Networking is the art of connecting two or more devices together so that they can communicate with each other.

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resolv.conf keeps getting overwritten when dnsmasq is restarted, breaking dnsmasq

I'm running Debian Jessie and I'm trying to configure dnsmasq as a caching DNS server. I used a guide to come up with the following /etc/dnsmasq.conf: listen-address=127.0.0.1 bind-interfaces ...
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1answer
18 views

Unable to SSH to internal IP

Read a few related questions here and here. The situation is as follows: assume that I have a computer A and computer B. I am able to ssh to both computers when by setting Port Trigger and Single ...
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2answers
20 views

I can't find my modem IP at all

Every tutorial I've found so far help me find my router IP but I need my modem IP as well. I have two devices, a wifi router and a dsl modem, not 2 in 1. The ipconfig -> default gateway, returns the ...
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1answer
27 views

How to determine remote PC network address?

Let's say I have two PCs connected with ethernet cable. No NAT, VPN, routers ... nothing, just one cable with two PCs connected to both ends. The PC1 has an IP 192.168.1.1/24. I want to set up ...
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3answers
78 views

can't remember what ip address of a router set up as an access point is

i tried to set up my belkin n+ router as an access point a month ago, but failed, and regrettably failed after i had set it's ip address, which i can't remember. so now it appears bricked, as i don't ...
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0answers
8 views

ethernet usb adapter ax88179_178a, ARP captured with 62 bytes

While debugging some l2 protocols on an ethernet usb adapter (chipset ax88179_178a) I noticed 2 bytes from Frame Check Sequence (FCS) are promoted to user data. Dump of the arp frame 60 bytes is now ...
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1answer
7 views

How to configure Sophos UTM to mask an internal ip with a DNS name

I have a CRM software which runs on Apache on a separated network at a 10.10.10.10 ip while my local network is at 192.168.1.0 range. I also have 10.10.1.0 range for VPNs which are only can connect ...
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0answers
53 views

Multiple Gateway, for VPN and Internet

I'm pretty new as a system administrator and I've got a problem to deal with in my company. We recently got a VPN and it is working great, I already tested it and all is good. Now in my main site, ...
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1answer
14 views

The best way to setup port forwarding

I have a situation when I want to connect from Windows machine to a web server running in virtual machine in Linux host. For this I would like Linux host to listen on a certain port and redirect it to ...
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1answer
13 views

Restricting certain printers to certain programs

At my place of business, we use desktop PCs as Point-of-Sale units as well as workstations. We have two networked laser printers (standard letter size) in the office as well as receipt printers at ...
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1answer
343 views

Pinging different IP address than what I entered

Can anyone please explain why CMD pings a different IP address than the one I am searching for?
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0answers
20 views

Install Windows 7 64bit over network

I am trying to get our computers and network setup to where i can re-install (or fresh install) windows over our network. All our computers get set up the same way with the same software. I would like ...
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1answer
24 views

Setting a system for university dorm voice communication

I'm interested in setting up a system which would allow students in my university dorm to communicate to each other freely. Not sure if we can use existing wifi-routers installed in our hostel ( ...
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1answer
12 views

Windows 7 / VirtualBox / VMWare : DNS : local name fails - not even DNS lookup, FQDN works

My problem in short: Entering http://app01:8084/ into the browser does not find my server. Entering http://app01.my.domain.com:8084/ does work. With the localname Wireshark not even captures a DNS ...
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0answers
15 views

Network kBit/s drops to 0 intermittently

I am streaming live video to a server on my PC, now and again the video stream would freeze. When looking at the output from nload the network speed seems to drop to 0kBit/s for a second and then ...
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0answers
13 views

How can I share the Wireless connection across my LAN, and still access LAN locations

At the moment I have the following setup (all windows 8.1, router: BiPAC 7800N): Generally, 50-60% of the time, I use the router to connect to the internet (1.5mbs), but usually when working I ...
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1answer
16 views

Hide HTTP Destination with a Raspbery Pi

I wanna realize some kind of WebServer or Proxy on my Raspberry Pi that hides the real http requests from any firewall. Following scenario: computer@school --Request--> myRPi --Request--> ...
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5answers
3k views

DNS lookup fails after resume from sleep

My Windows 7 Ultimate x64 PC has a strange networking issue. When I resume from sleep, no web pages will load (other programs such as Hamachi VPN are also unable to locate their servers). If I use ...
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1answer
36 views

Two routers at home, is there any intrinsic property that could differentiate networks?

I have two routers: A is a Samsung CY-SWR1100. B is a Bless ZIO 9500GD. Both are capable of both wired and wireless connections. I have disabled wireless features on A, and connected B's uplink to ...
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2answers
5k views

My laptop can't access files from my desktop

Here is my problem. I have a desktop, a laptop and a typical router. The desktop is connected through wire and I connected my laptop wirelessly. I can access my desktop files through my laptop, but I ...
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10answers
47k views

How to find how many hosts are on subnet mask: 255.255.255.252?

I have Wireless Internet with a USB modem and got what seems to be a Class A IP allocated (first byte is decimal 10). ipconfig /all shows a subnet mask of 255.255.255.252. I know that the ones are ...
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2answers
2k views

SSH error ssh_exchange_identification: read: Connection reset by peer

I am trying to access ssh to a server but got "ssh_exchange_identification: read: Connection reset by peer". The same client works well when I move the computer to home but show the error when the ...
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0answers
14 views

Can I connect to a remote desktop computer to make a call using a home telephone landline number?

I am living in country B, I own a residence in country A where my family lives. There is a desktop computer that I remotely access and use through TeamViewer. Can I use that computer to make calls ...
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1answer
33 views

Probing a port for RDP

I use an ssh tunnel to RDP into my home computer ("home"). Occasionally, the tunneling software running on home crashes and the RDP port stops getting tunneled. I've attempted to resolve this by ...
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13 views

HP ENVY 5530 e-All-in-One Printer seemingly not connected to Wi-Fi… Yet somehow is?

I am struggling to figure this out. When I attempt to print from my Mac running Mac OS X 10.10 (Yosemite) it says it is not connected. On the printer—an HP ENVY 5530 e-All-in-One Printer—it says it is ...
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17 views

What is port 1001 used by NT Kernel & System on my Windows 7?

Sometimes i make ssh tunnel which listen as sock proxy on port 1001. But lately i can't bind to this port. Apparently this port already occupied. I can bind to any port for my ssh tunnel. But I'm ...
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2answers
4k views

How can I solve Windows PPTP VPN issues?

I'm having persistent problems with Windows PPTP VPN connections. The VPN appears up whilst the tunnel won't transfer traffic (ping to a remote IP within the VPN works for a while, and then fails). ...
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2answers
33 views

Accessing files on a Windows 7 Professional laptop from a Windows 8 desktop

I recently purchased a refurbished laptop running Windows 7 Professional. I also own a desktop running Windows 8.1. I want to have access to all the files on the Windows 7 Professional laptop—less the ...
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3answers
4k views

Can't ping localhost/or reach locally hosted domain

I can’t reach a locally hosted domain, and in testing I have discovered I can’t ping localhost or the actual IP either. The OS is Windows7 64bit, Pro. DNS works, I can ping others on my network, ...
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1answer
20 views

Cannot access windows7 hosted network from lumia 630

I have created a hosted network in my windows7 system. But my Lumia 630 but my phone can't connect to this except once(when I started the hosted network first time). Every time when i try to connect I ...
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1answer
18 views

Server 2012 R2 on a single server running AD and DNS

Is it possible to configure the DNS server to get to both external and internal domains with the same name? Have an ISP handling web site with the same domain name as my internal domain. DNS server ...
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43 views

Why Have Multiple Servers [on hold]

This may be an elementary question, but I am wondering what the advantage of having multiple servers (SQL Server, Web Server, NAS, Domain Controller, VPN, etc..). Why not have all of these pieces of ...
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Prevent flooding in Ubuntu [on hold]

I have an Ubuntu machine and I think a software running on it cause flooding of my router and my internal network goes down. There exists any software, in Ubuntu, to prevent this to happen? For ...
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0answers
23 views

.Net application cannot connect to remote servers if it is started before VPN is started [on hold]

We have a C# (.Net 4.5) Winforms app that communicates with a web server hosted over the internet. It works fine otherwise but fails when user switches to VPN while it is running. It is ...
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1answer
24 views

What is the proper way of setting up two IP’s with one domain name?

I have two Ubuntu Servers (S1 & S2 for example) on two different public IP’s (static & are in different locations). I got a domain name from GoDaddy. Lets call it, example.com. I have setup ...
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1answer
11 views

view shared folders for only users who shared with

I shared a lot of folders in my PC , every folder with only one person, when everyone enter to my computer on network, will see all folders that I shared. and this will be confusing. becaus person ...
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1answer
12 views

CheckPoint VPN plugin returning “The server returned an invalid response” in Windows 8.1

Our customer provides a Checkpoint-based VPN. My workstation runs Windows 8.1 Pro with the built-in VPN plugin for Checkpoint. I have IP address of VPN and its credentials. I have followed the ...
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0answers
15 views

Can't connect to IPSec VPN via D-Link DIR-100 router

I am trying to connect to VPN via Cisco Systems VPN Client with IPSec/UDP transport, but I am getting error: Secure VPN Connection terminated locally by the Client. Reason 412: The remote peer ...
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0answers
24 views

LAN network freezes

I have three Ubuntu computers connected to a router. Everything's OK, both have internet conections running well and can connect via ssh to each other. In one computer, I usually launch a softwared ...
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1answer
30 views

Know username who is working on remote desktop

We are a team of 20 people we have a machine that is used by everyone. We take remote desktop of that machine to work on. so if somebody is working and i want to take that i have to ask everyone in ...
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2answers
41 views

How are Internet connections differentiated from each other by an operating system?

Given this example, how would my operating system differentiate between each request. Let us say I have 3 tabs open, and at the same exact time, they all go to http://google.com. How would my ...
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1answer
107 views

Bittorrent Sync upload/download rate limit not working

I am happily using BitTorrent Sync but I can't limit its upload/download rate. If I click on the Preferences Gear --> Advanced I can set "Limit receiving rate" and "Limit sending rate". I do this, ...
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1answer
11 views

No networks found upon returning to original location

The oddest thing is happening with my network connection. I can work on it fine at home, and then I bring it to school and it connects automatically to that network too. But then when I get back ...
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3answers
56 views

How can you calculate IP address subnet ranges?

If you're given: Number of needed subnets: 2 Network Address: 195.223.50.0 I can answer the following: Address Class: C Default Subnet Mask: 255.255.255.0 Custom Subnet Mask: 255.255.255.192 ...
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1answer
5k views

Manually Setting Interface metric priority of Network Adapters not preferring lower metric route on Windows

After Connecting to Cisco VPN AnyConnect, Now I have two network interfaces having set same default routes, but with different metric values. Even after manually changing/raising the metric value of ...
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2answers
30 views

How to connect to my web server?

I have implemented a simple web server as a solution to a course assignment and I want to connect to this web server over the internet. I've set it up to listen on port 22881 and configured my router ...
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0answers
23 views

Localhost webpage not available on LAMP over Mac OS X 10.10.1

I am trying to setup LAMP on my Mac OS X 10.10.1 I configured localhost folders including /Library/WebServer/Documents/, /etc/apache2/Users/username.conf and Sites folder. A telnet localhost 80 ...
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3answers
596 views

Two WiFi networks work only simultaneously on OpenWrt

I am trying to use device TP-Link 3020 router with OpenWrt installed to both connect in and connect out by WiFi. I have home WiFi network and I setup connection to it ("client mode"). Then I set ...
2
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1answer
14 views

Dual Ethernet port PC routing issue

I have two ports on my PC. I have configured them on two different subnets. Eth#1 connects to the internet thru a Comcast router. Eth#2 is normally disabled unless I want to use my VPN router to ...
3
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5answers
608 views

Can I ping the public IP of a 3G dongle?

I want to ping my mobile device. It's a Raspberry Pi which has a 3G dongle and a working 3G connection. I can ping from my device to the outside but not the other way around. What I've researched so ...