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

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659 views

Is it better to run voice, data and tv cables in separate conduit?

I'm hoping to run new phone, ethernet and coax cables. As it turns out, I'll also be running 3 conduit runs from the distribution point to the attic. Is there a significant benefit to running the ...
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2answers
2k views

Cisco Packet Tracer: Configure Switch to Boot Using Specified Image

I'm doing one of the Cisco Packet Tracer activities for my class and I'm having a problem on one particular point: Step 1. View current files stored in flash. On S1, enter the command show ...
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1answer
56 views

Disable NIC on CentOS

I have a server running on CentOS 6.5, the server have 2 NICs, and it happen sometimes when I reboot to pickup the a different NIC, I am trying to completely disable eth0 and the NIC linked to it. ...
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29 views

Do faulty 100mb half-duplex connections flood a subnet with collision traffic?

I'm on a subnet where a lot of machines are falsely getting set to 100 megabit half-duplex connections. Could this potentially slow down other machines on the network that have proper full-duplex ...
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1answer
825 views

What does this iptables rule mean: tcp flags:0x06/0x02 TCPMSS clamp to PMTU?

What does this iptables rule mean: tcp flags:0x06/0x02 TCPMSS clamp to PMTU? Doing iptables -vnL on my DD-WRT router shows the following rule in the FORWARD chain: TCPMSS tcp -- * * 0.0.0.0/0 ...
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9answers
53k views

Are routers limited to number of devices?

I'm going to buy a new router, but, I've just realised that for nearly all routers I've looked at (Belkin, Netgear, D-Link) don't state the maximum number of devices which can connect concurrently. ...
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3answers
830 views

How to communicate with devices that have the same IP address

I have a situation where I need to communicate via telnet to multiple devices that have the same IP address. The context is that I am writing a "final test" of devices in a manufacturing facility. ...
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2answers
64 views

TCP/IP minimal size

I am using a high level language on a PC to send a message via TCP/IP to a remote device which is an embedded device. I am sending relatively small messages (< 255 bytes). I must assume that there ...
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99 views

How to get proxy address from browser settings?

I work behind a proxy and as a consequence, I had do configure my browser to let it know the proxy adress (my_proxy)and port (1234). I did with manual configuration. It looks like this : However, ...
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158 views

PPPoE interface goes down, and does not up automatically

In my Linux system, I had configured pppoe connection. My interface configuration file /etc/sysconfig/nework-scripts/ifcfg-eth1 is TYPE=xDSL DEVICE=ppp0 BOOTPROTO=dialup USERCTL=yes IPV6INIT=no ...
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402 views

Can Putty establish a gateway to the SSH remote server?

My desktop home computer (see the image below) connects via SSH to the Office Server (via internet, of course). I connect to that server from my home desktop (running Linux) by using the OpenSSH ...
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23 views

Routing traffic on a loop

I have two Ethernet to RF transmitters that I am trying to stress test. I need to send a message over Radio A, receive it on Radio B, check that the sent message and the received message are the ...
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1answer
115 views

Sinkhole Planning

I am currently planning on setting a network sinkhole in my... network. I have a list of sites that I want to block, around 300k of them. What is the recommended way to do this. My computer is its own ...
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1answer
90 views

Cat5E UTP transmission speed

As I have understood Cat5E FTP (STP) cables support up to 1000mbps transmission rate. But I have seen them in stores that describe them of being capable of only 155mbps trx. Do both kinds exist? Or ...
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2answers
232 views

Slow CAT5e speeds

Local cable installed a 120 foot cat5e cable from our router to our smart TV, but there was no connection, so I decided to terminate the cable again myself. I bought a crimper and some RJ45 ...
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142 views

Pinging local machine with external IP

On a Gentoo server, I am trying to wget or curl a page from its url: wget http://example.com/test.html (I can get result for this url from my browser) All I receive is Timeout. With cUrl I get ...
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155 views

static ip cant be browsed locally-windows server 2012

we have a machine with windows server 2012, we used to host the websites through a static ip , the strange problem is we are not able to locally browse the hosted sites(within our lan ip doesnt ...
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1answer
105 views

How do I set a secondary DNS for my workstation?

All PC's on our domain are set to obtain the DNS server address dynamically, as part if DHCP, but I would like to set a secondary, fixed address DNS server for testing web sites on our dev machine. I ...
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2answers
27k views

“Connection refused” vs “No route to host”

I have an Apache server running on a server: [root@te-srv2 ~]# ps -ecf|grep httpd root 698 32047 TS 19 10:45 pts/24 00:00:00 grep httpd root 32081 1 TS 19 10:16 ? 00:00:00 ...
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39 views

No DNS But Internet Access

Today while using a Wifi Analyzer I noted that I had 100% loss of ping packets to the DNS Server. To try to isolate the problem I hard wired my computer to my cable modem bypassing my wireless ...
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0answers
154 views

How to prevent Outlook from sending header with IP address and hostname

Right now Outlook 2013 is sending each message with a header containing hostname, internal IP and external IP. How can this be stopped? This must take place on a local level because the computer is ...
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1answer
104 views

Is it possible to use DHCP to obtain default gateway and DNS server only?

I have a few VMs which I want to keep with static IP addresses. However, I run those on my laptop and frequently connect to different networks which use different default gateway and different DNS ...
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104 views

Issue with sending/receiving from Outlook 2013 on Windows7

I got Windows7 and Office 2013 with Outlook2013. My colleague and myself (there are just two of us in the office) are having troubles with both sending and receiving emails. ONLY using the Windows ...
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1answer
43 views

One machine on network wont load our website

There is one machine on my network that can not access one of our websites! Chrome just idles for a while then says "Oops can't connect", similar behavior is observed in other browsers too. Nslookup ...
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4answers
13k views

Should I run my small website in port 80, 8080, or 81?

I am running a small website using nginx. Since there's (probably) not going to be a lot of traffic in my server's lifespan and to avoid random DoS attacks, I am considering setting the web server to ...
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1answer
75 views

VPN error 800, when remote but not locally

I am going to spend a few days in my summerhouse, and i would like to have access to all my media on my server so i am trying to set up a VPN. I have followed a guide, and i am abe to connect to the ...
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97 views

2 Network interfaces, one routed through the other

I have a Debian box with eth0 configured as 192.168.0.3, with gw as 192.168.0.1 and eth1 is configured as 10.0.0.1 and no gateway. My home network is on the 192.168.0.0/24 network, and I am going to ...
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1answer
1k views

Port forwarding not working on ZTE router

I am using a ZTE wi-fi router. My laptop's private IP is 192.168.1.2 where Apache server is running on port 8080. I added the NAT rule to forward http traffic to my laptop. Protocol - all Starting ...
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411 views

Home wifi network (extended) dropping internet connectivity

Just as the title states, my home wifi network drops internet connectivity every once in a while. Network setup: Modem/Router solution Thomson Technicolor Gateway TG799vn v2 (ISP handed it to me) ...
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1answer
98 views

What is a fail-proof way to finally set-up and use a printer over the network?

This is how things are; I'm sure most of you are familiar with it: PC A has a USB printer installed on it. PC A is connected to the network. PC B is connected to the same network. It can access PC ...
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2answers
2k views

Can access my server by localhost but not by ip from the same computer

Am working on a development task at home. I am running a django developoment site on my machine. I can access it simply at http://localhost:8000. I decided to try and forward that port ...
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34 views

Caching big files for local network, with authentication on internet

I'm trying to do something which I'm sure it's been done before, so I would like some help finding the best tools for the job. I have a data download server on the web, right now a user has to login ...
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76 views

No internet connectivity in Windows / Android; OS X and VPN work fine

The landlord where I live has recently changed ISP, and consequently had to replace their primary modem/router. As I am some distance away I connect through a satellite router which they also set up. ...
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34 views

redirect from one site to another [duplicate]

To avoid spending time on the internet I decidet to block several time wasting web sites I added rule redirecting several pages to localhost changine file C:\Windows\System32\drivers\etc\hosts I ...
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1answer
215 views

Linux: Is it possible to know if my kernel has support for “policy routing” enabled?

I am following these instructions in order to configure multiple default routes for Linux (I am testing it on Ubuntu v12.04 and Kali v1.0.6), and the feature "policy routing" is requested enabled in ...
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23 views

Is MAC compulsary for a NIC?

Is it possible for a NIC/ network adapter to communicate with internet if it is not assigned a MAC address ?
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4k views

OpenWRT: Forward traffic to non private IP address space through VPN

I am running an OpenWRT router which establishes an VPN connection via OpenVPN and routes all traffic through the VPN. The OpenWRT router is behind another router, which establish the internet ...
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1answer
142 views

What device to use to share LAN's internet?

See what I want to do:- In my department, my boss's desktop is connected to department's LAN via cable wire by which he also surfs internet. Whenever I too have to use internet, I pull out LAN wire ...
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194 views

ssh to linux through ethernet bridge to windows

I have the following setup Wifi / \ / \ Fedora Desktop Windows 7 Desktop (10.0.1.16) (10.0.1.15) \ ...
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1answer
6k views

Why does Win7 SP7 64-bit try to resolve DNS agsint IPv6 DNS Servers?

Pretty vanilla, just installed Win 7, SP1, 64-bit. NO IPv6 ACCESS. The network status says IPv4: Internet. IPv6: No network access. Pick a domain that has DNS servers that have both IPv4 and IPv6 ...
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1answer
85 views

How can I load balance two routers/APs?

I help host a LAN several times a year. At our last event, our wireless router kept resetting, we suspect due to the heavy load (roughly 20 high-demand, gaming machines simultaneously pulling ...
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1answer
295 views

Unable to connect to custom port on Amazon EC2 instance

I saw many posts about the subject, but none of the suggested solutions seem to address my problem. I am using simple echo client-server programs test connectivity to Amazon EC2 instance running ...
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1answer
465 views

autossh - remote binding and closing the tunnel

I'm trying to tunnel computer a to computer b (using autossh) I want that port 8080 in a.com will be mapped to port 8080 in b.com from computer A: autossh -M 0 -q -f -N -o "ServerAliveInterval 60" ...
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251 views

Unable to ping within VLAN

I have following systems connected in the same network. System A eth0 > 10.25.1.221 netmask=255.255.240.0 System B eth0 > 10.25.1.142 netmask=255.255.240.0 Now, i had setup VLAN ...
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1answer
83 views

Take TCP stream and rebroadcast to UDP multicast?

How can I, in Windows and/or Linux, take data from a TCP stream and rebroadcast it on UDP to a specified multicast group? The stream data will need to be chopped into chunks of 500 bytes or less. ...
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1answer
42 views

How to access large volume of shared files?

I am part of a group of engineers that works together on simulations; we are having trouble figuring out how to store/access simulation output files. Each simulation study generates ~20GB of output ...
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108 views

“One-Way Networking” Issues?

Our information systems' clients can't connect to the server. Even Simple Networking won't work. The server links to client systems through a network switch. The server can PING the client system, but ...
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1answer
195 views

wget - difficult - How to download all links from a page including different path ones?

To make explanation easy and a bit entertaining let's imagine I want to download wikipedia pages of all the people mentioned here with one wget command, possibly with reasonable amount of other pages ...
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3answers
260 views

How to manage my network

I have a main router-modem-wifi(D-Link 2730 U), from which we use internet on ground floor floor, there is one more wifi on ground floor (D-Link Dir 505) which extends the range of my modem. My ...
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392 views

Ad Hoc Network Connection causes Blue Screen of Death DPC_WATCHDOG_VIOLATION

I recently had my home internet go down, so I stood up a tethered Ad Hoc Wireless hotspot from my 4G mobile phone. However, once I connected my Windows 8.1 64 bit computer to it, it blue screened with ...