LACP

I have a network switch that is limited to 2x1Gb/s LACP teaming, however have a file server with a 4x1Gb/s network interface. What options do I have to aggregate all available bandwidth without ...
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0answers
12 views

Route Windows application to specific network interface [migrated]

I have two connections (one wired, one wireless, if relevant). One connection passes thru a proxy (which is not under my control) and is domain controlled. The other is a simple wireless connection ...
-1
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0answers
22 views

Connect OpenWRT router, root server and roadwarrier via VPN - which vpn technology? [on hold]

I want to connect a private LAN (connected over an OpenWRT router via DSL), a root server on a hoster and different roadwarrior together to one VPN. On the root server (Debian Wheezy) I´ve installed ...
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0answers
4 views

shrew soft vpn client routing to another network

I have configured Shrew soft VPN Client on Kubuntu 12.04.3 and is connecting to CISCO RV042. The CISCO router is connected to LAN 10.66.11.0/255.255.255.0 and also connects to another CISCO router at ...
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0answers
23 views

How a client knows which DHCP server to connect? [closed]

I am a Computer Science and Engineering student. My College has a well configured DHCP server which gives IP address to all its clients (students PC). We connect to internet via Ethernet cable. Now ...
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1answer
22 views

Setup network between 2 computers connected using wifi [closed]

In my office I have a WiFi Router that allows 2 computers to connect to Internet. I have 2 questions - How can I create a network between these 2 computers for file sharing? Can I access SQL server ...
-1
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0answers
10 views

How to use iptables and ebtables to limit qemu access to a set of IPs? [on hold]

I want to limit the access of a VM (backed by QEMU) to a few IP address. The VM has a private IP received from dnsmasq. The guest is connected to outside through a bridge. To limit the access, I need ...
4
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3answers
89 views

Can't access Exchange OWA from Wireless Subnet - Firewall rule?

The Problem The issue is that I can't access port 80 (or 443) on the Exchange server, unless I add a blanket rule to allow all traffic from the client to the server's subnet. If I add a rule to ...
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2answers
57 views

Why would a public subnet be used here? [on hold]

I'm a former DBA/Developer who now handles all IT aspects in a new role, more by chance than design - you know, "he used to be in IT so obviously he can handle everything" type of thing. I've set up ...
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1answer
23 views

KVM Isolated network between host and guest fails after few hours

I have a KVM CentOS host with several CentOS guests. All of the guests are using a bridge for network communication. The guests have been up and operational for several months and work properly. The ...
-1
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0answers
20 views

Internet not working on server and getting system lacked sufficient buffer space or because a queue was full [closed]

My ASP.NET and SQL Server 2012 application is running on Windows Server 2008 R2. Suddenly, my internet on server stopped working and my application throwing, An operation on a socket could not be ...
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0answers
18 views

<SOLVED>IIS7 HTTP Redirect not working correctly for my use

quick overview of our network. One WAN IP, two win 2k8 web servers. Initially one was for our public sites, the other was for our internal sites. Using a router as a firewall / NAT device. We now ...
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0answers
11 views

Realtek dongle not working on beaglebone [closed]

I have a Beaglebone Black and Wifi dongle that refuses to work with it. lsusb Output: root@beaglebone:~# lsusb Bus 001 Device 002: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN ...