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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0
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2answers
20 views

NetBIOS packet probing (port 137). Does it come from the router?

For quite a while my machine's firewall has been detecting strange packets, seemingly coming from my router. I cannot explain this behavior. I suspect that somehow an attacker from the outside is ...
2
votes
2answers
768 views

How do I copy non shared files between Windows 7 computers?

Two computers running Win7 on a home network, let's call them MyDesktop and MyLaptop From any one of them, I can see shared files on the other. However, I want to supply my username and password on ...
0
votes
0answers
9 views

create a PPTP VPN server to act same as PureVPN PPTP server?

Our ISPs are providing us with private IP addresses so port forwarding is not possible , the are offering fixed IP but with extremely high price so the only option is to use VPN. I choose PureVPN ...
0
votes
0answers
36 views

Unable to ping anything on virtual machine

I got a virtual machine image for my course (there is a development env setup) and I can't create a same setup, so I need to use this. It's an older Arch Linux (uname -a says 2013) with 3.8.4 kernel ...
0
votes
1answer
5k views

Online computer not responding to pings

I was doing a bit of scanning on my network lately, knew all the hostnames to each computer connected. But whilst pinging one of them ping returned Request timed out.. This is strange as I know the ...
0
votes
0answers
15 views

Using Raspberry Pi as TOR Relay with VPN

I am attempting to accomplish multiple outcomes here: Configure a Raspberry Pi (B+ Model) as an XMPP server to utilize ChatSecure Configure a Raspberry Pi (Latest Model, yet to purchase) as a TOR ...
1
vote
0answers
10 views

Why is dhclient ignoring dhclient.conf?

I have the following problem I want to solve: I have multi homed system running linux, with three interfaces. All interfaces are configured by dhcp. The DHCP client is ISC dhcp 4.2.5 The DHCP server ...
0
votes
0answers
14 views

OpenVPN stops working if I change to another network

I have some trouble using OpenVPN. When it's running, everything is fine. However, if I connect to another network while it's still running, it won't be able to connect again to the server. I can ...
0
votes
0answers
19 views

IPSEC VPN between Mikrotik & Fortigate30D Device

I want to setup an IPSEC VPN tunnel between a mikrotik 912UAG device and a fortigate30D device so that anything connected on my mikrotik LAN is able to communicate to anything connected on my ...
8
votes
1answer
23k views

What does `Wake on Pattern Match` option mean in network card preferences?

I know Wake-on-LAN standard, but I don't understand the use case for Wake on Pattern Match option in the network card preferences. What are the advantages of it?
19
votes
9answers
65k views

Finding other computers on network over command line

I've got a handful of Macs on my home network, and shell access to only one of them from the outside. How can I figure out what IP address of the other machines are?
0
votes
1answer
36 views

Ubuntu 14.04.4 LTS Ethernet not working

I have installed Ubuntu 14.04.4 LTS on my desktop PC and immediately Ethernet goes off. That's my network configuration and some outputs: $ ifconfig eth0 Link encap:Ethernet HWaddr ...
0
votes
2answers
42 views

What could cause a computer's WiFi to be extremely slow?

My Dell Latitude E5400 laptop's WiFi is reasonable for general browsing, but when downloading large files it takes absurd amounts of time. I can download a 4GB file over Ethernet in 8 minutes, but ...
0
votes
1answer
10 views

DrayTek Vigor 2830 open port issue

We're using a Vigor2830 for routing VoIP/SIP traffic. One of the ports required to be open is 5090 for TCP/UDP. Going into the open ports section of the Vigor menu we have opened all the ports ...
1
vote
1answer
23 views

Can a desktop use a motherboard Ethernet port and a USB to Ethernet dongle at the same time

I have a computer I'm trying to connect to our network, but the motherboard Ethernet port is connected to some sort of security camera system. I'd rather not go unplugging systems I know nothing ...
1
vote
2answers
37 views

all outgoing tcp packets have source port 0.0.0.0

Currently I am connected to a network 169.254.x.x (a Hostel's Network) and there are three gateways that work as dhcp servers as well: 169.254.10.1 169.254.20.1 169.254.30.1 From a windows machine ...
1
vote
1answer
238 views

“iptables -P OUTPUT DROP” blocks DDWRT's web interface

When I do iptables -P OUTPUT DROP it blocks DDWRT's web interface. That is I am not able to access http://192.168.1.1 via Firefox. I put this rules before changing the chain policy to drop: ...
32
votes
4answers
6k views

How smart is my network?

There is an argument within my office about how smart/efficient the network we have set up really is. We have a fibre line and a cable line running into a load balancing router, which has a hardware ...
4
votes
2answers
4k views

Why does pinging a local router return “Destination Host Unreachable”?

I have two tomato routers. One is bridged wirelessly with the other. I have a new server on the network. It's running Ubuntu Server 11.04. They are all connected like this: A - Linux PC B - New ...
0
votes
1answer
23 views

Weird Internet Connection Issue

I'm experiencing internet issues all day with the following details: Skype works but can't log in (login probably requires dns). RDP connection to a server worked normally, but pinging my public ip ...
1
vote
2answers
2k views

netctl start asks for root password

Every time I do netctl start Newton (Newton is the name of my wifi network's profile) I get this message: ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units === Authentication is required ...
0
votes
1answer
10 views

2 VMware Fusion VMs: One hosting application, other one accessing it, host not involved

been searching around and haven't been able to find an answer for between two VMs (and what I've tried hasn't worked). Pardon the 'url' pretend it's 'http://' (can't post more than 2 links) Both VMs ...
2
votes
0answers
936 views

Bridging my VM with an OpenVPN adapter

Beginner user here,I start to slowly learn about networks, virtual machines and so. Here is my set up. I have a host system, running Windows 8.1. On my host system is installed OpenVPN, with a ...
0
votes
0answers
12 views

WatchGuard Firebox VPN will not connect if signed in as a domain user

We are trying to connect to a client's network using their WatchGuard VPN, and we are experiencing a really odd error which some other people seem to have had, but haven't shared their solutions. ...
1
vote
2answers
62 views

Download went much faster than my connection speed

I'm looking for an explanation to that mystery mentioned below. I'm not having a problem that needs to be solved. I have an ADSL line with speed as 8 megabits/sec, usually I get download speed as 850 ...
0
votes
2answers
3k views

OpenVPN tun0 extremely slow

I'm working in a vpn - the server is connected via a 16.000 mb/s line. Sure, this connection is really slow itself, but the vpn connection doesn't use the real bandwith. So i connected to the server ...
1
vote
0answers
31 views

Virtual Network adaptor which is always online

I'm not exactly sure how to word this, so please forgive me for lame wording. My situation is this: I have 2 identical docking stations, one at home and one at work. I run VMware Workstation 12, and ...
23
votes
8answers
193k views

How to bypass web URL filtering service to access blocked websites (proxy)

I'm using network, where services such as Gmail or any other e-mails, Google Drive, Dropbox, all social networks are blocked. Basically my goal is to access simply GMail, but I couldn't find any way ...
2
votes
4answers
22k views

Display all incoming connections on my computer to block certain IP

I want to block a certain IP address at my firewall which is connected to my PC, but I don't know what it looks like. Is there any way I can see a list of all IPs having connections with my PC? So ...
0
votes
1answer
14 views

Cannot route local traffic through local gateway

Microsoft Windows [Version 6.0.6002] Copyright (c) 2006 Microsoft Corporation. All rights reserved. C:\Windows\System32>route print ...
0
votes
0answers
25 views

Unable to forward ports to Raspberry Pi, but forwarded ports to Windows laptop work fine over the Internet

In my setup I have a Raspberry Pi, a Windows Laptop and a FritzBox 7490. I'd like to allow RDP to be forwarded to my laptop (which works over the Internet, tested with remote computer and a ...
8
votes
4answers
7k views

Mac OS X change IP configuration automatically by location (by Wifi network)?

Can Mac OS X be setup to automatically configure its Airport interface with a static IP address when connected to a Wifi network with a certain name, and on all other Wifi networks use DHCP? ...
0
votes
1answer
20 views

Sngrep Unknown File Format Error

I am attempting to use the sngrep utility on a Mac OSX El Capitan 10.11.4 and getting an error when I try to open any pcap file. The error is as follows: Johns-MacBook-Pro:Downloads gojira$ sngrep ...
1
vote
3answers
2k views

How to limit download speed per port on the network?

Greetings, I have several computers accessing the Internet at once. And with one download a file using a download manager (either bittorrent, orbit, etc.), the computer with that softwares grabs ...
1
vote
0answers
17 views

OpenVPN fails on different port

I have an OpenVPN setup with a linux server and windows client in mode-server with tap and over UDP. Everything works with port 1194. But I want to change to port 500. On my firewall I forward port ...
2
votes
1answer
3k views

no internet access on guest SSID on netgear WNR2000 router

I have a WNR2000v2 Netgear router that I want to put on our company's network. My boss wanted me to set up two SSIDs, one is for guests and the other is for employees. He wanted the guest wireless ...
1
vote
2answers
16 views

Can't decipher capture file

I'm playing with airodump-ng and wireshark (I'm not a networking specialist). I have captured some packets from my network with airodump-ng and wanted to open them in wireshark, but they seem to be ...
-1
votes
0answers
15 views

VirtualBox and Mac OS X internet connection trouble

I've read through the proposed solutions and network configurations and still can't seem to connect to the internet in my VirtualBox Ubuntu instance on my Mac OS X running El Capitan. You tell me ...
0
votes
4answers
3k 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
votes
2answers
5k 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). ...
-1
votes
3answers
36 views

Is my NAS secure if no internet access is allowed?

I have a Synology DS214se, with DSM 6.0 update 3 installed. QuickConnect is disabled and I haven't added any external access permission. Is my NAS safe from attacks? I was wondering if I should add ...
0
votes
0answers
13 views

DC network location, when gateway is VM on same box

I know the dos and don'ts of domain controllers, and my setup is most certainly ill advised, but when running this kind of setup from home, on the cheap, I have little choice. I have one physical ...
3
votes
5answers
47k views

Juniper Network Connect (VPN) on Windows 7

My company uses Juniper networks for vpn access. I am unable to get the juniper network connect client to work on windows 7 64-bit. It used to work before but after I formatted my system it gives the ...
2
votes
2answers
19k views

Access Cisco VPN with Ubuntu 14.04 64bit

I have to connect to a Cisco VPN with Ubuntu 14.04, starting with a pcf configuration file and the user credentials. I installed network-manager-vpnc, created a new connection importing the saved ...
-1
votes
0answers
28 views

Backbones and subnets [closed]

I need some help with an assignment for college. I need to create a virtual network using VirtualBox that resembles this scheme. The requirements are that Subnet A consists of Server A and Client ...
0
votes
0answers
29 views

Batch ping to find fastest server

I have a list of about 200 IP addresses in a file. I want to know which one I have the lowest ping to, as they are game servers. Is there some way I can ping all of them and have the output be the ...
8
votes
5answers
11k views

How to monitor internet connection for interruptions - for Mac OS X

I have subscribed to a new ISP and I am experiencing problems with this new ISP. The problems are several micro interruptions on the internet connection, kind of lags, that is probably related to ...
0
votes
0answers
42 views

My Macbook can't send out OPTIONS request anymore

I guess this is a rare issue since I have googled the answer for days but seems like no one has run into this before. What happened is my computer could make OPTIONS requests out to remote servers ...
0
votes
0answers
32 views

Windows 7 DNS lookups failing and fixing themselves

I have one user who is sporadically unable to complete internal DNS queries and the problem fixes itself within 2-10 minutes and this problem has been lingering on for a couple months. I haven't been ...
7
votes
3answers
40k views

I have LOTS of TAP-Win32 Adapter OAS and TAP-Windows Adapter V9

What are these, and what are they used for; how do I get rid of this? Because I haven't got OpenVPN or any other VPN-client installed on my computer (to my knowledge). I am not sure but I thing this ...