similar to: [Bug 2333] New: forbid old Ciphers, KexAlgorithms and MACs by default

Hi, I am running the below servers on Red Hat Enterprise Linux release 8.7 (Ootpa). The details are as follows. # rpm -qa | grep openssh openssh-8.0p1-16.el8.x86_64 openssh-askpass-8.0p1-16.el8.x86_64 openssh-server-8.0p1-16.el8.x86_64 openssh-clients-8.0p1-16.el8.x86_64 # cat /etc/redhat-release Red Hat Enterprise Linux release 8.7 (Ootpa) # How do I enable strong KexAlgorithms, Ciphers and

Hi Kaushal, I maintain a set of SSH hardening guides for various platforms, including RHEL 8. You can find them here: https://ssh-audit.com/hardening_guides.html - Joe -- Joseph S. Testa II Founder & Principal Security Consultant Positron Security On Thu, 2024-01-25 at 18:39 +0530, Kaushal Shriyan wrote: > Hi, > > I am running the below servers on Red Hat Enterprise

On Fri, Jan 26, 2024 at 7:24?PM Jochen Bern <Jochen.Bern at binect.de> wrote: > On 25.01.24 14:09, Kaushal Shriyan wrote: > > I am running the below servers on Red Hat Enterprise Linux release 8.7 > > How do I enable strong KexAlgorithms, Ciphers and MACs > > On RHEL 8, you need to be aware that there are "crypto policies" > modifying sshd's behaviour,

Am 19.10.2016 um 00:58 schrieb Gordon Messmer <gordon.messmer at gmail.com>: > On 10/18/2016 03:28 PM, Clint Dilks wrote: >> So first >> question is are people generally modifying the list of ciphers supported by >> the ssh client and sshd? > > I suspect that "generally" people are not. I do, because I can, and so that I can offer at least some advice

On 10/18/2016 03:28 PM, Clint Dilks wrote: > So first > question is are people generally modifying the list of ciphers supported by > the ssh client and sshd? I suspect that "generally" people are not. I do, because I can, and so that I can offer at least some advice to people who aim to do so. > On CentOS 6 currently it looks like if I remove all the ciphers they are

https://bugzilla.mindrot.org/show_bug.cgi?id=3695 Bug ID: 3695 Summary: X11 forwarding via UNIX socket instead of 127.0.0.1 Product: Portable OpenSSH Version: 9.7p1 Hardware: Other OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: ssh Assignee:

Il giorno gio 22 nov 2018 alle ore 21:24 Stuart Henderson <stu at spacehopper.org> ha scritto: > > On 2018/11/22 19:55, owl700 at gmail.com wrote: > > Hi, I have compatibility issues with the latest version of > > openssh-server and an old dropbear client, the dopbear client stops at > > preauth > > > > ov 22 14:34:03 myhostname sshd[3905]: debug1: Client

BTW based on your output it looks like the DEFAULT policy is just fine, If you really want to turn etm HMAC and chacha20 off, you should follow the RHEL security alert https://access.redhat.com/security/cve/cve-2023-48795 cipher at SSH = -CHACHA20-POLY1305 ssh_etm = 0 by putting these lines into `/etc/crypto-policies/policies/modules/CVE-2023-48795.pmod`, applying the resulting subpolicy

Darren Tucker <dtucker at zip.com.au> writes: > On Tue, Nov 8, 2016 at 2:43 PM, Harry Putnam <reader at newsguy.com> wrote: >> Darren Tucker <dtucker at zip.com.au> writes: >> >>> On Tue, Nov 8, 2016 at 1:02 PM, Harry Putnam <reader at newsguy.com> wrote: >>> [...] >>>> gv harry> ssh -vv 2x >>>> >>>>

Hi all, this is a patch to make Ciphers, MACs and KexAlgorithms available in Match blocks. Now I can reach a -current machine with some Android terminal app without changing the default ciphers for all clients: Match Address 192.168.1.2 Ciphers aes128-cbc MACs hmac-sha1 KexAlgorithms diffie-hellman-group-exchange-sha1 Index: servconf.c

https://bugzilla.mindrot.org/show_bug.cgi?id=3779 Bug ID: 3779 Summary: SHA1 deprecation Product: Portable OpenSSH Version: 8.4p1 Hardware: Other OS: Linux Status: NEW Severity: trivial Priority: P5 Component: ssh Assignee: unassigned-bugs at mindrot.org Reporter:

https://bugzilla.mindrot.org/show_bug.cgi?id=3704 Bug ID: 3704 Summary: Implement an interface to capture port number of random remote port forwarding -R 0:localhost:22 Product: Portable OpenSSH Version: 9.7p1 Hardware: All OS: All Status: NEW Severity: enhancement Priority:

https://bugzilla.mindrot.org/show_bug.cgi?id=3814 Bug ID: 3814 Summary: incorrect signature when ssh'ing to an AIX server (Big Endian) from amd64 (Little endian) Product: Portable OpenSSH Version: 10.0p1 Hardware: PPC64 OS: AIX Status: NEW Severity: major Priority: P5

On 25.01.24 14:09, Kaushal Shriyan wrote: > I am running the below servers on Red Hat Enterprise Linux release 8.7 > How do I enable strong KexAlgorithms, Ciphers and MACs On RHEL 8, you need to be aware that there are "crypto policies" modifying sshd's behaviour, and it would likely be the *preferred* method to inject your intended config changes *there* (unless they

https://bugzilla.mindrot.org/show_bug.cgi?id=2332 Bug ID: 2332 Summary: Show more secure fingerprints than MD5 (e.g. SHA256) in ssh and ssh-keygen Product: Portable OpenSSH Version: 6.6p1 Hardware: Other OS: All Status: NEW Severity: enhancement Priority: P5

Trying to connect to a Dell iDRAC 6. The iDRAC reports it is running OpenSSH 5.2. From Fedora Linux 20 with OpenSSH 6.4p1, connections succeed. From Fedora Linux 23 with OpenSSH 7.2p2, connections succeed. From Fedora Linux 27 with OpenSSH 7.6p1, connections fail prior to prompting for a password. The message is, "Received disconnect from (IP address) port 22:11: Logged out." Trying

Oops, I meant to CC the list on this. -- Iain ----- Forwarded message from Iain Morgan <Iain.Morgan at nasa.gov> ----- Date: Thu, 17 Jan 2013 14:51:01 -0800 From: Iain Morgan <Iain.Morgan at nasa.gov> To: Damien Miller <djm at mindrot.org> Subject: Re: Inconsisten declaration of ssh_aes_ctr_iv() On Wed, Jan 16, 2013 at 21:26:39 -0600, Damien Miller wrote: > On Mon, 14 Jan

Thread split from my previous communication. Here is the key-commands logs on the platform. ***************** failed-regress.log ************ trace: AuthorizedKeysCommand with arguments FAIL: connect failed trace: AuthorizedKeysCommand without arguments FAIL: connect failed ***************** failed-ssh.log ************ trace: AuthorizedKeysCommand with arguments

https://bugzilla.mindrot.org/show_bug.cgi?id=3653 Bug ID: 3653 Summary: ConnectTimeout causes issue when connecting to an host via tsocks Product: Portable OpenSSH Version: 9.6p1 Hardware: Other OS: Linux Status: NEW Severity: normal Priority: P5 Component: ssh

And Server? - Ben Nick Stanoszek wrote: > Please see below :). Just a note---this is the EXACT command that I > use to log into the server BEFORE i try to update SSH. I continue to > use this same command for other servers. > > Nicks-MacBook-Pro:Downloads$ ssh -i WHATEVERKEY.pem > ubuntu at 54.200.249.185 <mailto:ubuntu at 54.200.249.185> -v -v -v -v > >