For questions on connecting devices together so that they can communicate with each other, as well as on networking equipment such as routers and switches.

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1answer
105 views

Nginx - access from a public ip address - ubuntu 14.04

An nginx server is up and running locally on my system[ubuntu 14.04]. But i am having difficulty accessing the same server from my public ip address, or from any other system using my public ip ...
0
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1answer
126 views

Gigabit NIC only connecting at 100Mbps

We have a desktop PC in a field office that only connects to the network at 100Mbps even though the GB card seems to be functioning perfectly. We have plugged in other machines into the same jack and ...
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0answers
30 views

Port forwarding between two different networks [closed]

I have three Linux computers - A, B, and C. I have a TCP server that runs on C. B and C share same network and B and A share the same network. I want to send commands (and receive results) from A to ...
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0answers
92 views

iptables - How to mirror all ports from one IP to a single port on another IP

I would like to set up IP tables on my router to mirror traffic on all ports from 192.168.1.30 and send it to 192.168.1.10:5860 I think I need to combine the two commands below, but I'm at a loss. ...
0
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1answer
110 views

OS X - Static routes / non-standard default gateway for endpoints on *local subnet*

My question is: How can I reliably set up a static route in OS X, for 2 endpoints to pass via a gateway, where all machines are on the same subnet? I provide the context below: For testing ...
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1answer
241 views

A script to change ip address without knowing the Network connection name

Let's suppose that I have some Pc with windows. Each of them has only 1 Local area connection , but I don't know the full name. Is possible to create a general script to change ip address for these pc ...
2
votes
1answer
374 views

hostname does not resolve on LAN

I’m on Mac OS X 10.7.5. Got some kind of voodoo with my hostname. I frequently run web servers (PHP/Java) but suddenly these decided to stop playing nicely. This machine always had DHCP, which never ...
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2answers
68 views

Create a Samba share for guests

Software versions: CentOS 6.6 x64 Samba 4.0.0-66.el6_6.rc4 (from YUM) Problem: I am trying to create a Samba share on my CentOS server for guests/unauthenticated users. Using the configuration ...
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1answer
621 views

AT&T U-Verse modem/router to router is very slow

I have an ASUS RT-N66U router behind the AT&T U-Verse supplied 2wire modem/router on a 24Mbps connection. The ASUS is behind the U-Verse 2wire modem, as I want to use OpenDNS and wireless N and ...
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2answers
48 views

Is there an easy way to retrieve the link speed of network devices?

We have a mix of 100 and 1000mbps cabling in this office with cabling that ranges from ancient home-made cat5 to brand new cat6, and a mish-mash of semi-accessible switches and network segments that ...
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1answer
62 views

custom message ssh “ssh_exchange_identification: Connection closed by remote host”

Usually I am blocking hosts with /etc/hosts.deny. When restricted host trying to connect to the sshserver user gets following message "ssh_exchange_identification: Connection closed by remote host" ...
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0answers
44 views

use VPN for external connections and not use for LAN

I have three 'devices' en0 (wi-fi) en4 (thunderbolt) ppp0 (pptp) in VPN settings, send all traffic over VPN enabled. Service order in main network settings window is: Thund., Wi-Fi, VPN (PPTP) ...
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1answer
82 views

lose connection in one way on local network without firewall windows server 2008 r2

we have 2 computers in our local network a few day ago we encounter an wired problem sometime network connectivity from computer one to computer two lose and we can't ping computer two from computer ...
0
votes
1answer
90 views

What is the difference between mapping a drive and simply accessing it?

What is the difference between mapping a drive using net use. eg: net use x: \server\folder and simply going to start -> run *type \server\folder *there and access it?? I use Windows 7. I see that ...
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2answers
432 views

How to get the ipv6 address marked with a specific scope?

If I run /sbin/ifconfig eth0 I get the following output: Link encap:Ethernet HWaddr <address hidden for privacy> inet ...
1
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1answer
37 views

Network Connection

good day. I have this problem just this morning. My computer, a windows XP machine, is unable to get an IP address from the DHCP server. So what I did is assign a static IP address instead. Now, ...
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2answers
153 views

Periodically send dynamic public IP to web server to allow remote SSH access

I have a home where the ISP does not allow static IPs for hosts. I have a computer (that I will call A from now on) in that home that has a SSH server running on it and I would like to connect to it ...
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0answers
148 views

Can I have server and client on the same machine and run network bandwidth test using iperf?

I have two ethernet ports (eth0 and eth1) on my system. I've tested the bandwidth with two systems and got ~940Mbit/s. If I use one of the ports as server and the other as client, I always go through ...
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0answers
166 views

How to tell if a specific port is being throttled by my ISP?

I have a very strong suspicion that my ISP is throttling the port used by a Remote Gateway Server, but I haven't found any real way to test my theory. Does anybody know of a way to do this? That is ...
0
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1answer
104 views

List wireless networks on Mac with external WiFi adapter

I know I can use the airport command on a Mac to list nearby wireless networks, but this only seems to work for the built-in WiFi card. How can I do this if I'm using an external, USB WiFi adapter? ...
0
votes
1answer
76 views

PCs and printer are unable to communicate with each other even if they both can communicate with the router over wifi

both my printer and my PC are connect to the router (DLink DIR-605L) using WIFI and internet is working on my PC. My printer works only if I connect my PC to router over a ethernet cable but it ...
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2answers
280 views

How to make Windows 7 Virtual Machine get an IP address dynamically from another VM in the same VMware workstation 9

I am running an instance of VMware workstation 9, in which I have installed Windows Server 2012 as one VM and Windows 7 as another. I want the Windows 7 VM to get an IP address dynamically from the ...
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0answers
805 views

Occasionally got “Request timed out” when trying to do ping test on a LAN server. What likely will be the cause?

I want to troubleshoot what causing the connection unstable between workstation and server in a LAN. When i try do the ping test, the reply sometime “Request timed out.” Any idea what likely the cause ...
0
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1answer
159 views

ForceBindIP on right click menu problems

I'm trying to add ForceBindIP to my right click context menu and here's what I have attempted thus far. [HKEY_CLASSES_ROOT\exefile\shell\ForceBindIP] @="Run through wireless network" ...
3
votes
1answer
5k views

cannot access network shares on domain - export all network settings in windows 7 for troubleshooting

I am on a domain computer running Windows 7 Enterprise. I am having trouble accessing network drives and network shares (including network printers). I am able to access the internet fine. I have ...
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1answer
106 views

WLAN: Domestic Router only handling up to 15 clients

I guess this could be a problem concerning: processor, memory or bandwidth. I have a TL WR841nd router, and I need to connect 35 tablets into it via Wireless. Just WLAN! no Internet. However, the ...
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1answer
97 views

Pinging a cellular router

I have a cellular router that currently has a 3G SIM card plugged into it. I'd like to be able to access the devices behind my router by sending and receiving data over cellular WAN. As a first step, ...
0
votes
1answer
130 views

Transmission doesn't connect internet after ip address change

After I've changed ip address on raspberry pi I've got problem with torrent client Transmission. It doesn't start download or upload of torrent file. I've updated /etc/network/interfaces, but it ...
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0answers
195 views

TP-Link Router Configuration

This is the network configuration in our building.(Below Linked Image) Computer 1 , Computer 2, and Computer 3 and Wifi router D are connected to switch using wired ethernet. Laptop D1 and Laptop D2 ...
0
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1answer
425 views

Windows 8.1 + DNSCrypt + Unbound for DNS Cache

I'm following this guide (http://yvoinov.blogspot.it/2014/05/windows-7-unbound-dnscrypt.html) and others but nothing: I have Windows 8.1 x64, DNSCrypt 1.4.3, Unbound last version downloaded from the ...
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0answers
97 views

Nginx/Owncloud not accessable from outside my local network

I've got a Raspberry Pi with Nginx and Owncloud installed. I forwarded ports 80 and 443 in my router. When I type my DDNS adress on my Pi, it opens my Owncloud page without any problems, but from ...
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2answers
4k views

TCP Dup ACK/Retransmission, bad configuration?

I'm currently investigating network issues of a friends LAN (again). The Internet connectivity is very slow and unreliable and sometimes services simply don't work. I've monitored the traffic for ...
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4answers
3k views

Port forwarding failure on a Zyxel VMG8324-B10A

I’m trying to port forward a TeamSpeak 3 server, I’ve done this several times before with success. But now I have a new router and it doesn't seem like it wants to play nice. I confirmed that the ...
0
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1answer
26 views

What could cause internet speed to drop on devices but others work fine?

Ok, I have suddenlink 50m internet. My internet will drop down to about 15m. We've had techs come look and on his device using our internet it shows it working at 50m, but on our 2 pcs and 2 ipads ...
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2answers
2k views

What happens if 2 devices want the same static IP address?

I don't know much about IP addressing. In my mind, static IP addresses are something that a device requests, asking for a specific address. With that approach, what happens if 2 devices attempt to ...
0
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1answer
310 views

Running tunneled IPv6 in Windows 8.1 without gogo6 Client

I have just discovered that my ISP (IT Fastweb) provides IPv6 services to home users. Willing to try out connectivity, I have read their page about configuring IPv6 with gogo6 client. Their guide ...
1
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1answer
89 views

Use computer name instead of ip address in heterogeneous environment

I have got a few machines all connected to a ISP supplied router; a Netgear CGD24G. I added a 1Gb switch because I have too many computers. Otherwise, machines connect to the home network either via ...
5
votes
3answers
1k views

Correct domain name for a home desktop Linux machine

I have several machines running Debian, and during install, I left the domain name field blank. This hasn't affected anything so far, but I'm curious what the correct thing to set that field to is if ...
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0answers
50 views

Forward HTTP traffic to a server behind gateway

I have a server behind gateway, which means it’s only pingable internally. Now I want to forward traffic from a outside server to this internal server. I want to use socat like: socat ...
0
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2answers
110 views

If a port behind NAT sends a packet to a malicious host, can that host send packets to any open port, or only the port that sent the packet?

For example, a computer behind a NAT router uses Skype. Skype uses port 4000 to send packets to a server to establish indirect connections with other Skype clients. Since Skype had sent a packet to ...
2
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0answers
281 views

What are some ways to disrupt BitTorrent activity in OpenWRT? [closed]

My Internet subscription belongs to me in name, so I need to make a best effort to prevent housemates from getting me flagged for illegal BitTorrent activity. I read that deep-packet inspection is a ...
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0answers
56 views

Computers on the network randomly try to contact ISP DHCP not router DHCP

I've been fighting with this issue for a few weeks, but one of my clients has Cox Communications as an ISP, with their standard modem, and a Netgear Nighthawk x6 router. Originally the client had ...
0
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2answers
213 views

Assistance understanding the output of “netstat -b”

I’m using Windows 7 64-Bit, and ran netstat -b and it outputted the data to a text file. Their are 4 columns “Proto,” “Local Address,” “Foreign Address,” and “State. The “Foreign Address” states my ...
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0answers
44 views

vmWare Workstation no https

I've setup a new VM running CentOS 7. My connection is currently Bridged (though I had the same problem with NAT). I'm able to connect to the internet through the host connection (just a Windows 7 ...
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0answers
36 views

Wireless network lost internet

I'm working on a network with 6 workstations, server, Netgear 16 port switch, Netgear Router R6250 and it has been chugging along for well over a year now. Yesterday, none of the wireless devices can ...
0
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1answer
87 views

DIY Gigabit cable wiring

I have a Cat7 cable Draka Comteq UC600 Super Screen 27 4P Category 7 S/STP IEC 61156-6 FRNC. I wired with two RJ45 connectors using T568B on both ends. The stripped part at the end is approximately 1 ...
0
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1answer
166 views

How can I tunnel from one computer on a Wi-Fi connection to another specific machine on the LAN?

I have 3 computers connected via Ethernet in 1 room 1 laptop with Windows 7 Ultimate. 1 laptop with Ubuntu 12.04. 1 PC with Windows 7 Ultimate. Both laptops use their own independent Wi-Fi ...
0
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1answer
36 views

Internet version of zeroconf [closed]

How practical would it be for, say, an ISP's provider to develop a Bonjour-like protocol for the Internet? I can think of a few uses for this technology: A businessperson who needs something printed ...
1
vote
1answer
1k views

VLC UDP network stream does not work in Windows, but does in Linux

I've got a udp stream (not accesible to the outside world) that VLC has able to play under Linux, but isn't able in Windows. Windows Firewall is turned off. In order to test the udp stream in VLC, I ...
0
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1answer
155 views

Q: How can I set up a system to stream SMS (text messages) to a printer such that they're printed as soon as they're received?

I'm trying to help a relative running a restaurant/bar. She'd like to be able to receive orders via SMS (text message) and have them print to a single printer in the kitchen (preferably, via Google ...