IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [isp]

Questions about the security of ISPs (Internet Service Providers), ISP managed devices, ISP communications etc.

ISP - Internet Service Provider - provides connectivity to the internet, managed services, logging, tracking, content delivery and load balancing.

134 questions
125
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7 answers

My ISP uses deep packet inspection; what can they observe?

I found out that my ISP does deep packet inspection. Can they see the contents of HTTPS connections? Wouldn't having HTTPS ensure that they can't see the contents being transferred? And can having a VPN protect me against deep packet inspection by…
cppanonhelp666
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70
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2 answers

How can ISPs handle DDoS attacks?

How can an ISP with low bandwidth like 50 Gbps handle a DDoS attack with more than this? I know there is a solution called "Black Hole". Is this enough to mitigate DDoS attacks or are there any other enterprise solutions? What kind of DDoS…
R1W
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60
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3 answers

Does your ISP know what type of phone/computer you're using?

For instance do they know whether you're using an iPhone or Samsung?
Alexander A
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52
votes
8 answers

If I delete my router's history can my ISP still provide it to my parents?

If I delete my router's history, is it still visible and can my ISP still provide it to my parents? Or is it deleted from existence?
madur
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35
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3 answers

Can ISPs replace a website's HTML/JavaScript/HTTP headers with something else?

It seems to me that "yes, they can". As I saw it in some countries, entering adult content will simply give a warning message that the site is blocked. Some places even block Facebook similarly. If yes, then technically, ISPs can steal a website's…
Phung D. An
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33
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7 answers

If I'm currently on a website and disable my VPN, is my ISP or the web server immediately aware of the change or does a page refresh have to occur?

For example: I'm browsing my favorite website with my favorite VPN enabled. I disable my VPN while I'm still on a page of the website. I haven't clicked any links yet, I haven't went back to the previous page, I'm just on the page, touching nothing.…
noobandproud
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30
votes
10 answers

Received email from ISP saying one of my devices has malware

My dad received a suspicious email from our ISP (mtnl.net.in). The email was from noreply@mtnl.net.in and it had our user ID (I masked it as xxxxxxxx@a) in the email so it must have come from the ISP itself. Email details below: Subject: "Intimation…
Nigel Fds
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17
votes
2 answers

Can my ISP see which VPN protocol I am using?

I know that my ISP can detect when I am using a VPN, but can it see which protocol I am using?
E. M.
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15
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3 answers

Can two locations in the same city at the same time have the same IP adress?

I got a notice due to vandalism in Wikipedia and the perpetrator is someone with the same IP as mine. I looked up the notice and it seems that the vandalism happened last year and the person behind it lives in the same city as me but in a different…
Anna
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14
votes
2 answers

Does Tor help us to prevent ISP tracking?

If Tor is able to hide the IP address of the machine and make us anonymous, then does it prevent the ISP from tracking us?
Sivaram Rasathurai
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14
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1 answer

What parties have access to the *full* requested URL of a website accessed via the HTTPS protocol?

What parties have access to the full requested URL of a website accessed via the HTTPS protocol? Here are some possibilities I can think of, and there could be more: local device accessing the website router modem local network provider (wired or…
RockPaperLz- Mask it or Casket
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10
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4 answers

My ISP shows my WiFi password on their public site in plain text. Should I be worried?

I recently noticed that when logged into my ISPs (Spectrum) public, external site that can be accessed outside my network, I can see my home network's WPA2 password in plain text. This clearly means they at least aren't hashing passwords. I have…
David says Reinstate Monica
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9
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2 answers

What does my ISP see if I change my DNS server?

I have an interesting question and I really want to get an answer to this. What does my ISP see if I change my DNS server and I use an HTTPS connection? Firstly, when I use my ISP's DNS server: So, I think, when I type a certain URL in my browser…
Danny
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8
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2 answers

how is my ISP able to inject into this webpage?

Lately I've noticed that pages I go to on http sometimes have a large banner at the top from my ISP. What's weird is when I refresh the pages I get the https version of the site and the banner is not there. I try to type the http version into the…
Terence Chow
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8
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2 answers

Is it dangerous to disable the IPv6 firewall built into many home routers?

The router that my ISP has delivered contains an IPv6 firewall. The only configuration option is whether it is on or off. Apparently, this firewall simply denies all incoming connections. I understand this is to prevent exposing all hosts and all…
boot4life
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