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

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0
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1answer
27 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 ...
0
votes
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 ...
0
votes
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 ...
2
votes
1answer
52 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 ...
2
votes
2answers
1k views

Network connection to Firebird 2.1 became slow after upgrading to Ubuntu 10.04

We've got a setup that we're using for different clients : a program connecting to a Firebird server on a local network. So far we mostly used 32bit processors running Ubuntu LTS (recently upgraded ...
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votes
0answers
25 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 ...
2
votes
3answers
927 views

How to speed up Drupal 7 with remote DB (not DNS resolving)

we have Drupal 7 on Ubuntu LTS virtual machine (VMWare) with MySQL 5.1 server on the same physical server, but on a different virtual machine. The Drupal website is currently under development, ...
-1
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0answers
20 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 ...
11
votes
13answers
20k views

How to discover the MAC address of machines in a network?

How do I discover the MAC address of machines in a network? I need to discover the machines that are available just with only BIOS installed (no operating system). And I need to find the MAC address ...
3
votes
1answer
67 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 ...
1
vote
2answers
48 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 ...
0
votes
1answer
791 views

Redirect some specific traffic to a different gateway

I have two gateways with different ISP, one of them defined as default for the LAN user and the other ISP used as the default for the Servers and VPN traffic. This is done using regular routing tables ...
18
votes
6answers
23k views

What are the implications of having two subnets on the same switch?

Can anyone tell me what some of the implications of having two different subnets on the same switch would be if VLANs are not being used?
1
vote
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 ...
-1
votes
1answer
67 views

F5 BigIP limiting the amount of sources able to connect to a virtual server

In an F5 bigIP LTM with sw version 11.4.1, is it possible to have multiple sources addresses for a virtual server? The objective is to limit the number of sources from where the virtual server can be ...
1
vote
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 ...
0
votes
2answers
10k views

Fortigate 200A firewall CPU high resource usage

This morning I'm receiving complaints from several end users that saying their whole department network are slow and have intermittent. Therefore I've checked our firewall to see whether if something ...
2
votes
1answer
70 views

Openstack Single Physical Network

I am trying to deploy openstack grizzly on a 12 node cluster. I want to use the xen hypervisor. I currently have xenserver installed, and I have 3 virtual machines running Ubuntu 12.04 to use for the ...
0
votes
0answers
14 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: ...
0
votes
0answers
19 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 ...
-3
votes
0answers
27 views

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

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). ...
-5
votes
0answers
50 views

Slow site, most time spent Blocking/Connecting [closed]

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 ...
0
votes
2answers
2k views

Bridging a vlan and OpenVPN tap on Debian

Under Debian I need to bridge a vlan eth0.1 and tap tap0. Usually, when bridging a normal ethernet adapter with a tap I would include something along the lines of this in /etc/network/interfaces: ...
1
vote
0answers
54 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 ...
-2
votes
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 ...
-1
votes
0answers
22 views

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

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 ...
1
vote
2answers
2k views

Unable to connect via NetBIOS Name

I can't connect to machines/shares by NetBIOS names. Below is console output showing the problem. C:\>nbtstat -n Local Area Connection: Node IpAddress: [192.168.1.100] Scope Id: [] ...
0
votes
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
votes
1answer
42 views

Map drive from windows to linux file share [closed]

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?
1
vote
2answers
1k views

Untangle VPN setup, how to see internal addresses?

So Untangle is setup as the default gateway at 192.168.100.1/24, it is the authorative DHCP server issuing addresses from 192.168.100.100 to 192.168.100.200 and is successfully connected to the ...
3
votes
2answers
195 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 ...
0
votes
0answers
26 views

How to find Access Points that work with mDNS and have companies prove it [closed]

I'm part of the tech department at a non-profit that does media education and professional development for youth. We are in the process of upgrading our 8 PoE wireless access points. Our old HP ...
1
vote
2answers
1k views

Smoothwall Express interface issues

I have a SmoothWall Express box that is currently configured with a Green and Purple interface. Both interfaces are in the same /24 subnet (which seems odd to me). The green interface (address of ...
0
votes
2answers
885 views

Access print server through firewall?

At my workplace, we have two fiber networks setup, one for the business network and the other for process control (industrial manufacturing). On the business network, there is a standard print server ...
1
vote
1answer
31 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 ...
0
votes
2answers
216 views

No Ping/Telnet connection between VM

I am new in Azure and have one problem which I can not solve. I tried asking on StackOverflow, but - quoting - "You will have better luck asking on ServerFault". I want several Virtual Machines to ...
3
votes
7answers
6k views

DHCP IP address lookup from MAC address

I have some computers I need to reinstall over the network, but for the install to work correctly, the computer needs to have its MAC address registered in the DNS/DHCP so that it'll be recognized and ...
0
votes
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 ...
0
votes
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 ...
-1
votes
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 ...
2
votes
1answer
82 views

ifcfg-eth0.200 is not responding to arp broadcasts

I have a Centos router doing a stupendous job in a setup similar to this: eth0 --> no IP eth0.200 --> 192.168.200.1 eth0.201 --> 192.168.201.1 ... so on up to eth0.213 --> 192.168.213.1 I have ...
5
votes
1answer
483 views

Designing segmented LAN with fairly shared hi-speed internet access on a tight budget

With another member of the owners' association, I've been tasked with designing and setting up shared, hi-speed, internet access, for our apartment building. We have very little budget and hope to be ...
6
votes
1answer
534 views

High throughput meshed VPN to connect datacenter hosts

We're renting a number of hosts in a public datacenter. The datacenter does not offer private VLANs; all hosts receive one (or more) public IPv4/IPv6 addresses. The hosts come with very modern CPUs ...
1
vote
1answer
1k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
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votes
0answers
25 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 ...
-4
votes
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
vote
1answer
755 views

Windows 7 + IPSec: Force all remote traffic through VPN

I have set up a VPN connection to an remote L2TP/IPSec VPN server, which works fine. Now i like to ensure that all remote traffic is being routed through this VPN, so if the VPN connection drops, no ...
-1
votes
0answers
10 views

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

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 ...
1
vote
1answer
1k views

Assign ipv6 address to KVM guests on bridge mode

System: CentOS 6.5 Network: Bridge on br0 IPv6: ISP Native /64 block. IPv4: ISP address (not internal LAN) Purpose: To assign IPv6 only to guests (manually), I don't want ipv4 address to be ...
0
votes
1answer
26 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 ...