Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
---
config/ssh/ssh_config | 27 +++++++++++++--------------
1 file changed, 13 insertions(+), 14 deletions(-)
diff --git a/config/ssh/ssh_config b/config/ssh/ssh_config
index 2abfae6d1..2e2ee60c3 100644
--- a/config/ssh/ssh_config
+++ b/config/ssh/ssh_config
@@ -1,33 +1,32 @@
-# OpenSSH client configuration
+# OpenSSH client configuration file for IPFire
#
-# set some basic hardening options for all connections
+# The full documentation is available at: https://man.openbsd.org/ssh_config
+#
+
+# Set some basic hardening options for all connections
Host *
- # disable Roaming as it is known to be vulnerable
+ # Disable Roaming as it is known to be vulnerable
UseRoaming no
- # only use secure crypto algorithm
+ # Only use secure crypto algorithms
KexAlgorithms curve25519-sha256(a)libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305(a)openssh.com,aes256-gcm(a)openssh.com,aes128-gcm(a)openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm(a)openssh.com,hmac-sha2-256-etm(a)openssh.com,umac-128-etm(a)openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128(a)openssh.com
- # always visualise server host keys (has no technical
- # effect, but helps to identify key based MITM attacks)
+ # Always visualise server host keys (but helps to identify key based MITM attacks)
VisualHostKey yes
- # use SSHFP (might work on some up-to-date networks) to look up host keys
+ # Use SSHFP (might work on some up-to-date networks) to look up host keys
VerifyHostKeyDNS yes
# send keep-alive messages to connected server to avoid broken connections
ServerAliveInterval 10
ServerAliveCountMax 6
- # disable X11 forwarding (security risk)
- ForwardX11 no
-
- # always check server IP address
- CheckHostIP yes
-
- # ensure only allowed authentication methods are used
+ # Ensure only allowed authentication methods are used
PreferredAuthentications publickey,keyboard-interactive,password
+ # Prevent information leak by hashing ~/.ssh/known_hosts
+ HashKnownHosts yes
+
# EOF
--
2.16.4