Tagged Questions

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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11 views

Access private KVM from public KVM

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 ...
0
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0answers
23 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 ...
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
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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 ...
1
vote
2answers
25 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
9 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: ...
3
votes
1answer
54 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
24 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). ...
-5
votes
0answers
44 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 ...
0
votes
0answers
26 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 ...
0
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0answers
48 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
20 views

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

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
1answer
40 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?
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
vote
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
votes
2answers
188 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

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 ...
-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 ...
-1
votes
0answers
19 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 ...
0
votes
0answers
3 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 ...
-2
votes
0answers
22 views

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

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
20 views

Setup network between 2 computers connected using wifi [on hold]

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
votes
0answers
9 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 ...
3
votes
2answers
68 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 ...
0
votes
2answers
50 views

Why would a public subnet be used here?

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 ...
0
votes
1answer
19 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
votes
0answers
20 views

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

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 ...
0
votes
0answers
16 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 ...
0
votes
0answers
10 views

Realtek dongle not working on beaglebone [on hold]

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 ...
0
votes
0answers
13 views

Connect Multiple Users Behind same NAT l2tp/IPsec

I have installed OpenSwan on CentOS 6, the clients connection to the server is successful and when i direct my browser to http://whatismyipaddress.com on the client it shows the public ip of the ...
1
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0answers
61 views

Is it normal for uploads on ADSL to make the connection unusable (> 4000ms latency)? [migrated]

I have an ongoing saga with my internet connection; where the latency periodically goes through the roof. In most cases, this seems to coincide with something uploading data. I'm not having a lot of ...
0
votes
0answers
24 views

pfsense access openvpn client´s lan

I want to cover the following case: pfsense server´s LAN: 10.1.0.0/24 openvpn client network: 10.2.0.0/24 Local network of one openvpn client: 192.168.2.0/24 Working: Access the network ...
0
votes
0answers
46 views

Forwarding traffic from one ethernet interface to another

Earlier, I was trying to get traffic from one ethernet interface to another without using a bridge. Here is a link to the solution : ...
-1
votes
0answers
30 views

Send traffic out the right interface (Linux) [on hold]

I have two interfaces (wan and wan2). I want to use wan2 interface to connect to only one port (for example 9999). I do not want to use it to connect to other ports. Connections to the rest I want to ...
0
votes
0answers
4 views

wget is unable to resolve host address 80% of the time [migrated]

I have a wget 'http://xxxx.net/somepage.asp?params@abc' in a bash file. When I run it, four out of five times it says: Resolving xxxx.net (xxxx.net)... failed: No address associated with hostname. ...
0
votes
0answers
24 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 ...
0
votes
0answers
16 views

Azure VM belonging to multiple cloud services

I am brand new to Azure and still trying to figure everything out so please excuse my ignorance. I'm trying to take one VM running IIS and to host multiple websites on it, each with a different SSL ...
0
votes
0answers
5 views

Can't reach Ubuntu guest vm from Windows host using VirtualBox Host-only interface [migrated]

I used to have this working, but had to reinstall VirtualBox this morning. I have Windows PC with VirtualBox installed. I have an Ubuntu VM. I am unable to access services on the Ubuntu VM from the ...
0
votes
0answers
8 views

issue with QSFP+ to 4x SFP+ cable

I have a Gigabyte MD60-SC0 motherboard which has a QSFP+ port. I need to connect this with another machine I have which has a Intel X520-SR2 NIC (with two SFP+ ports) plugged in. I also have QSFP+ to ...
0
votes
0answers
20 views

Can't Ping External Servers [closed]

I can't seem to access any external servers from my server, however my server can be reached. I am using Arch Linux. Trying a simple sanity check I found the following: ping google.com ping: unknown ...
-1
votes
0answers
16 views

Linux router under VMware can't contact physical gateway server intermittently

We're a site with upwards of 800 concurrent users with most services hosted on the Internet and a BYO service to facilitate access to these. Situation is some days - not everyday - we're seeing our ...
0
votes
0answers
4 views

I want to Host My Website from My Home Network [migrated]

I want host my simple Html Site on my Home Network using Apache Tomcat 7 I have domain which is perfectely pointing to my router's IP Address I did forward my port (Router Port) Like below Screen ...
0
votes
0answers
3 views

DDWRT router's DDNS update fails when using Static IP as Wan connection [migrated]

In my network I have two routers. 1 normal router (ADSL, given by ISP with iptv preconfigured ). 1 Asus router with DDWRT. I have set the DDWRT router to set DDNS (open dns through dnsometic). The ...
0
votes
0answers
81 views

VMs on ESXi system, only able to use internal IPs

first off I am a bit of a network newb, I know the basics but that is about it. So I have a ESXi server running a few VMs. The set up is; -Master IP (controls the ESXi box) -Internet IP (for general ...
0
votes
1answer
33 views

Server 2012 Can't Ping Local Network

I have four Windows Server 2012 servers hosted on ESXi 5.5. The first one is the firewall box with two network adapters. One with an external connection to the internet, that is shares its connection ...
0
votes
0answers
5 views

Packet forwarding for guest VMs not working [migrated]

I'm am running some VMWare Fusion VMs on OS X, and I'm having trouble with networking. OS X has a Wifi interface with two IP addresses: en0: ...
0
votes
2answers
65 views

How does Linux pick which network interface to use?

Let's say I have a machine with two network adapters on different subnets, eth0 (10.0.100.5) and eth1 (10.0.200.5). Assuming both subnets have routes to the internet (though their own NATs) and to the ...
0
votes
0answers
57 views

Unable to ping or access local device

I have a very strange problem where I can't ping a router acting as client from one pc but at the same thing I can from another pc which are both connected to the same router. I have Router-1 ...
-1
votes
0answers
17 views

How to setup public IP on localhost - Ubuntu [closed]

I have configured my Ubuntu server on localhost and got my router configured from my isp with IP. But I unsure how to configure it to make the server live. Can anyone please help me with ...
0
votes
0answers
20 views

Check concurrent connections per user on OpenVPN server

I have an OpenVPN server running on a dedicated server and I want to know how many connections each user has open with the server. To test, I made it so im the only one that can login, and then ...