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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275
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33k 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 ...
175
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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 ...
51
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 ...
37
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
526 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 ...
13
votes
5answers
21k 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 ...
11
votes
5answers
18k 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 ...
9
votes
6answers
3k 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. ...
8
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4answers
16k views

How to affectively 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 ...
8
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6answers
4k 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 ...
8
votes
4answers
10k 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 ...
6
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3answers
1k 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
217 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
409 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
1k 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

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
25k 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 ...
4
votes
4answers
361 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
votes
2answers
5k 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
5answers
15k 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
5k 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
3answers
593 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
27k 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
3answers
3k 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?
4
votes
2answers
180 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 ...
4
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3answers
155 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 ...
4
votes
2answers
2k 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
3answers
4k 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
1answer
1k 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
216 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
7k 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
3answers
28k 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
203 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
3answers
1k 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
4answers
2k 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
4answers
89 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
805 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
468 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 ...
3
votes
2answers
2k views

Port 53 seems to be blocked by ISP - is there a way to override this?

My ISP seems to be blocking Port 53 if it is not connecting to one of its DNS servers. I was able to prove this through nslookup tests. Here are my tests: C:\Users\admin>nslookup google.com ...
3
votes
1answer
349 views

How does a modem know which ISP to connect to?

I am terminating my contraçt 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 ...
3
votes
1answer
612 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 ...
3
votes
3answers
1k views

My ISP locked me out of my router

I did a quick search for this and didn't find results, so I'm thinking its just as bizarre as I thought. MY internet went down last night, and after 20 minutes of unstable it was back. But out of ...
3
votes
1answer
863 views

How to circumvent ISP Limiting “Unknown” traffic - (SSH)Proxy, VPN

I am having issues with using a proxy/VPN, with my current ISP (Comenersol, Spain). From my point of view they limit traffic by protocol or by traffic they "know" and "dont know". I'll explain my ...
3
votes
1answer
864 views

Looking for VDSL2 modem that can work without NAT [closed]

All ADSL/VDSL providers here (The Netherlands) provide modems with integrated router. Not only that, but they put in their own firmware, so that you can do next to nothing with it. With my old ADSL ...
3
votes
1answer
171 views

A Canadian in Berlin - problems with FTP and IP numbers - anyone have ideas?

Thanks for taking the time. My problem- I am a Canadian (with Canadian laptop) presently in Berlin. For some reason I am having repeated connectivity problems -- At my flat I cannot connect via ...
2
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2answers
230 views

Do ISPs charge for network header bytes as part of data usage? [closed]

Network traffic includes a lot of extra bytes for network headers etc. etc. Does this get measured as part of data usage by ISPs?
2
votes
4answers
2k views

Spoof user agent for GoGo Inflight Internet?

Is it possible to trick the GoGo Inflight WiFi on airlines into thinking that you have a mobile device instead of a laptop? It seems like most airlines that offer in flight wireless these days use ...
2
votes
2answers
592 views

Can I have the same public IP while conected to different ISPs?

I have a possible disaster recovery scenario, use a production server with public IP from AT&T, the disaster recovery server should have the same public IP but with a different ISP (Time Warner or ...
2
votes
3answers
8k views

How do I determine the IP address of my ISP's nameservers? (/etc/resolv.conf only shows the default gateway)

My home server is connected to the router. This is the output of the /etc/resolv.conf file nameserver 192.168.1.1 How do I determine the IP address of my ISP's nameservers?