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Questions tagged [filtering]

The tag has no usage guidance.

1
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2answers
87 views

How can I use Message-ID in header to screen (filter) Emails?

Recently started receiving torrent of spam emails immediately after ISP (Charter-Spectrum) switched to an upgraded Email system. Five of my ISP email addresses getting the same spam every day. Some ...
-1
votes
1answer
242 views

Does an employer see if you try to access a blocked site? [duplicate]

Today while browsing on my mobile phone connected to my employer's wifi, I clicked on the link to a tumblr page. I then got an error message saying the web filter had blocked the page deeming it ...
0
votes
2answers
4k views

XSS with URL encoding

If a website URL gets encoded then is the website still vulnerable to XSS or no? For example, if I try <script>alert(1)</script> and the site URL encodes my payload to %3Cscript%3Ealert(1)...
1
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0answers
45 views

Odd rails filter allows <script> tag but not <% %>

I am on a pentest for a client and they have a custom rails app that allows admin accounts to change page contents. While the front end editor filters script tags the backend does not, so using Burp I ...
-2
votes
1answer
516 views

Bypass Censorship and Filtering Using Blockchain Technology [closed]

I heard some people and companies (like Telegram) claiming it's possible to bypass censorship & filtering of internet using Blockchain technology, for example to prevent censorship of a certain ...
1
vote
3answers
92 views

Why isn't email filtered when using contact form

When I send a non-gmail email to someone (company email) for the first time, there's a chance it will get filtered into the ether, never to be heard from again. However, if I use their website's ...
1
vote
1answer
48 views

Port filtering for Ubuntu-Nginx minimal server environment

I've established a minimal, uncustomized LEMP stack (Ubuntu 16.04). The only server I have besides Nginx is Postfix. To protect that environment I filtered all ports besides a few, this way: ufw ...
3
votes
2answers
94 views

Remove domain from web filter blacklists

A domain with a checkered past I work at a company that purchased a .com domain around a year ago, and it uses this domain for its web site and e-mail now. However, the previous owner had a site (...
3
votes
1answer
1k views

How does CleanBrowsing DNS servers make 'Youtube, Google and Bing forced to SafeMode'?

Quote from Activating CleanBrowsing Activating CleanBrowsing is pretty simple and only takes 5 minutes. We do our work via DNS, so you have to switch your DNS servers to go through our Network ...
1
vote
0answers
744 views

How do I bypass TCP and UDP filters (all ports for TCP and UDP are blocked) [closed]

I really want to play online games that use TCP/UDP, but the protocol is blocked. I can't use any VPN. I can use Tor and Psiphon, but they don't tunnel TCP and UDP (unless I use VPN mode but that ...
0
votes
1answer
225 views

What ports should I filter on a default Magento installation

I have recently installed a Magento on Ubuntu 14.04 on Digital Ocean and I'm wondering what ports should I filter to keep it safe. Well, actually the question should be: what ports I keep open to the ...
1
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3answers
557 views

Is this filter safe enough to mitigate XSS?

I have an application that escapes the following special characters. & < > " ' The application heavily displays HTTP request parameters throughout the application. The request parameters ...
3
votes
2answers
2k views

MAC filtering the internet traffic?

I was trying to build a firewall where in the access to my LAN from internet should be allowed only if it matches the predefined MAC address of the device i.e,. MAC filtering, but later i found out ...
3
votes
2answers
214 views

how does iran blocks domains in tls connection but not based on ip

recently (last week?) internet in iran has started blocking https websites again. they did this before but that was, as far as I know, ip based. but it seems that the new blockage in not ip based but ...
1
vote
1answer
118 views

Can any web proxies differentiate between JScript and Javascript files?

Its a relatively common best practice to filter executables and scripts from a standard user at the proxy/gateway level in corporate environment. While EXE/BAT/CMD files are easy enough, and arguably ....