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

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Unable to see broadcast packets with tcpdump

I am launching an application which broadcasts udp packets. I also have a simple python script to confirm that these packets are being broadcast: sock = socket.socket(socket.AF_INET, ...
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0answers
5 views

I can't access my DVR remotely

I installed HKVision security cameras some time back. I formatted my computer a week later. Before formatting, I had port forwarded the DVR I.P address, so I could access the live feed and recorded ...
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8 views

2 Nics setup on CentOS 7

I have problem with 2 NICs when I try to setup new webserver on CentOS 7 ==== My goal ==== I have 2 network cards on server, eth0 (for public ip) and eth1 (for internal ip) My goal is my server can ...
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1answer
6 views

Is it possible to rename linux network namespaces

Is it possible to rename a linux network namespace. I am using ubuntu server 14. I just created a network namespace and configured it, but would like to rename it.
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0answers
16 views

OpenWRT: Wireless bridge not working

i'm struggling trying to get 2 Routers connected via wireless. What i'm really trying is to extend my home's wireless network coverage by linking a Client router to a Master router which is already ...
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0answers
14 views

Why would a portion of a website work outside my LAN, and not inside it?

So we have a website at work that no one inside the work LAN can use. Our customers can use it. I can use it if my phone is on LTE. I can't use it on WiFi, through an ethernet connection at work, or ...
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0answers
13 views

PCs on LAN use Wi-Fi acces point as DNS server

I have the following setup with: TP-LINK SafeStream Gigabit Broadband VPN router TP-LINK TL SG1024 switch TP-LINK Archer C5 Wi-Fi router TP-LINK Archer C7 Wi-Fi router All routers are connected ...
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1answer
16 views

I bridged my wireless and LAN connections on my laptop and connected it with my desktop. Why is my desktop not recieving an internet connection?

I am trying to connect my desktop to my laptop with an Ethernet cable to use the laptop's internet connection. I have followed the instructions of one article to bridge the LAN connection and wireless ...
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2answers
17 views

Home Fibernetwork setup vs Traceroute results - where is my WAN IP located?

On my learning with using traceroute, I have actually put it to practical use with my current home network setup trying to figure out what are the available hops and IPs assignment but have ...
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0answers
8 views

Sending data through Telnet established connection on windows command line

I have connected to an outside server using telnet on windows. I have a program written in Ruby running on my local machine whose output needs to be passed as a command in the server running. How do I ...
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0answers
15 views

making a tiny datacenter in home [on hold]

I would like to create a data-center at home. My goal is to host a file sharing website like mediafire or mega that can handle about 1500 users at the same time. I would like to know if my current ...
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0answers
6 views

How to connect an adsl modem router to an unifi ap?

I have an adsl wireless modem router ( DLink 2750u ) which i want to connect to Ubiquity Unifi AP (Access Point) My broadband line directly connects to the adsl router i.e i donot have any switch. I ...
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6 views

IPv6 inverse neighbor discovery doesn't work

I read RFC 3122 which is about IPv6 Inverse Neighbor Discovery. And I want to test it. So I construct an IND Solicitation packet and send it to Debian 7.2. However I never receive an IND reply. My mac ...
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0answers
10 views

Link aggregation…?

I know variation of this have been asked before but I think this is a variation that hasn't been explored thus far. I have 2 unstable broadband connections available to me - one ADSL and the other is ...
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0answers
13 views

Fibre Optic Broadband - ENT and ONT mounted in meter boxes

Good Day, I am in New Zealand and getting my house rewired. I am trying to appropriately future proof my house for LAN and be ready for ultra fast fibre broadband when it becomes available. My ...
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0answers
23 views

Disable VPN for certain programs

I need to have a VPN connection open for a customer I work for. While working I like to listen to some online radio. When the VPN connection is open all of my traffic is being routed through the ...
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0answers
8 views

Log remote IPs/FQDNs connected to FROM a Windows server

We have a network that is locked down heavily and the servers have no internet access. In out HIDS system, we see repeated attempts to connect to CDN IPs. I'd like to get a list of what ...
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0answers
10 views

Measuring squid proxy bottleneck / requirements

We want to setup a squid proxy server in our company. There will be about 40 parallel connections (20 mobile devices, 20 desktop/laptops). The total bandwidth we have is 6mbps (behind a cisco router ...
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5answers
677 views

What ports are used by an application [duplicate]

I'm testing an application which opens its own ports (acts as a server for these ports, hence listens at that ports) and where the same application connects to ports bound by other applications (acts ...
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19 views

Why does my laptop get a really slow internet connection but my other devices (ipad,phone) work perfectly connected to the same router? [duplicate]

So I bought a new router and it has a really fast internet connection. It works perfectly on other devices but on my laptop it runs really slow. I have tried to unplug my router and restart my laptop ...
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0answers
9 views

How to forward external port to Kali Linux?

I have an issue about networking. My previous question was about how does metasploit payload work? And I got right answer( I have to redirect port to internal ip which corresponds to Kali Linux's ip). ...
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0answers
12 views

internet traffic slow through switch; VOIP issues too

There's already a post about this, but the solution to that one didn't work for me, so here's my version: We have Cox cable internet, 100mbps | We have a Sonicwall TZ 215w | We have a netgear L2 ...
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0answers
21 views

Multiple IP source on single interface in Linux [on hold]

We could set multiple IP addressses on single interface, for example using NetworkManager: How to make any connection to outside of this PC to use different IP? for example if I have 8 IP ...
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0answers
8 views

NAS Backup Drive Virus Isolation

I have a small NAS that currently has several network shares that get backed up. I also have another share that is of the USB external HDD I have plugged in to the NAS. I want to know if I run regular ...
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1answer
22 views

Is it worth using Cat6 cables with existing Cat5e wiring? [duplicate]

We are currently in the process of installing a new Wi-Fi repeater in our house. Our house was built with Cat5e cabling in the walls, conveniently going from the location of our current router to our ...
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17 views

Cannot see Win 7 PC on LAN but it can access Internet

I have a Windows 7 (64 bit) on one room that has a printer attached. I have been going through the LAN from my desk (which also has Win 7 64-bit) to print for a long time. Something has changed, but ...
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1answer
19 views

Null Session Share not working on Windows 7

I have a computer running Windows 7 SP 1 Ultimate (IP 192.168.11.100). I need to create a Null Session Share (named WIA_RIS_SHARE) for Serva PXE Server to be able to install Windows XP via networking. ...
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1answer
14 views

Finding the IP Address of a Router in a Daisy Chain

I'm trying to forward a port to my home computer so I can SSH to it when I'm away from home. Because I cannot get a good connection to my modem/router, I have to connect a second router to it. My home ...
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1answer
13 views

Why doesn't iptables accept IP address as source?

The command sudo iptables -t nat -A PREROUTING -i eth1 -s ! 192.168.178.30 -p tcp --dport 80 -j DNAT --to 192.168.178.30:3128 fails with Bad argument `192.168.178.30' Try `iptables -h' or ...
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0answers
13 views

How to redirect all traffic from one network interface to another on the same linux host

I am writing testcases for a network switch. This involves sending something on one network card (via the switch) and checking that it is received on another network card. I want to disable all direct ...
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2answers
23 views

Connecting two routers to create two home networks causes issues

My cable provider provided us with a gateway modem that has it's own built in router. I need to set up two local networks, one for guest and one for admins. The reason is because I have a Western ...
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4 views

Share a tun0 interface between docker containers

I've successfully built a working standalone openvpn docker container: # docker run --detach --publish 100.1.1.1:443:443 --name foo_openvpn --cap-add=NET_ADMIN --device /dev/net/tun -v ...
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1answer
21 views

Accessing a computer behind a router from the Internet

I have a manufacturing machine that uses PLC's. One of the PLC's needs to have programming updated. PLS'c are updated using proprietary software sold by the PLC maker. In this case the software is ...
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1answer
18 views

Route traffic from specific application to a different port

I have an application called Server on localhost which binds to port 1000. I have another application also on localhost called Client which connects to 1000 in order to communicate with Server. I am ...
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1answer
20 views

ProcMon - catching incoming file accesses from the network

I'm currently using procmon to chase down a problem I'm having involving network files. Another PC on the local network writes small "command" files to the target machine, which then consumes them - ...
2
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1answer
19 views

Man in the middle using iptables

I wish to test a subsystems which communicates with another subsystems via tcp. I have used the following: "iptables -A OUTPUT -p tcp --dport "+port_number" -j DROP" to stop the traffic on a port ...
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1answer
10 views

How can I access files on Windows Server from using a web proxy Pfsense?

I have over 25 pc's all with W7 and XP, using a web proxy based on Pfsense. Someone told me(my boss) that I need to open the port 445 to access the Windows Server 2012 R2 that is located in another ...
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1answer
15 views

Custom Windows shell hosted on the network

We have a custom kiosk-style executable that we are using as a shell on Windows 8.1 machines. We'd like to host it on the network so that it's easy to update as desired. The problem we have is that ...
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24 views

Disabled firewall on a Asus router and now can't connect

I have an ASUS RT-N12 wireless router with WAN web access. A dummy of the router web interface can be found here. I had "Enable Web Access from WAN" on and was able to access the web interface via a ...
1
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1answer
15 views

Why did I get this output while using traceroute with openvpn?

I set up a vpn using openvpn command with a certificate bundle downloaded from vpnbook.com. Then when I did traceroute www.google.com I got all stars output. I want to know why I got that output. ...
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2answers
49 views

Wifi router bridging

My primary router is HG 8247 Huawei ONT Device with primary gateway 192.168.100.1. I want to extend its range using a TPLink WR740N i have lying around. I have done the following without success: ...
2
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0answers
13 views

Mac OSX unable to SSH connection reset by peer

I have an SSH server running at home and I am trying to connect to it from school. But when I try to connect I get: ssh_exchange_identification: read: Connection reset by peer However, when I ssh ...
2
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1answer
16 views

Can PXE be run over a multi-port bridged nic?

I have a system which i've configured and tested with one ethernet port that acts as a PXE server, and it works. I also have a quad port nic sitting around I'd like to utilize so I've been wondering ...
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0answers
16 views

Wireless router error 'cable unplugged'

I bought a wireless router and set it up, it worked the first time, but I forgot the admin password so I had to hard-reset the router. After that it's unable to connect to my ISP again, it keep says ...
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0answers
21 views

Can I access this network? [on hold]

I want to access this course - https://graphics.ethz.ch/teaching/cg14/notes.php but I when I click on any of the slides it gives me this error - ...
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1answer
20 views

How do I change the order of WiFi Networks in Windows 8.1 to give priority to one over another?

In Mac OS X you can change the order of remembered wireless networks by moving them up and down the list. This will change which WiFi network gets connected first. I can't seem to find the equivalent ...
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1answer
30 views

Data from two modems for faster browsing?

I'm stuck with DSL Lite (a slow Internet connection). Is it possible to speed up my AT&T 'DSL Lite' connection by augmenting it with some bandwidth from my Cellphone's tethered 'hot-spot' ...
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0answers
9 views

Can I bridge 3 Internet Connections in Windows 8

I have 3 DSL connections with three different modems which goes into three different lan cards. Now I have seen in some sites that you can bridge these three connections into one. So using bridge ...
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2answers
40 views

Can't ping computers via a bridged connection

I've got the following setup: PC running Windows 8.1 with a Wifi card connected to the local network and an ethernet cable running to a laptop. Wifi and Ethernet connections are bridged. Laptop ...
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0answers
18 views

usb0 network interface does not show up on Debian 8

I'm trying to get USB tethering to work between a Nexus 5 phone (running CM11) and my desktop running Debian 8. I connected the phone to the computer via USB and got these messages: [14972.580738] ...