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

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Use IPTables FORWARD for NFS

I have this topology [R1] -> [F1] -> [Server] I need to pass ssh, web and nfs traffic through F1 to Server using iptables. It's quite easy with ssh and web but I'm stuck with nfs. I have set static ...
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15 views

Use two different connections: one exclusively for download and the other for upload: possible?

I hope you can help me with this dilemma. I have two different connections, one is via router/ethernet, the other one is mobile: the first one has a very good download speed, but lacks of upload speed ...
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1answer
11 views

Bonding 3 10mbps adsl lines with a mikrotik

How do I get it right cause it uses all three lines for upload , but only uses two for download ? Please help Pieter
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0answers
5 views

Proper network architecture for fault tolerant multi WAN multi building WLAN setup

I need help with deciding the correct network architecture for a guest WLAN deployment. We have 3 buildings, and each of them has its own LTE router (Mikrotik RB411U) connected to an Ubiquiti ...
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7 views

Could this be blamed on the router?

The network is as follows: there is a 400MBit connection coming into the floor which is being shared by a Cisco EPC3825 over wifi only (no cable access) to up to 8 people (currently 3). The internet ...
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7 views

HyperV nat port forwarding [on hold]

Did you ever find a solution for this? Hyper-V: NAT Port Forwarding I have managed to sort out the natting but my port fording keeps freezing. Regards Mirco
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0answers
6 views

What “device” represents between socket and network

Here is a question and an answer: How many times is the data in a message copied from a user process creating it to it being sent onto the network? Answer: two times The data is copied once from ...
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2answers
20 views

Is there such a thing as a double ethernet cable?

I have a cable modem in the living room. I have ethernet running out of the cable modem to an Apple Airplay, then back out of the Airplay to a 4 port switch so that I can hardwire all my consoles. I ...
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3 views

How to capture VirtualBox VM packets

I am currently running a series of three Ubuntu 14.04 VMs on my Windows 7 x64 host. The guests are all configured thusly: Host-Only Adapter Intel Pro/1000 MT Desktop Promiscuous Mode: Allow VMs Cable ...
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1answer
8 views

Confusion about the `conntrack` extension of `iptables`

The iptables-extensions manpage has this to say about the conntrack extension (emphasis mine): This module, when combined with connection tracking, allows access to the connection tracking state ...
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0answers
12 views

What are These Outbound Network Rules

I Have a few odd looking network outbound rules for my computer they are Name Group Application Package f5.vpn.client f5.vpn.client ...
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2answers
18 views

Can you assign different default gateways on a per-application basis in Windows 7?

I have two internet connections (one satellite and one DSL). I want to route all my gaming traffic through the DSL connection and all other traffic through satellite. Each WAN is served from its own ...
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1answer
24 views

http://localhost:3000 works, but http://127.0.0.1:3000 doesn't

I'm building a Rails application on my local dev machine. When running my local server, I can access http://localhost:3000 without a problem. However, when I try to navigate to http://127.0.0.1:3000, ...
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0answers
9 views

Route certain apps through socks5 with authentication

i am trying to route traffic from a few applications that do not have a built in proxy feature through socks5 with authentication. I have tried using both proxycap and proxifier, both of these ...
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0answers
7 views

Issues with two Internet connections, two routers and one network

I recently acquired a secondary Internet connection for my own room while my family shares a primary connection. The primary connection is connected to my network devices such as NAS and printer and ...
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0answers
21 views

Strange intermittent lag phenomenon over wireless LAN

I'm connecting to computer Y on my wireless LAN at home. Y is a newly-assembled machine running Kubuntu 14.04; it's wireless adapter is "Realtek RTL8192CE PCIe (rev 01)". Between other machines on the ...
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1answer
6 views

SNMP read only risk of enabling

We are currently thinking of enabling SNMP read on our routers and switches. What are the risk of doing so. If the read mode is compromised how much damge could we be expecting.
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1answer
11 views

Make traffic go one-way by using iptables

I have a network topology: [C1] - [R1] - [R2] - [C2] C1-R1 network is 192.168.100.0/24 R1-R2 network is 10.9.8.0/30 R2-C2 network is 192.168.200.0/24 What I need to do is to make C2 be able to ...
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14 views

CS:GO SRCDS and iptables (firewall)

I have very strange problem. This morning I wanted download, install and host small server for CS:GO on my VPS. I used this tutorial: ...
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0answers
5 views

Port Forwarding using iptables

I have the following problem: I have two servers. I can connect to server A trough the internet. But I also want to connect to server B. How can I use iptables, that if I connect to server A over ...
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1answer
17 views

Forwarding requests to my external IP to a different IP

When I connect to my external IP in linux, it gets forwarded to my gateway (router). But I need to run a server, so I need to be able to forward requests to my external IP to my computers ip address. ...
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0answers
27 views

can I know who on the network copied a file from my computer from my shared files ? and how ? on windows

How to find out who copied my files from the network, is there is a log file on windows that tracks who copied files and when.
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12 views

Accessing bridged VM from within VPN

I'm trying to get a torrent remote (Transdroid) on Android to connect with a torrent client within a bridged VM. All traffic from the VM goes through a VPN. Problem is, when I attempt to connect with ...
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19 views

Wrong IP address present when connecting from localhost to localhost

I have a Linux server with Ubuntu installed on it. When I connecting to some service (MySQL, apache, icecast for example) from the same machine at address 127.0.0.1, they all show that I connected ...
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1answer
22 views

Where do port knocking services listen for incoming knocks?

I'm trying to understand how a port-knocking daemon is able to monitor for knocks, independent of the firewall rules (e.g. accept/drop/reject packets). I've installed knockd, which listens for lets ...
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11 views

How to fix NAT type-Strict on xBoxOne

I have a Motorola SBG6580, xBoxOne, directv genie and other deivces, and WOW as my ISP. For the last week I've been getting "NAT type-Strict" on my xboxone which prevents me from chatting and ...
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1answer
15 views

Lan printing issue HP 8600 pro

I'm having random issues with lan printing. Network composition: 2 PCs (Windows 8) are connected by Ethernet 2 Macs (10.9 & 10.10) are connected by Wi-Fi 1 PC (Windows 8) is connected by Wi-Fi ...
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14 views

Why does IE resolve https://localhost but Firefox does not?

We're running Windows 8.1 with the current stable Firefox and IE. There's a fresh installation of Apache 2.2 that has been enabled to do SSL. http://localhost is reachable in Firefox and IE and ...
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1answer
29 views

Sawtooth shaped ping

I moved to a new place and over here, I'm getting much worse internet speeds than I should. It was ok for the first day, around 40-60Mbps but the second and third day it dropped to 5-6ish, every now ...
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6answers
60 views

Disable internet connection permanently windows 8.1 [on hold]

I have used "Ipconfig/release" command to disable internet but it allows to connect to internet after I restart my PC. Is there anyway to disable internet permanently, and a method to restore it ...
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1answer
22 views

Check network speed

Is there a way to check that my network is alternating between the routers to the Internet? I wasn't the one that set up our network. Physically I can see that we have one phone line into the our ...
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3answers
1k views

What other IP addresses can/should I use for my home network?

I've been using 192.168.1.x for my home network, which has been perfectly happy for quite some time. However, I just started a new job, and they use the same set of IP addresses when I connect over ...
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5 views

Disabling IPv6 on a specific network adapter without UI

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 ...
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12 views

IPv6 global address lost after delay

I have a (gentoo linux) computer behind a home router (Fritz!Box 7360). When I initially connect it via a wired connection, it is assigned a link-local address (fe80:...), a unique local address ...
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1answer
33 views

Why is only 127.0.0.1 considered as a loopback when anything from 127.0.0.0/8 is routed to localhost?

In every network tutorial/reference that I've seen is as a loopback considered only 127.0.0.1 IP address. I've tried to ping any random address from 127.0.0.0/8 and it also routed me to localhost. Are ...
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4 views

Playing with nm-applet causes eth0 disappear

I was troubleshooting issues on my network at home. Computers on local network did not obtained IP from DHCP server. Now I know that SOHO router where DHCP is running went to default state for unknown ...
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2answers
22 views

Cannot connect to WiFi network on Windows 8 / 8.1

I see about 12 other WiFi networks in the WiFi list displayed by Windows and can even connect to them (one of them I know), so WiFi is basically working. However, I cannot find the network I usually ...
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1answer
19 views

Why do I need a loopback adapter on the target hosts of a Virtual IP?

I recently ran into a problem involving virtual IPs for the first time. The virtual IP targets two different (as far as I can tell, physical) hosts. The hosts are linux, but I don't know what software ...
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0answers
13 views

Wamp, Route External IP to one file and Internal IP and Localhost to Wamp HomePage

So I recently downloaded WampServer and was wondering if there would be away for me to be able to route my external IP address and my internal IP address, along with Localhost, to separate locations. ...
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1answer
16 views

Dns: results of dig of domain.com with and without www

I ran dig against a certain domain which I own, say for example domain.com. After executing dig domain.com, I obtained results like the following: ;; ANSWER SECTION: domain.com. 21600 IN A ...
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9 views

Automatically prefer interface with internet connection in Windows 7

It's fairly often that I have hardline internet and am programming devices over wifi; or am on the university wifi and am programming devices on an off-grid LAN. There is lots of Q&A here about ...
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0answers
6 views

Find My Phone - iCloud - Device Location - Locked [migrated]

My girlfriends computer was stolen this morning. She has Find My Phone installed. I'm tracking it from work, but it has a status of locked. (I'm assuming apple put this on when she called, and ...
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0answers
10 views

IPsec on a LAN without a VPN

I'd like to set up layer 2 authentication and encryption for a LAN via IPsec, without having to run a VPN endpoint. Essentially the goal is a point-to-point setup where traffic between configured ...
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1answer
25 views

Why can't the VMs in my pen-testing lab ping each other?

I have setup Kali Linux and Windows XP in Virtual Box. My first problem is, these two systems are not being able to ping each other. Second is, they are not being able to connect to the Internet ...
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0answers
22 views

Cmd cannot find a mapped drive

Here's my problem: we have a network drive that's mapped to T:\, and it's pointing to \\somecomputer\somefolder\. We can run: \\somecomputer\somefolder\someapp.exe from cmd. We can also run pushd ...
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2answers
60 views

What type of connector is on this NAS-like storage device?

I have a NAS kind of box, which I got it from my old office when they were moving out, at first I thought this was a simple Ethernet cable, but it is not. Any idea what this connection is? Another ...
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4answers
59 views

Why Telnet protocol uses only 1 port on server while FTP uses 2 ports

I got this question in a job interview and I had no idea what to answer. Can someone please help me understand it? Why does telnet protocol use only 1 port while the FTP protocol uses 2 ports on the ...
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0answers
10 views

Getting PXE-E78 error when trying to network boot [migrated]

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 ...
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1answer
19 views

Accessing APC Smart UPS Network Management Card via hostname

I've got a new APC SmartUPS X 1500 with the build-in network management card AP9631, which I can access it via the ip-address 192.168.0.154. This IP-address has been given by my router's DHCP. When ...
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0answers
5 views

tun interface not working in ubuntu14.4?

I have problem making the tun interface on Ubuntu 14.04 work correctly. The commands lsmod | grep tun and sudo modprobe tun return nothing. Even the module, tun.ko.gz in /lib/modules/ and ...