An open-source image to PDF converter built with web technology

Generate the hash:
(make sure you have only one line/type, so either delete all others in key.pub or run ssh-keyscan -t rsa example.org > key.pub)

• ssh-keygen -l -f key.pub (default hash, depending on OpenSSH version)
• ssh-keygen -l -f key.pub -E md5 (md5 on current OpenSSH)
• awk '{print $2}' ssh_host_rsa_key.pub | base64 -d | sha256sum -b | awk '{print $1}' | xxd -r -p | base64 (sha256 on old OpenSSH)

(You might need to start the line with awk '{print $3}' for newer versions of ssh-keyscan because the format changed)

Good combo (2017-10-12):

Ciphers

KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-ripemd160-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,umac-128@openssh.com

LogLevel VERBOSE logs user's key fingerprint on login. Needed to have a clear audit track of which key was using to log in.

LogLevel VERBOSE

Log sftp level file access (read/write/etc.) that would not be easily logged otherwise.

Subsystem sftp /usr/lib/openssh/sftp-server -f AUTHPRIV -l info

Use kernel sandbox mechanisms where possible in unprivileged processes

Systrace on OpenBSD, Seccomp on Linux, seatbelt on MacOSX/Darwin, rlimit elsewhere.

UsePrivilegeSeparation sandbox

AllowUsers pi

SSH server auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc)

A simple CSV editor for the Mac

SOCKS servers are a form of proxy that are commonly used in firewalled LAN environments to allow access between networks, and often to the Internet. The problem is that most applications don't know how to gain access through SOCKS servers. This means that network based applications that don't understand SOCKS are very limited in networks they can reach. An example of this is simple 'telnet'. If you're on a network firewalled from the internet with a SOCKS server for outside access, telnet can't use this server and thus can't telnet out to the Internet.

Monitor the condition of your battery and get important information about it in one place.