Questions tagged [internet]

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (often called TCP/IP, although not all protocols use TCP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies.

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RDP crashes when another user is logged in

I've been experiecing a problem lately with RDP. The situation: I have 2 accounts on my Win10 Pro machine. A personal one and one for work. I use RDP to connect to my personal account but RDP crashes ...
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1 answer
549 views

TCP DUP ACK/Out-of-Order/Previous segment not captured/Retransmission flooded on wireshark logs

Due to slow network, I installed wireshark on the device(laptop) to find this This is a log of the device using internet(Downloading a file),as you can see at the right end of the screenshot, the ...
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4 votes
1 answer
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Which ICMP types (v4/v6) should not be blocked?

I have made a lot of research into this and have found that some references contradict each other. IPV6 For example RFC4890 says the following types should be allowed for optimal functionality: Type ...
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BIND9 server for a network with no internet access

The question I have is the same as this one, but the accepted answer, and the comments did not helped me solve my issue. I'll put here the whole setup that I have. BIND9 version - BIND 9.11.5-P4-5.1+...
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Client connects to my L2TP server but does internet not work

I created an L2TP server via this script: https://kayama.dp.ua/blog/ubuntu-16-04-how-to-setup-l2tp-over-ipsec-vpn-serv.html the client connects to the vpn but fails to navigate Configuration apt-get ...
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2 answers
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Why does facebook only have 2 IP addresses? [closed]

In the process of setting up DNS for my own website I got curious about looking up a large company's DNS record. I chose facebook.com and used dnschecker.org to view their dns record. Ignoring AAAA ...
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VoiP SIP trunk to Cisco RV345 and SG200-50 Switch epic Fail

Im having some serious trouble with VoiP phones that are sip trunked over the internet. I.E. we do not have an On Premises PBX. Every thing from the provisioning to the calls is done over the internet ...
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1 vote
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Are their public IP ranges which don't belong to any country?

I've been working on project and we use IP geo-location using an API to identify user's country. The legacy code has an edge case when there is no country information for a particular IP. I have been ...
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2 votes
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713 views

Static IP - Destination Host Unreachable

I'm a newbie to system administration. I've installed remotely a Dell server using iDRAC interface. Server's ip is 200.159.243.146 and everything is fine with it. Using this interface I've installed ...
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-2 votes
1 answer
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How medium-sized servers are connected to the internet?

I'm curious about how the servers are connected to the internet. Suppose I develop a web application that requires multiple machines to provide services. For example, I want to host the frontend on a ...
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Load Balancing - Dual WAN and Static IP

I run a small business and we use a lot of AWS services (including transcoding large files) we have two internet services in the office. A) Is a business broadband service with static IP, B) Is ...
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Windows 10 multiple Ethernet connections with one being connected to the internet but PC doesnt connect to the internet [closed]

I have a win10 machine in a rural area with no ability to connect to a private network. The computer is used to track measurements of specific sensors which are connected with ethernet to the computer....
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1 answer
314 views

Outbound Internet Connectivity for VMs on Azure: Virtual Network (with Default Config) vs NAT Gateway

I'm running some VMs on Azure inside of a Virtual Network that I manually configured. For the most part, these VMs just run unattended and if I ever need remote access to them, I just assign a public ...
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2 votes
1 answer
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Observing conflict on VPN when multiple users on same network attempt to connect and access EC2 Instance behind security group

We have external services that are behind an Amazon EC2 security group, users connect to a VPN (this is supplied and maintained by a third party) so that they are given an IP that is consistent over ...
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-3 votes
1 answer
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Is it feasible for a mobile app like a peer to peer torrent app to discover peers via Internet, not just direct Wifi? [closed]

If I create an app that will be installed on different devices (Windows, Android, Apple). Different devices will be connected to Internet via different ISPs. Mostly devices will have changing dynamic ...
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2 answers
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Do modems have public address? [closed]

I know for a fact that when we are connected to Wi-Fi and we search something in the Internet, the server we are requesting from will return the files to our IP address and this IP address is the ...
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1 vote
0 answers
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Internet goes down when someone access our URL?

Setup: Have a metal server in our office closet, host OS is windows 10. It hosts 4 VMs, one of which is an internet facing application and accessible via URL. The server has 2 network cards, the first ...
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3 answers
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Internet speed required to use Microsoft Teams from Japan to the USA [closed]

I really hope this is the right place to ask (this is my first question here so please go easy). I have a great opportunity to go to work remotely (HR signed off on it) from Japan. I have a place to ...
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How to set-up a secondary/redundancy LTE internet connection?

We're a small-medium office in Vancouver Canada, and we're looking to set-up a secondary/redundancy LTE internet connection. We're looking at purchasing the Unifi Dream Machine Pro to solve this issue,...
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1 vote
0 answers
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How to find the route that has internet connection and set it as default (lowest metric) with NetworkManager (Ubuntu)

~$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 192.168.30.102 0.0.0.0 UG 100 0 0 eth0 default ...
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1 vote
1 answer
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IPv4 Address Range Shortage Inquiry

Recently I was looking over RFC6890 (link here) to find out more about the current IP addressing schemes that are in place and noticed a rather large IP address range that is listed as "Reserved ...
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Where can I get outage updates/alerts for transoceanic cables (and other tier-1 fiber backbones)?

Is there some site that aggregates status updates from the companies that manage the transoceanic fiber cables so that I can get a world view of global internet outages that break connectivity between ...
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0 votes
1 answer
186 views

RRAS server in Azure - internet access

This question seems to have been asked before but I cannot get this to work no matter what I try. I have a Windows Server 2019 VM in Azure running RRAS. I have configured the server using SSTP and ...
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-1 votes
1 answer
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DHCP Server stops handing out leases

I currently have a DC running Windows Sever 2008 R2 (yes I know) and for the past two weeks, when employees travel back to the office, they can't connect to the internet unless I do one of two things. ...
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How can I easily (e.g. as easy as rsync or SCP) do a high speed (1gpbs) file upload over an Internet-latency link?

I recently asked a similar question about how to transfer large (many gigabyte to many tens of gigaytes) files over the Internet when latency is high. I got a great answer, but only for downloads. ...
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2 votes
1 answer
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OpenVPN "redirect-gateway def1 bypass-dhcp" setting kills SSH access but is needed for internet access

I am running an OpenVPN server on Ubuntu on AWS with the following server.conf: local x.x.x.x port 1194 proto tcp dev tap ca ca.crt cert server.crt key server.key dh dh.pem auth SHA512 tls-crypt tc....
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3 votes
1 answer
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Two or more hosts in traceroute answer

Hi I have strange behavior of a traceroute to one of my public IP's In one of a line I have multiple hostnames with timing like in the folowing example, on the 5th line traceroute to dns.abc.com (111....
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1 answer
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RTNETLINK answers: No such device /Wireless card /kali linux

I've got an issue with alfa AWUS036NH. I cannot set it up. I get info : "No such device" or "Input/output error". I used command : "sudo ip link set wlan0 up" Kali version :5.5.0-kali1-amd64 release:...
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-1 votes
2 answers
325 views

Can a server behind a load balancer get responses to its requests? [closed]

Assume there are two servers A, B that are behind a load balancer, for example, they could be two docker containers. If server A makes an HTTP GET request to some-site.com, it is possible that the ...
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7 votes
2 answers
243 views

How to responsibly discontinue receiving email at an old Internet domain?

My organization owns Internet domains that we no longer strongly use. Web requests typically simply redirect to our main corporate website, and except possibly as described below, there is no ...
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-3 votes
1 answer
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i want to visualize myself about bandwidth of internet [closed]

as we know bandwidth is just a way through which data flows.20 Mbps internet means 20 mega bits per second and 40 Mbps means 40 mega bits per second.i guess 20 Mbps means 20 Mb of data is retrieved in ...
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0 votes
1 answer
452 views

Is it possible to know the location of an Anycast IP since they can be at multiple places at the same time?

With a Unicast IP we can know the geographical location of an IP address easily. But an Anycast IP address can be at multiple locations at the same time and depending on how close you are to the ...
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0 answers
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Internet packages went crazy

So... I have a router (wireless, ASUS RT-N18U), connected to 4 pcs via cable and 1 tablet wireless. After I noticed some performance drops in my network speed, I checked the traffic manager. The ...
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0 answers
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VoIP phone only working in one direction

Ahoy friends. Currently i got 2 networks connected via routing. I got a VoIP device connected to one of the networks, to be routed to the other one. Everything else is working on this configuration of ...
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1 vote
1 answer
122 views

How to determine whether an internet connection is wired or wireless?

I work in the IT department for the residential housing area at my university (network operations is separate from ours). I've wondered how is it that when someone registers a MAC address on our ...
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3 votes
3 answers
1k views

Are there good ways to transfer very large files (2TB) over the Atlantic?

My company regularly needs to send about 2TB of data from the US to the UK (the size of the compressed delta is 2TB). Even though each side has good internet connectivity, sending files directly is ...
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0 votes
0 answers
107 views

Changing DHCP range makes me lose internet access

Hy, I'm trying to increase my network ip address from: IP DHCPIpv4: 192.168.1.10 - 192.168.1.250 Mask: 255.255.255.0 Server: 192.168.1.254 Gateway: 192.168.1.254 To IP DHCPIpv4: 192.168.0.10 - ...
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0 votes
1 answer
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Is there a way to block internet access using iptables for particular access points

In our company we have several access points. For some of them in the production area it should be disallowed to use them for accessing the internet. The router we have has (at least) two interfaces: ...
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1 vote
3 answers
1k views

What exactly is the difference between public and private IP addresses? [closed]

Everywhere on the Internet the same answer is given, private IP addresses exists only inside your network and public IP addresses are what everyone sees on Internet. What exactly do they mean by the ...
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1 vote
1 answer
526 views

How can I easily (e.g. as easy as rsync or SCP) do a high speed (1gpbs) file transfer over an Internet-latency link?

A few times per year, I need to transfer massive files (20+GBs) over the Internet (latency 20-100ms), but with reasonably fast connections on the order of 1gbps between servers. Unfortunately, when I ...
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0 answers
76 views

Microsoft Azure | Internet Connection Problems

I have 2 Virtual Machines on Microsoft Azure and I have the same problem with both of them... I can't use internet, when I want to open a site on Windows, it says 'This Site Can't Be Displayed' and I ...
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0 votes
2 answers
67 views

Setting up a subdomain to a distinct server

I am setting up a subdomain on Google Domains in the form subdomain.mydomain.com, so that this URL lead users to my server (AWS EC2 instance). In Google Domains I can configure subdoamins with ...
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1 answer
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OpenVPN connection ok but no Internet access

I'm learning to use OpenVPN and I bought a VPS with OpenVPN (a default installation offered by the hosting provider). When I configure my client to connect to the server, I notice that the connection ...
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1 answer
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No internet on secondary router in cascaded router setup

I recently bought a Cisco RV130W router and plan to use it as a secondary router in a cascaded router setup. I want to do this so I can isolate my own devices (NAS, printer, PC, Laptop) and prevent ...
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0 votes
1 answer
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How do domains connect to internet and email (servers) globally?

I know of domain name registrars, that you can use them to acquire your own domain name for a website; but, how do they connect to the internet and email (servers) globally? I'm not exactly sure how ...
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2 answers
5k views

OpenVPN works well with mobile data, but can not connect through ADSL

I've installed OpenVPN on a CentOS machine and created a user on it. Then I installed the client software on my PC and tried to connect to the VPN. The strange problem is that when I am using the ...
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0 votes
1 answer
616 views

How to diagnose source of website blocking?

When accessing sites through my ISP, certain sites don't load. The DNS resolves fine (via nslookup; also, the hosts file is fine), but then accessing them through any port times out (eg. tracert or ...
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4 votes
1 answer
9k views

Debian static ip, can not bring up interface: "RTNETLINK answers: File exists"

I have a fresh installation of SELKS(Debian 9) and I configured the network manually, but I can not bring the interface eno1 UP. I get the error: RTNETLINK answers: File exists ifup: failed to bring ...
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7 votes
2 answers
13k views

How to Bond Two (Multiple) Internet Connections for Increased Speed and Failover

We are located in a rural area with two slow ADSL connections (3.5/0.5 Mbps) and wanted to improve connection speed and reliability by somehow "combining" them. The following describes our solution ...
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-1 votes
1 answer
60 views

Connection to server blocked for no reason [closed]

I have had a VPS in NL for the past 5-6 years and it's been working great. Now one day I suddenly can't access/ping/anything the VPS from my home connection (tried different computers) The confusing ...
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