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by flumpcakes 1348 days ago
Firewalls from security vendors with L7 decryption (using MITM root certificates from a company-wide PKI) is pretty standard in any business that needs to care about "cyber security".

I always hear people cry and moan about this but having worked on that side of the fence I would like you to know that I know of instances where people have been downloading illegal material (involving children) and running tor. That's not to mention the 75% of staff who willing give details during phishing campaigns.

Saying that, I find 60%+ of cyber businesses to be a waste of time at best, and at worse just frauds. Core firewalls with L7 capabilities from vendors such as Palo Alto and CheckPoint are legitimate security devices, especially suited for enterprise networks.

I do think it's pretty pointless running those in the cloud though, unless you have admin VMs on vnets for your production resources. But that way lies madness anyway.

2 comments

The problem with those is that they are often poorly configured.

Take for example the scenario in question here. Is it really legitimate to allow GET requests to a domain but block all POST requests? That sounds questionable at best. How many sites is it safe to view pages, download files, etc from, but POSTing to them is dangerous? There may be a few, but it is not particularly common. Far more common is sites where any request could be harmful. (Malware, sites spoofing other sites, etc).

I get fully blocking a domain. That can be reasonable sensible, especially for domains in a known blocklist of porn, malware, etc.

I can get inspecting content and blocking if there is clear evidence of maliciousness (but this must be done carefully, since false positives can cause a lot of headache!), but for other content-matching scenarios, you may well be better off generating an alert to be reviewed manually, rather than blocking things.

There have been cases where these system incorrectly block business critical functionality, causing a company to completely shut down, losing huge sums of money while figuring out what is breaking things, before getting it sorted.

The correct solution to phishing is to stop users from receiving phishing email in the first place.

Yes, blocking phishing mails can be impossible with some hosted providers' spam filtering. But, here the solution should be to push back on e.g., Microsoft to fix their dumpster fire spam filtering, or switch the organization to a different product that works.

I don't think IT should be pretending at being police. It isn't their job. And, any infrastructure that can be used to catch "criminals" can be used to abuse employees.

Also, there is absolutely nothing wrong with using tor. I've used it often, at work, to test things as if from off-site.

I believe the role of IT is to respectfully facilitate users to safely get their work done. This involves a balance of security measures that do not invade the users' privacy, pushing back against management when appropriate to protect the users from managerial overreach, and sometimes just allowing something that could be dangerous because the alternative is worse e.g., MiM provides limited protection from exfiltration, but also enables horrible abuse by management and should be pushed back against.