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by flumpcakes
1348 days ago
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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. |
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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.