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- openssh - What are these: sshd-session: banner exchange . . . invalid . . .
sshd-session[PID]: banner exchange: Connection from ip add res s port PORT: invalid format The IP-addresses are from all over the world, so, obviously, these aren't legitimate connections -- and I've updated my log-monitor to blacklist the offenders
- Can someone explain how sshd does privilege separation?
sshd 10072 0 2 0 0 71272 3016 ? S 10:56 0:00 \_ sshd: unknown [net] There you see the privileged process running under root privileges (10071) and net-child (sshd: user [net], running under sshd user, and usually under some sandbox which prevents most of the privilege escalation attacks, it there was a hole in the code
- OpenSSH AuthorizedPrincipalsFile Allows Any User
This is intended behavior Basically if you specify a static, unparameterized AuthorizedPrincipalFiles, then the same file is used for all users If you want user-based control, you have to use the %u thing What happens under the hood becomes clearer if you look at the AuthorizesPrincipalsCommand That one runs the specified command, passing the user as an argument Said command can be
- QID 38909 SHA1 deprecated setting for SSH (RHEL 8. 6)
The ssh -Q key command lists the key types that are supported by the SSH client The output from the usr bin sshd -tT command you posted lists the ciphers that are enabled on the SSH server So you need to go and re-read the OpenSSH documentation and understand what the different commands and configuration options actually do, and then work out which ones you need to set to solve your problem
- What could cause Bad packet length with sshd?
What could cause "Bad packet length" with sshd? Ask Question Asked 9 years, 6 months ago Modified 1 year, 10 months ago
- OpenSSH default preferred ciphers, hash, etc for SSH2
25 When using OpenSSH server (sshd) and client (ssh), what are all of the default program preferred ciphers, hash, etc (security related) and their default options (such as key length)? So, what are the defaults for symmetric key, MAC, key exchange, etc
- OpenSSH Disabling Diffie-Hellman (DHE) key exchange
I'm seeking to mitigate CVE-2002-20001 by disabling DHE key exchange through OpenSSH on an Ubuntu instance I understand this can be achieved through editing the etc ssh sshd_config at line
- Whats the importance of sshds setting RekeyLimit?
man sshd_config page states: RekeyLimit Specifies the maximum amount of data that may be transmitted before the session key is renegotiated, optionally followed a maximum amount of time that may
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