48 votes

How can I buy end-user bandwidth for my customers?

For all intents and purposes, no, this is not possible. Even if it were, the technical and contractual logistics required would cripple your business. Think through this a bit more: Joe user at ...
EEAA's user avatar
  • 110k
28 votes

How can I buy end-user bandwidth for my customers?

Depending on the frequency at which you exchange data with the customer, it could be cheaper, faster, and more efficient to mail them a storage drive, then pay to have it overnighted back to you when ...
Ryan Griggs's user avatar
  • 1,013
27 votes

How is possible that the web site is down but the traceroute is ok?

The website runs on a server process. When you shut down the server process, the server does not magically turn off. Also not when you misconfigure your firewall (and block port 80) neither does the ...
TomTom's user avatar
  • 51.9k
21 votes
Accepted

A few websites are not reachable using Linux gateway

The netmask is wrong on the enp4s1 (WAN) interface. This system has configured an IP address of 49.x.x.x and a netmask of 255.0.0.0 (prefix /8). But this is not the netmask that your ISP gave you. ...
Michael Hampton's user avatar
21 votes

Why the discrepancy between Speedtest and Wget?

ISPs often prioritize traffic to speedtest.net so that they can brag how fast their connections are, while in reality, they don't provide that much bandwidth. They're perfectly aware that most users ...
bviktor's user avatar
  • 908
17 votes
Accepted

How can I buy end-user bandwidth for my customers?

It sounds like in effect you want to pay a users ISP to zero-rate traffic to your site, similar how to some cell carriers allow you to stream video from certain websites without impacting your ...
Jason Martin's user avatar
  • 5,093
17 votes
Accepted

Why the discrepancy between Speedtest and Wget?

In addition to the other reasons posted, TCP connections don't work well with large files when the bandwidth-delay product becomes large. Like on an otherwise fast connection to an island. See ...
Andrew Henle's user avatar
  • 1,282
15 votes

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

This solution applies Linux Ethernet Bonding to two independent OpenVPN connections from a local gateway server to a server in the cloud that you have root access to, like a Linode or a DigitalOcean ...
legolas108's user avatar
14 votes

What happens in the real world Internet - BGP and OSPF?

Typically, autonomous systems (ASNs) use an IGP (which can be OSPF, IS-IS or iBGP) so routers in their network know how to reach eachother. Networks connected to these routers and reachable through ...
Teun Vink's user avatar
  • 1,837
14 votes

Carrier Grade NAT concepts: IP bans

That is indeed one of the problems with CGN. Sharing a resource means that all suffer the consequences when one abuses the resource. A bank that I consulted for implemented IPv6 on the server side ...
Sander Steffann's user avatar
11 votes

Domain will not propagate (Over 96+ Hours)

I'm basically parroting Michael here, but this is too much to paste into a comment: ;sai.ngo. IN A ngo. 172800 IN NS b0.nic.ngo. ngo. ...
Andrew B's user avatar
  • 33.1k
10 votes

How is possible that the web site is down but the traceroute is ok?

Traceroute uses ICMP protocol to reach an address, and a HTTP server use HTTP protocol, different ports, and different approaches. I can reach an address via ICMP echo request but, if the port I'm ...
Eduardo Augusto Alves Ayres's user avatar
10 votes

Which ICMP types (v4/v6) should not be blocked?

All of ICMP should not be blocked. Not by default, this can be a deny list rather than an allow list. Start by rate limiting, but not otherwise filtering, ICMP. Read RFC 4890 section 3 on the ...
John Mahowald's user avatar
9 votes

centos VM unable to access the internet from hyper-V network

I had no internet connection on a fresh Centos 7 install. In my case it was because eth0 was down. Check the status of your devices with nmcli device If the ethernet device (usually eth0) is "...
Fax's user avatar
  • 191
9 votes
Accepted

MTR Report Analysis

20 seconds latency on any network would be a performance disaster for any kind of interactive work, if you had it. But you don't. You experience high latency (and packet losses) in getting ...
MadHatter's user avatar
  • 80.6k
7 votes

"RTNETLINK answers: File exists" /etc/network/interfaces Does'nt contain 2 gateways, so what's wrong?

I just ran into this problem and none of the solutions above worked for me. I couldn't change /run/network/ifstate because it was reset immediately to the former state. Also sudo ifdown eth0 &&...
digijay's user avatar
  • 1,235
7 votes

How can I buy end-user bandwidth for my customers?

TLDR: No it is not possible because it is likely to be illegal in the country you are operating in. The proviso of course being that if you are in the US, the FCC/Trump are currently in the process ...
Aron's user avatar
  • 208
7 votes

Why the discrepancy between Speedtest and Wget?

wget give good practical measure of the speed. The tests of Speedtest probably include kind of parallelism which can explain higher numbers. For good average speed test I think the time for download ...
Romeo Ninov's user avatar
  • 5,932
6 votes

How do captive portal network connections work?

There is a great description of this at https://www.arubanetworks.com/vrd/GuestAccessAppNote/wwhelp/wwhimpl/js/html/wwhelp.htm. Here's part of it: Captive Portal Authentication Process ...
dǝɥɔS ʇoıןןƎ's user avatar
6 votes

How do captive portal network connections work?

First for achieving the redirection, you need an inline authenticator (access controller). In context of your topic, you will need a Wireless lan controller if you opt for central management of AP. ...
Arjun sharma's user avatar
6 votes
Accepted

What is the best default-gateway for IPv6

Would it be better to only route 2000::/3 to the ISP as opposed to all assigning a default route. No. While Informational RFC 3587 is not a standard, it offers the following advice: RFC 2374 was ...
Andrew B's user avatar
  • 33.1k
6 votes
Accepted

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

As is noted already in the question, there is a conflict between the desire of not accepting incoming email and the idea of being able to contact the domain owner via email by convention-based email ...
Håkan Lindqvist's user avatar
5 votes
Accepted

How is possible that the web site is down but the traceroute is ok?

What Is a Virtual-Host? Some web-servers, like Apache, can be configured to use what's called virtual-hosting; essentially a local redirection service. In essence, it works like this: the web server(...
Alexander C. Solon's user avatar
5 votes

How can I buy end-user bandwidth for my customers?

Couple of points: Couple of GBs is not that large these days. Most universities are on a very good bandwidth connection anyways. I knew our Physics Dept. (Wisconsin, USA) worked on the ATLAS / LHC ...
curious_cat's user avatar
5 votes

How can I buy end-user bandwidth for my customers?

If you think you'll have sufficient traffic (think at a minimum several PBs worth month reasonably sustained), you could look at a "private peering" solution with their ISP (so traffic would go from ...
Richy B.'s user avatar
  • 213
5 votes

How widely deployed is carrier grade NAT?

My experience in the UK: Pretty much all mobile networks have been running "CGN" for years. EE (our largest mobile network) is now starting to deploy (AIUI it's postpaid only at the moment) IPv6 only ...
Peter Green's user avatar
  • 4,296
5 votes
Accepted

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

Do not use MAC address for security or authentication purposes. Those addresses can be trivially changed. Instead, implement a (or use your existing) network access control solution. These use some ...
John Mahowald's user avatar
4 votes

How to throttle your own internet connection?

If you are using google chrome or chrome based browser right click anywhere in the page and click inspect element or (Control + Shift + I) if on windows, the click the "network" tab, change the no ...
konzo's user avatar
  • 141
4 votes
Accepted

DHCP renew fail - internet drops every 2 hours

Looks like your ISP network admin has a broken config on DHCP. Standard setup for DHCP client is to call in when lease is half over to renew, and to keep trying until renewal takes place. The log ...
Jeter-work's user avatar
4 votes

Why the discrepancy between Speedtest and Wget?

One reason could be that often the maximum speed cannot be reached by just a single TCP connection. Speedtest.net recently introduced a single connection mode. Try this and see if it makes a ...
Josef's user avatar
  • 381

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