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Questions tagged [networking]

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

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DHCP server sending DHCPDISCOVERs

After upgrading to Debian 8 running isc-dhcp-server I began seeing these on the logs: servername dhcpd: DHCPDISCOVER from yy:yy:yy:yy:yy:yy (servername) via eth1 servername dhcpd: DHCPOFFER on xx.xx....
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1answer
20 views

Shared VPN on home server

I am looking into getting a VPN service, something like NORDvpn or similar but I want to run the app on my Mac server and route all my internet traffic from my MacBookPro's, Sky Q box, iPhone's etc ...
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1answer
12 views

Point domain to a computer inside LAN

Is it possible to, for ex.: point domain.com to 192.168.1.10 point domain2.com to 192.168.1.11 inside my LAN network? Or even more with port forwarding: point domain.com:80 to 192.168.1.10:5000 ...
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1answer
16 views

How do I get a PTR record for an MX that points to a different IP than the A record does?

MXToolbox indicates a warning that my smtp server's header banner fails to match reverse lookup for the stated domain. This makes sense - I've got a domain with the MX set to one IP (my mail server), ...
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0answers
10 views

Accessing IPv6 Only Network from IPv4 Network?

My ISP has provided me IPv6 only internet connection. If I connect from my IPv6 PC to IPv4 Internet I have no issues, because the ISP does all the IPv6 to IPv4 conversion. However, at home, on this ...
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18 views

Setting up virtual machines for practicing pentesting. Wifi adapter (D'link dwa125) wont allow bridged vm network

Im running Kali 4.18 as host and trying to set up a virtual machine running Windows XP SP3. There is no way for me to connect my desktop to the internet with an ethernet cable, I must connect via wifi....
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1answer
30 views

Safely perform TCP traceroute from user request

I need to perform a TCP traceroute using either the Linux traceroute or another package, but I'm struggling to find a way of making the request from PHP without needing sudo privileges. Because the ...
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1answer
46 views

Many routers behind main router cause slow internet?

I don't know if this is the correct place to ask, but here I go. We live with 10 people in 10 rooms in a 3 floor student house. Every room has an Ethernet connection. When I do a Speedtest I get an ...
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1answer
58 views

Asking college to unblock PS4 servers

My college has a block on various websites and all gaming servers. They explain that all of these sources waste a lot of data. Largely, all students who play video games in our college are on PC, ...
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1answer
61 views

Could this be a way to bypass my university's bandwidth restriction?

I'm in a student house that's managed by my university. To get internet, I need to connect an Ethernet cable from my PC to an Ethernet port in my wall. Afterwards I need to connect to the university's ...
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8 views

Can I restrict which processes have network access?

So, Sometimes I connect my PC to a mobile hotspot when the WiFi is down, because it happens often. And whenever I do, all these weird processes chew through my mobile data incredibly fast. Is there a ...
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0answers
23 views

issues with lan multiplayer games like call of duty modern warfare and blur [on hold]

I have a problem with some multiplayer games on my LAN. Some months ago I was playing Call of Duty MW and Blur on LAN with my friends and it hasn't had any problems. But from 2 or 3 months ago my ...
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13 views

Archer C3200 not routing between LAN ports

I am wondering if anyone has a solution for this issue. I am using a TP-LINK Archer C3200 WiFi router as an Access Point, like this: Internet-------wan:mainrouter:lan-------lan:Archer_C3200 ))))) (((...
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8 views

No connection between devices on the same WLAN access point

I have a very strange Problem. Sometimes I can not establish a connection between two devices when they are connected to the same AP. AP1: Huawei B528s-23a (AP/G4-Router/DHCP) Device1: Laptop ...
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0answers
134 views

Force Windows Update to use specific internet connection (Windows 10)

The question: Is there a way to force Windows Update to use a specific internet connection? I've tried ForceBindIP, but no dice. The situation: I'm using Comcast's gigabit internet service, and I'm ...
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2answers
33 views

Windows 10 can't connect with any browser except Tor

About two weeks ago I started having connectivity issues on my Windows 10 machine. Chrome, Firefox, Edge, and Steam will fail to connect to a site in nine out of ten attempts. Tor Browser has no ...
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1answer
17 views

How to re-enable Network & Sharing Center in Windows 10

I have a puzzling issue. My Windows 10 machine one day a few weeks ago started to have connectivity problems. Chrome, Firefox, Edge, and Steam have almost no ability to complete a web request (Can't ...
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0answers
14 views

Why a particular site is timing out on my chrome?

I have problem browsing news.ycombinator.com for almost a day. There are couple of other sites which are also erring out, while the others are working fine. What can be the reason ? Ping is ...
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0answers
28 views

Port forwarding with Miniupnpc [on hold]

I have Raspberry Pi on which I installed Apache Web Server (just basic installation with default homepage). I would like to access it outside of my local network. My router does not allow manual port ...
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1answer
36 views

Cascading two routers into the same subnet

There are two routers opeating in my house, the first is ASUS RT-87U, which is the primary router, and the second is D-Link DIR model, which is the secondary router. It is connected to the primary ...
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1answer
29 views

No internet after installing Hyper-V

I'm currently in Windows 10 Pro (1803). After I installed Hyper-V I had no internet connection (My windows 10 pro has no internet connection). I need to uninstall Hyper-V so as to get the internet. ...
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1answer
28 views

Change next hub on Comcast modem [on hold]

I’m really curious about networking and I have a question. Assuming that my ISP is Comcast , my modem will forward my traffic through its public address and if the host that I’m asking for it’s ...
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1answer
52 views

Undo routing table addition

I followed the instructions in this question to add an entry to my routing table to solve my collision problem while on a public Wi-Fi network. This is what I ran: ip route add 10.52.0.14/32 dev tun0 ...
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1answer
47 views

Why isn't my forced MAC address change working (Raspberry Pi)?

I'm working with Raspberry Pi Zeros on a subnet. I bought external Ethernet adapters for each one to connect them to one another. Unfortunately, these ethernet adapters all came with the exact same ...
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1answer
22 views

Unidentified network in Windows 10

I am setting up a simple Home network for education purpose. We have installed Windows 10 on of the computer and configured with IP address 192.168.0.X Subnet Mask: 255.255.255.0. And connected LAN ...
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0answers
7 views

Why “Connection-specific DNS Suffix” is only (default) available for wired connection, not for wireless

I understand what and how to set "Connection-specific DNS suffix", and I mostly understand the purpose. My question is just about why only certain network connection/adapter has it by default (even ...
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0answers
24 views

In Windows 7, Oracle VM VirutalBox giving a conflicted WORKGROUP?

I am running Windows 7 on a Dell PC. My PC network is set to Work and under the Work profile it has: Network Discovery - On File and printer sharing - On Public folder sharing - Off Media streaming -...
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1answer
50 views

Two internet connections in one house - Wifi and DHCP

Before starting, I would like to mention that my knowledge on networking is very basic. Feel free to suggest improvements for my network setup in any part of my question. I have searched the site ...
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1answer
48 views

How does a home router know the upstream address?

I've been recently told that you can change routers easily by simply swapping them. However, I was then confused to how a router knows the upstream IP address of the ISP?
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0answers
7 views

Windows firewall allow all except specific IPs

I'm trying to block specific ips from connecting to my service. Some poeple are attacking my services and I was hoping to automatically ban their IP when I detect the attack. Here is how I'm ...
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0answers
21 views

DNS lookup fails only on specific sites while using Arch Linux

The title gets to the core of the problem. I will provide more information though. I am running an install of Arch Linux on my laptop, and up until recently everything was going fine. I am was using ...
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0answers
30 views

Data Transfer Pausing to 0bytes/s and then going back up

I have these two MNPA19-XTR MELLANOX 10GB ETHERNET NETWORK INTERFACE CARD My two Servers 1. Dell PowerEdge R900 2. Dell PowerEdge T300 i am copying data from R900 to T300 These two servers are ...
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25 views

configure SFTP server with 2 nics

Centos7, dual NIC setup (one IP on 192.x the other on 10.x) I drew a diagram to help me explain what i want to accomplish I want to enable SFTP from the outside and enable SSH from the inside to ...
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1answer
47 views

Wierd WiFi Network called ALF [on hold]

I have lived in three houses in Florida with quite a bit of geography between them. This WiFi network called ALF pops up from time to time. I don't know if it is being generate by a device that I have ...
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0answers
11 views

Which interface to choose for data-replication?

Consider a 3 node setup with each node having 2x 10GB & 6x 1GB Nic. Data replication between nodes for VM's (proxmox). I prefer working with GlusterFS for ease of migration & backup/restore. ...
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1answer
23 views

mount sftp through blocked port using proxy

I'll apologise in advance, because I'm 90% sure this question has been asked somewhere before, but I can't figure this out, decide what's better and I'm completely unfamiliar with all of this. My ...
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0answers
28 views

Connecting two networks within an apartment building [on hold]

My friend and I each have an apartment in the same building, using the same cable internet provider. We'd like to access each others' network from them and so think that a VPN connection would be the ...
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1answer
15 views

Inconsistent single large file copy speed (W2k12)

The case is: 2 (identical) W2k12 physical blade servers,hosted on the same enclosure. connected via enclosure internal 10Gbe switch (Force10 MXL). Both servers are at the same subnet. Both servers ...
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1answer
17 views

How to connect one barcode scanner to multiple machines using USB & serial interfaces

Is it is possible to connect one barcode scanner to two machines to receive the same signal at the same time? In this case, either: barcode scanner to USB and serial port, or barcode scanner to USB ...
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0answers
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Is this network identity issue? VM cloning goofup?

An existing Vmware VM (x.x.x.1) was cloned , i.e xxx1 -> xxx2 OS: Win Server 2012 I'm able to RDP to both xxx1 and xxx2 (At RDP level looks like both nodes/device/ip are not confused?) ipconfig /...
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1answer
65 views

Proxy server at home, for web application access

I have an application on the internet that requests a proxy to access. I could buy one and put it there, the format he asks for is the following: http: // ip: port OR http: // username: password @ ...
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1answer
18 views

Hyper-V and a static IP address for Ubuntu VM

I have read numerous SO posts with this one being almost identical but I cannot get this to work. I have a single wireless NIC in my notebook running Windows 10 Pro 1803. This is configured with a ...
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1answer
32 views

How does iproute2's `ip link show` determine link state?

I have a network interface that ip link show reports like this: 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default link/ether 02:...
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0answers
33 views

Setting-up third-party VPN provider on Windows 10

I have been using the built-in Windows 10 VPN function to connect to my workplace via PTTP. Unfortunately, the VPN functionalities on Windows are limited, I am unable to see the status of the VPN in ...
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1answer
20 views

IPv6 prefix delegation

I'm a complete noob at IPv6, but have some practical experience of IPv4 (just because I had to deal with it). My home router is behind CGNAT so they don't offer public IPv4 addresses, but I'd asked ...
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1answer
19 views

Forwarding external traffic through LAN

I am trying to forward network traffic through a wireguard VPN into a VM running on another host. All that - while preserving original source IP address in order to achieve transparent proxying. Both ...
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2answers
44 views

DNS record setup on Digital Ocean and GoDaddy [on hold]

I am currently setting up a subdomain of a domain I own, to point to a Digital Ocean droplet I am renting out. In the Digital Ocean dashboard, there is a place to add A and NS records. But there is ...
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2answers
62 views

How can I access my home laptop's linux prompt through my router?

I have a router that is reachable from public internet and the IP address what I'm receiving from my ISP is the address on the internet. So I can easily do port forwards. I have a laptop with Fedora ...
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0answers
32 views

Cannot connect 3G/4G routers and USB 3G/4G modem with static(consistent) IP address but subnet mask different on every device

I have a problem with several data SIM cards communication. Situation: Architecture is five 4G/3G routers with Linux and one Fedora server with USB 4G/3G modem. Routers are supposed to read data ...
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0answers
26 views

Android Security - What exactly happens when someone renames a malicious apk to .jpg or .png or .mp4? [closed]

Suppose someone renames a malicious apk to .jpg or .png or .mp4. Now he/she sends this .jpg/.png/.mp4 file to other people via WhatsApp/Telegram/other messengers. Will the malware/spyware execute if ...