An Internet service provider (ISP) is a company that provides access to the Internet. Access ISPs connect customers to the Internet using copper, wireless or fiber connections.

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311
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4answers
51k views

Who provides the Internet service to Internet Service Providers (ISPs)?

I've been wondering recently about how the infrastructure of the Internet really works. I know that I have an Internet Service Provider (ISP) that supplies my connection to the Internet. But what ...
183
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24answers
9k views

What are some options for transfering large files without using the Internet? [closed]

My employer's Internet connection is extremely slow. It's a $6,000 a month, 9 Mb, bonded T1, shared by over 150 users. It's not untypical to see regular file transfer speeds of 20-100 KBps. And ...
52
votes
4answers
3k views

How to prevent my ISP from putting every website in a frame?

My ISP has a bad habit of putting every page I visit into an iframe so they can overlay it with their commercials etc.. (I'm guessing they are using a transparent proxy to do it) Is there an add-on ...
38
votes
5answers
2k views

What keeps you from changing your public IP address and wreaking havok?

An interesting question was asked of me and I did not know what to answer. So I'll ask here. Let's say I subscribed to an ISP and I'm using cable internet access. The ISP gives me a public IP address ...
16
votes
2answers
667 views

How do I block my ISP from framing websites? [duplicate]

I've noticed recently, as of today, that all the websites I visit (except for a specific few sites such as Google) are all put into a frame. I'm not sure what the reason for this is, there are no ads ...
14
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5answers
23k views

How much information can my ISP see?

Is it possible for my ISP to see the passwords that I enter on websites and in chat programs? And what about SSL websites that start with https, do they encrypt my username and password before ...
14
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5answers
26k views

Why is my DSL connection so slow, when my neighbor's is much faster?

I've just moved into a new house (new for me; the house was built in 2006). I've purchased DSL service through AT&T, paying for speeds "up to" 768 Kbps downstream / 384 Kbps upstream. My issue ...
13
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4answers
31k views

How can I monitor my ISP's connection quality over time?

I've got a very bad ISP and want to monitor the connection quality over a month's time. At the moment I just wrote a script which logs ping requests to Google's DNS server 8.8.8.8. How can I do ...
12
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8answers
1k views

Is it possible to merge my ISP and cellphone Internet access? I want to split download and upload [duplicate]

I would like to use my ISP for download only, and my cellphones 4G connection for upload only. This is because my ISP's upload speed is poor, but download is OK, and my 4G upload is great and free (I ...
10
votes
4answers
26k views

How to effectively diagnose ISP throttling (or other ISP related issues) and what to do about it?

My question is a bit general but I assume there has to be a good, specific answer to my problem. I, like many, am beginning to wonder if my ISP is throttling my home internet connection. I'm not so ...
10
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6answers
5k views

Is it possible to find out which upstream DNS server my router is querying? (just using dns tools)

Ok, here is the setup: I have a local router which advertises itself as the DNS server over DHCP. The DNS resolver on the router just forwards the requests to the ISP nameservers and caches the reply. ...
9
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3answers
8k views

Why does my D-Link DSL-2730U router claim the firmware update “contains an illegal image”?

I have a D-Link router. Its software (firmware) causes a lot of problems so I try to update it. My router model is DSL-2730U so I downloaded the original firmware from this site: ...
8
votes
6answers
5k views

How can I circumvent BitTorrent throttling?

My ISP is a reseller of Bell Canada DSL service. Bell uses Deep Packet Inspection for all of its users and resellers to limit the bandwidth consumed by P2P applications such as BitTorrent. Bell ...
7
votes
4answers
42k views

Is there a simple way to detect ISP port blocking?

Is there a way to tell the difference between my ISP blocking traffic on certain ports and my NAT router/firewall blocking that traffic? The sites “Shields Up” and “Can you see me” show my ports ...
6
votes
3answers
6k views

Can an ISP provide two static IPs over a single cable?

Can an ISP provide my home or a business with two static IPs over a single cable connection so that they may be used simultaneously? If so, can someone point me in the right direction to understand ...
6
votes
1answer
281 views

monitoring ISP bandwidth data

On Windows/Linux, what would be a way to run a sample measurement of the bandwidth that I have available? I need to run a measurement at periodic intervals. There are many website which will give you ...
5
votes
3answers
416 views

How to disable Comcast mistyped address page?

I upgraded my Firefox to v7 (I am on Ubuntu if this matters). Before, I could type in the address bar "ebay" or "gmail" for example, and it would take me to those sites. After I upgraded, it redirects ...
5
votes
4answers
7k views

Does my ISP know what sites I am visiting? [duplicate]

I am using Google Chrome in Windows 7 for Internet access. I am very curious to know if my ISP knows or not which sites I am visiting or what I am downloading. If it knows then to what extent (meaning ...
5
votes
3answers
5k views

Upload Download speed difference [duplicate]

When I test my hi-speed, I get (approx>): 9.7 Mb/s download .51 Mb/s upload 8ms ping. Why is there such a disparity between down load and up load?
5
votes
3answers
7k views

Hosting a web site at home: ISP Blocking port 80?

I presume this is a better place to put this rather than server fault. I'm interested in setting up a small site to host at home as a "proof of concept" exercise, i.e. to prove that I know how to do ...
5
votes
3answers
186 views

Can my ISP intervene or force me to see something beyond my control?

My ISP is the largest in the country and known as SLT (Sri Lanka Telecom). Through a single router/ADSL Modem, we have a small home network. Lately, I see a message appearing from my ISP asking me ...
5
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2answers
202 views

My ISP responded to my request with another user's content, is that permissible? And if not, how can I prove it?

Over the past 3 months, I've had two instances when I visited stackoverflow.com only to discover myself logged in as a completely different user. This seems to have happened to others as well. In that ...
5
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3answers
5k views

How does geolocation based on IP address work?

As all Internet users, I've visited web sites which appear to know in which country and city I'm located. I understand that these web sites typically look up my IP address in a database which maps IP ...
4
votes
5answers
8k views

Is there any way to bypass ISP-based redirection of webpages after credit finished?

My ISP has different Internet plans and some of them are limited traffic and once the monthly traffic has reached, any webpages will be redirected to a specific IP address showing that the credit has ...
4
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4answers
379 views

ISPs hijacking DNS errors on the web

I've noticed that ISPs have started hijacking DNS errors and show their own error pages instead (complete with annoying graphics and ads). Is there any way to fix this, or are they doing it on their ...
4
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1answer
1k views

Same Public IPs is possible?

As I understand two computers can't have the same public (external) IP address. Except for if those two computers are connected via the same router, then they can have (share) the same public IP ...
4
votes
2answers
6k views

Why am I not getting anywhere near 7Mbps download speeds?

Why am I not getting anywhere near 7Mbps download speeds? I'm paying for 7Mbps download speeds and yet the fastest I can get anything is around 360Kbps. It doesn't matter what time of day it is or who ...
4
votes
3answers
13k views

How to… Internet without ISP?

I know that servers are connected "directly to the internet", at least big servers like Google, right? So, how can I connect my computer to the internet without an ISP? Is it possible? Is it legal? ...
4
votes
3answers
8k views

How does an ISP assign IP?

I've noticed when I reconnect to internet, the last two bytes of IP address static IP changes. Does that mean when I disconnect someone else could have the same IP? How does this process differ from ...
4
votes
5answers
17k views

Tor Browser and how it affects torrents

I have recently received a message on my computer stating that my Internet Service Provider has been monitoring my traffic and have recorded me downloading several torrents that they have marked as ...
4
votes
3answers
782 views

ISP tricks DNS?

Running "nslookup google.com 8.8.8.8" yields IPs of my ISP (as Non-authoritative answer). I think this started occurring recently. Probably they are making some bullshit cache or something, as nearest ...
4
votes
3answers
32k views

Does Hotspot Shield hide my activity from my ISP?

Can Hotspot Shield make your activities invisible to your ISP? Or can they still see what you're downloading if they so choose? Here's the text from the product description: Hotspot Shield ...
4
votes
1answer
10k views

Throttled download speeds on new router with Comcast (ipv6 vs ipv4)

Issue with Comcast cable on Linksys or Cisco routers (and others) involving throttled download speed on ipv4. I recently upgraded my internet service to 100+ Mbs and also upgraded my router to ...
4
votes
2answers
589 views

How does a DSL modem know which ISP to connect to?

I am terminating my contract with my old ISP, however, because I've already paid my account till the end of the month, this connection is still active. I have also signed up with a new ISP who mailed ...
4
votes
3answers
3k views

How can I prove (with logging) where a port block is occurring?

How can I prove (with logging) where a port block is occurring? I've set up an FTP site on IIS (windows 7 home) and set up a rule in the Windows Firewall allowing access. The ftp site is accessible ...
4
votes
1answer
4k views

What information can my ISP see from my router?

I installed a new router today and saw my IP address change because the new router has a different MAC address and I am just curious on what information my ISP can see from my network. I know they ...
4
votes
1answer
18k views

Why do I keep getting redirected to “/cgi-bin/redirect.ha”, when using AT&T U-Verse?

When browsing the web, I occasionally get redirected to "/cgi-bin/redirect.ha". Closing the browser or flushing the cache seems to fix it sometimes, but not always. Sometimes I'll see from Google: ...
4
votes
1answer
2k views

How to check if your ISP does video throttling?

I’ve recently changed my ISP and noticed that I no longer can watch video sites like YouTube in real time; I need to wait for buffering first. On both ISPs, my speed was same 5 megabits per second. ...
3
votes
4answers
266 views

Is the SMTP of the ISP safe?

I am just curious, because I am using the SMTP of our ISP in my mailserver. Do you think it is safe to use, meaning can my ISP snoop in my emails? What do you think?
3
votes
6answers
9k views

Test wireless speed?

Is there an utility that can test the speed between my pc and the wireless access point i am connected to? To clarify why i need to know this. My isp is providing me with a speed of 20mbs. Now if my ...
3
votes
2answers
46k views

Why doesn't my tested internet speed match my actual?

Via speedtest.net, I have an download/upload speed around 30MB/1MB but when doing "strenuous" internet activities (torrents, uploading/downloading large files to webservers, etc), I get about ...
3
votes
3answers
7k views

When using a VPN, would my ISP still be able to read my internet traffic?

If I'm using a VPN service such as this, would my ISP still be able to read my internet traffic?
3
votes
3answers
3k views

Is a cable modem registered to a CMTS or the entire ISP?

I am curious if I were to move, do you have to tell your ISP, in this case my cable company, that I am moving? Is the cable modem MAC restricted to a certain CMTS, or could I use any CMTS belonging ...
3
votes
3answers
213 views

Problem with accessing certain sites

I know this probably sounds like a silly question, and it sort of is. But just bear with me for a moment. My girlfriend recently purchased an apartment in Downtown Budapest, and it came with a cable ...
3
votes
4answers
3k views

Can't SSH over Internet

In my home, I'm able to connect to my own computer via SSH when using my LAN IP. I can't connect using my public IP even when I disconnect the router and connect my computer directly to the modem. I ...
3
votes
2answers
451 views

Connect to a computer behind a router I do not control

My ISP has assigned a single IP address for my entire apartment building (the ISP has an exclusivity contract with the building). The 'WAN' address my router sees is '192.168.1.130' which tells me I ...
3
votes
4answers
96 views

TCP/IP on the transport level

I'm trying to understand what happens when I send a packet using a socket on the transport level. Do all packets which leave my computer go first to a geographical location designated by my ISP? Then ...
3
votes
3answers
1k views

How do I get to the bottom of network latency and bandwidth issues

I recently moved two blocks south. That move moved me from Comcast to Broadstripe (high-speed internet cable providers). Comcast was pretty good. Broadstripe sucks. I called them on the phone, and ...
3
votes
1answer
478 views

Very low SNR and very low line attenuation, what's up with my ADSL?

I have an ADSL connection, I live a couple hundred meters from the local telecommunications cabin. My router says that SNR is 4.8 dB, line attenuation is 9.5 dB and power is 9.8 dBm. From Google I ...
3
votes
1answer
637 views

I want uTorrent to use one ISP, and all other applications to use another ISP

I have a Windows 7 based desktop with two LAN cards (NICs): NIC1 is connected to a router, which connects to a reliable ISP with a low data cap (Fair Usage Policy). NIC2 is connected to an ADSL ...