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46803376d5
https://weakdh.org/imperfect-forward-secrecy-ccs15.pdf (released in 2015) recommends "to use primes of 2048 bits or larger", to which BSI's techical guideline BSI-TR-02102 (https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen/TechnischeRichtlinien/TR02102/BSI-TR-02102.pdf?__blob=publicationFile&v=5) concurs. The latter also recommends not to use DH groups comprising of less than 2000 bits after 2022, and shift to 3000 bit DH groups earlier as a precaution. According to RFC 3526, section 8, MODP-1536 provides an estimated security between 90 and 120 bits, a value that can be reasonably considered broken today, as it has been so for other types of cryptographic algorithms already, and per section 2.4 in the aforementioned paper, breaking 1024-bit DH is considered feasible for the NSA in 2015, which does not inspire confidence for MODP-1536 in 2022. Therefore, this patch suggests to mark MODP-1536 as broken, since it de facto is, and tag MODP-2048 as weak. The latter is also removed from the default selection, so newly created VPN connections won't use it anymore, to follow BSI's recommendations of using DH groups >= 3000 bits in 2022 and later. Signed-off-by: Peter Müller <peter.mueller@ipfire.org> Acked-by: Michael Tremer <michael.tremer@ipfire.org>
IPFire 2.x - The Open Source Firewall
What is IPFire?
IPFire is a hardened, versatile, state-of-the-art Open Source firewall based on Linux. Its ease of use, high performance in any scenario and extensibility make it usable for everyone. For a full list of features have a look here.
This repository contains the source code of IPFire 2.x which is used to build the whole distribution from scratch, since IPFire is not based on any other distribution.
Where can I get IPFire?
Just head over to https://www.ipfire.org/download
How do I use this software?
We have a long and detailed wiki located here which should answers most of your questions.
But I have some questions left. Where can I get support?
You can ask your question at our community located here. A complete list of our support channels can be found here.
How can I contribute?
We have another document for this. Please look here.