![]() ![]() ![]() Key Exchange: diffie-hellman-group14, diffie-hellman, diffie-hellman-group.This leaves the following algorithms, as named by the VShell application: By default, it enables all Cipher and MAC options (except for 'None') and all Key Exchange options except for 'Kerberos' and 'Kerberos (Group Exchange)'. I'm primarily working on a Windows stack, and we've been using VanDyke VShell as our SFTP server of choice for a number of years. in a TLS-based setup, they would also flag these algorithms in an SFTP server (were it included within their scope). ![]() However, I presume that, if a pen-tester flags RC4, 3DES, MD5, et al. disabling shell, exec and port-forwardingīut I must concede that I know very little about the crypto implementations, so the default settings have almost always been used.blacklisting repeated authentication failures.I always have tried to apply as good practice as I could determine on the SFTP servers, so we routinely use: However, another key component of some of our software is bulk-file upload/download via SFTP (i.e. Off the back of these test results, I have managed to at least get enough people interested in attaining the A-, A and A+ "grades" in the Qualys tests (management like quantifiable grades - who knew?!). The first step was pen-testing some of our core web applications, where the focus tends to be on weaknesses in the application code, but a lot has been said of the SSL/TLS suites and ciphers. At work we've been trying to move our external-facing services away from a policy of inclusivity (where we tried to accept as many people as possible) to a more security-focused setup. ![]()
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