diff options
Diffstat (limited to 'etc/ssh')
| -rw-r--r-- | etc/ssh/ssh_config.d/my_ssh_config.conf | 2 | ||||
| -rw-r--r-- | etc/ssh/sshd_config | 151 |
2 files changed, 151 insertions, 2 deletions
diff --git a/etc/ssh/ssh_config.d/my_ssh_config.conf b/etc/ssh/ssh_config.d/my_ssh_config.conf deleted file mode 100644 index a5f1fca3..00000000 --- a/etc/ssh/ssh_config.d/my_ssh_config.conf +++ /dev/null @@ -1,2 +0,0 @@ -Host flylightning.xyz - Port ssh-isp diff --git a/etc/ssh/sshd_config b/etc/ssh/sshd_config new file mode 100644 index 00000000..bf7498f8 --- /dev/null +++ b/etc/ssh/sshd_config @@ -0,0 +1,151 @@ +# `man sshd_config` says "for each keyword, the first obtained value will be used". So I decided to put my configs before all others to override them all. +# Based on manpage, setting PasswordAuthentication no, and Arch Linux default KbdInteractiveAuthentication no, with other defaults seems already equivalent to AuthenticationMethods publickey, but I still put it here for redundancy. +# https://wiki.archlinux.org/title/OpenSSH#Force_public_key_authentication +AuthenticationMethods publickey +PermitRootLogin no +PasswordAuthentication no +# KbdInteractiveAuthentication no and UsePAM yes are Arch Linux default settings see /etc/ssh/sshd_config.d/00-archlinux.conf, I need these configs, I put them here just in case Arch Linux change the defaults in the future. +KbdInteractiveAuthentication no +UsePAM yes +# when ssh into this remote server, client if use alacritty need `SendEnv COLORTERM` to send the env to server, so server ls can default output color, more see comments in my alacritty.toml config +AcceptEnv COLORTERM + +# https://unix.stackexchange.com/a/472848 wrote about sshd_config AllowUsers +# CIDR address: "Notice that that will not work with 'inconsistent' addresses +# (where the bits outside the mask are not all 0, eg. 192.168.177.0/22)". My +# understanding is that 177 in binary is 10110001, 32-22=10 so 192.168.177.0 +# last 10 binary are 0100000000, note there's a 1 so it will not work; and +# 192.168.176.0/22 works because its last 10 binary are all 0. `man +# sshd_config` also wrote about this: "Note that the mask length provided must +# be consistent with the address - it is an error to specify a mask length that +# is too long for the address or one with bits set in this host portion of the +# address. For example, 192.0.2.0/33 and 192.0.2.0/8, respectively."; the +# second part of the comment "one with bits set in this host portion of the +# address" with the example CIDR ip 192.0.2.0/8 matched my understanding above, +# 192.0.2.0/8 has a 2 which is 10 in binary which is a bit set "in" the CIDR /8 +# range, so it will not work. Just before that quote, it also gives an example +# of 192.0.2.0/24 which should work. Not tested. +# +# My test shows `AllowUsers gitolite@localhost` does not work, so I use +# 127.0.0.1 and ::1 +AllowUsers gitolite@10.0.0.0/24 gitolite@127.0.0.1 gitolite@::1 + +# Include drop-in configurations +Include /etc/ssh/sshd_config.d/*.conf + +# This is the sshd server system-wide configuration file. See +# sshd_config(5) for more information. + +# This sshd was compiled with PATH=/usr/local/sbin:/usr/local/bin:/usr/bin + +# The strategy used for options in the default sshd_config shipped with +# OpenSSH is to specify options with their default value where +# possible, but leave them commented. Uncommented options override the +# default value. + +#Port 22 +#AddressFamily any +#ListenAddress 0.0.0.0 +#ListenAddress :: + +#HostKey /etc/ssh/ssh_host_rsa_key +#HostKey /etc/ssh/ssh_host_ecdsa_key +#HostKey /etc/ssh/ssh_host_ed25519_key + +# Ciphers and keying +#RekeyLimit default none + +# Logging +#SyslogFacility AUTH +#LogLevel INFO + +# Authentication: + +#LoginGraceTime 2m +#PermitRootLogin prohibit-password +#StrictModes yes +#MaxAuthTries 6 +#MaxSessions 10 + +#PubkeyAuthentication yes + +# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2 +# but this is overridden so installations will only check .ssh/authorized_keys +AuthorizedKeysFile .ssh/authorized_keys + +#AuthorizedPrincipalsFile none + +#AuthorizedKeysCommand none +#AuthorizedKeysCommandUser nobody + +# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts +#HostbasedAuthentication no +# Change to yes if you don't trust ~/.ssh/known_hosts for +# HostbasedAuthentication +#IgnoreUserKnownHosts no +# Don't read the user's ~/.rhosts and ~/.shosts files +#IgnoreRhosts yes + +# To disable tunneled clear text passwords, change to "no" here! +#PasswordAuthentication yes +#PermitEmptyPasswords no + +# Change to "no" to disable keyboard-interactive authentication. Depending on +# the system's configuration, this may involve passwords, challenge-response, +# one-time passwords or some combination of these and other methods. +#KbdInteractiveAuthentication yes + +# Kerberos options +#KerberosAuthentication no +#KerberosOrLocalPasswd yes +#KerberosTicketCleanup yes +#KerberosGetAFSToken no + +# GSSAPI options +#GSSAPIAuthentication no +#GSSAPICleanupCredentials yes + +# Set this to 'yes' to enable PAM authentication, account processing, +# and session processing. If this is enabled, PAM authentication will +# be allowed through the KbdInteractiveAuthentication and +# PasswordAuthentication. Depending on your PAM configuration, +# PAM authentication via KbdInteractiveAuthentication may bypass +# the setting of "PermitRootLogin prohibit-password". +# If you just want the PAM account and session checks to run without +# PAM authentication, then enable this but set PasswordAuthentication +# and KbdInteractiveAuthentication to 'no'. +#UsePAM no + +#AllowAgentForwarding yes +#AllowTcpForwarding yes +#GatewayPorts no +#X11Forwarding no +#X11DisplayOffset 10 +#X11UseLocalhost yes +#PermitTTY yes +#PrintMotd yes +#PrintLastLog yes +#TCPKeepAlive yes +#PermitUserEnvironment no +#Compression delayed +#ClientAliveInterval 0 +#ClientAliveCountMax 3 +#UseDNS no +#PidFile /run/sshd.pid +#MaxStartups 10:30:100 +#PermitTunnel no +#ChrootDirectory none +#VersionAddendum none + +# no default banner path +#Banner none + +# override default of no subsystems +Subsystem sftp /usr/lib/ssh/sftp-server + +# Example of overriding settings on a per-user basis +#Match User anoncvs +# X11Forwarding no +# AllowTcpForwarding no +# PermitTTY no +# ForceCommand cvs server |