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Vulnerabilities exploited in VPN products used worldwide

ncsc.gov.uk

111–120 of 140 posts

Re: Vulnerabilities exploited in VPN products used worldwide

#111
post #100

Earlier quoted context omitted.

How is a local network different from the internet, presuming there is no firewall or nat between the client and the server ?

On a local network, you make the assumption that there are only authorized users.

Uh oh, that assumption is a big no no.

Re: Vulnerabilities exploited in VPN products used worldwide

#112
post #72

Earlier quoted context omitted.

> WireGuard .. is practically bulletproof in terms of keeping connections alive Try switching between IPv4 and IPv6 networks, or reaching a peer on non-default/primary network on Windows. Not denying it would usually have better connectivity than TCP based ssh.

Where do you encounter IPv6 in the wild?

I've come across it on Wifi hotspots as well for some reason, it felt like the were deployed by a telecom company (cellular being most common way for non tech people to use IPv6 on my sites).

Re: Vulnerabilities exploited in VPN products used worldwide

#113

Earlier quoted context omitted.

I could be wrong, but it’s superseded by FIPS140-3. Anyway, compliance doesn’t necessarily imply security.

Unless you are purposely trying to pedantic, one should know that FIPS140-3 just came out. You can't even search the Cryptographic Module Validation Program (CMVP) tool for FIPS140-3 standard level yet. FIPS140-2 for all practical purposes is the current standard to measure against. And if you really are negating FIPS140-X and what it means to large organizations and government entities... you should do some reading…

That post yesterday : https://news.ycombinator.com/item?id=21147865 shows a side channel attack on smartcards. In the links we can see the FIPS140-compliant affected hardwares. Maybe it contributes to show that FIPS140-02 is not as much a reference than it used to be?

Re: Vulnerabilities exploited in VPN products used worldwide

#114
post #50

Earlier quoted context omitted.

Problem #1: they are closed source. Good luck verifying their security. Problem #2: it is in the best interest of nation states to be able to break the VPNs and it's in the best interest of large vendors to quietly cooperate with the government.

If you are worried about your secrets being revealed to a nation state, then chances are you shouldn’t be putting any of them over the public internet - VPN or not.

There is a large amounts of secrets that fall between the two extremes 'not very secret at all' and 'should never be spoken of or touch a digital device'.

Corporate espionage backed by nation state actors is a real thing, and there is nothing wrong with wanting to secure yourself against it while running a normal business.

Re: Vulnerabilities exploited in VPN products used worldwide

#115
post #104
post #70

Earlier quoted context omitted.

Yes. WireGuard is cryptographically superior to SSH, attaches at a network layer without fussy interactions with a Unix shell (that then also needs to be accounted for in a security model), has higher performance, is practically bulletproof in terms of keeping connections alive, and gets you direct access to whatever resources you've provisioned the network to provide. I wouldn't ding someone using SSH tunnels (caref…

Wireguard does not have better performance or is faster verses Openvpn in any independent Benchmark released up to now.

Yeah, but nobody cares. OpenVPN is horribly slow and wireguard isn't, there's no point in comparing these two.

You wouldn't have an independent benchmark comparing a GTR and a semi truck.

Re: Vulnerabilities exploited in VPN products used worldwide

#116
post #104
post #70

Earlier quoted context omitted.

Yes. WireGuard is cryptographically superior to SSH, attaches at a network layer without fussy interactions with a Unix shell (that then also needs to be accounted for in a security model), has higher performance, is practically bulletproof in terms of keeping connections alive, and gets you direct access to whatever resources you've provisioned the network to provide. I wouldn't ding someone using SSH tunnels (caref…

Wireguard does not have better performance or is faster verses Openvpn in any independent Benchmark released up to now.

Sure there are, many threads about wireguard include performance comparisons to openvpn. Most home routers that can install both see a significant increase (I saw about 3-4x if I remember correctly).

Also see the endless discussions on how to deliver 100 Mbit/s for single connections on OpenVPN. It is absolutely insane, you have to spend many hundreds of dollars on hardware to have a fighting chance. And even if you get hardware acceleration that doesn't help nearly as much as you'd expect. And aside from cost the power consumption required for such hardware is very prohibitive for most.

Meanwhile my phone (first gen. Pixel (so three generations behind)), over wifi, gets at least 60 mbit/s over wireguard to a weak home router and then out to internet.

Re: Vulnerabilities exploited in VPN products used worldwide

#117
post #109
post #39

Earlier quoted context omitted.

> The gold standard, as ever, is Wireguard. Not disagreeing with you about the state of commercial VPN products, but regarding WG specifically. Something I don't see in the other replies just yet is that Wireguard doesn't yet have an ecosystem around it, but is designed for that in a good way. By which I mean, it follows the Unix philosophy of focusing on one specific task and doing it very well, and it has succeeded…

Last I checked it did not have a a Windows client, so I'm still using OpenVPN. CLI clients are of course next to useless for Windows users. I would really like to use WG instead.

It does now, and it has a much better UX than OpenVPN.

Re: Vulnerabilities exploited in VPN products used worldwide

#119
post #109
post #39

Earlier quoted context omitted.

> The gold standard, as ever, is Wireguard. Not disagreeing with you about the state of commercial VPN products, but regarding WG specifically. Something I don't see in the other replies just yet is that Wireguard doesn't yet have an ecosystem around it, but is designed for that in a good way. By which I mean, it follows the Unix philosophy of focusing on one specific task and doing it very well, and it has succeeded…

Last I checked it did not have a a Windows client, so I'm still using OpenVPN. CLI clients are of course next to useless for Windows users. I would really like to use WG instead.

Tunsafe is there since quite a while.

Some client from WG directly is also in the works.

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