Maddy Mail Server implements all functionality required to run a e-mail server. It can send messages via SMTP (works as MTA), accept messages via SMTP (works as MX) and store messages while providing access to them via IMAP. In addition to that it implements auxiliary protocols that are mandatory to keep email reasonably secure (DKIM, SPF, DMARC, DANE, MTA-STS).
It replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC and more with one daemon with uniform configuration and minimal maintenance cost.
Full re-implementation in Go.
An inexpensive server and web hosting company. Virtual machines, dedicated servers, and colo services. Very inexpensive. Might be useful in a pinch to spin something up. Fully managed. Conventional and SSD storage. Multiple data centers around the world. Shared hosting plans have free daily backups. Multiple VPS tiers. Pay monthly or yearly to get a discount.
Wants to be the "cryptographic right answers" document, but for SSH.
Archived.
Maybe have Glitch monitor it?
/etc/ssh/sshd_config:
Protocol 2
AuthenticationMethods publickey
PasswordAuthentication no
PermitEmptyPasswords no
X11Forwarding no
AllowAgentForwarding no
# The problem with having "MaxAuthTries 2" is, the more keys your
# SSH agent has, the more chances you'll have to get locked out.
# I set it to <my number of SSH keys> +2.
MaxAuthTries 10
MaxSessions 10
HostbasedAuthentication no
IgnoreRhosts yes
PermitRootLogin no
KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,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,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.comA curated list of awesome stuff around the Matrix protocol, network, and ecosystem.
This guide arose out of the need for system administrators to have an updated, solid, well researched and thought-through guide for configuring SSL, PGP, SSH and other cryptographic tools in the post-Snowden age. Triggered by the NSA leaks in the summer of 2013, many system administrators and IT security officers saw the need to strengthen their encryption settings. This guide is specifically written for these system administrators.
The focus of this guide is merely to give current best practices for configuring complex cipher suites and related parameters in a copy & paste-able manner. The guide tries to stay as concise as is possible for such a complex topic as cryptography. Naturally, it can not be complete. There are many excellent guides (II & SYM, 2012) and best practice documents available when it comes to cryptography. However none of them focuses specifically on what an average system administrator needs for hardening his or her systems' crypto settings.
Awesome GIS is a collection of geospatial related sources, including cartographic tools, geoanalysis tools, developer tools, data, conference & communities, news, massive open online course, some amazing map sites, and more.
Has a nontrivial amount of Open Streetmap related resources that might be useful at some point.
A curated list of awesome Real Time Communications resources.
A curated list of awesome Mastodon and Fediverse related stuff!
A curated list of amazingly awesome XMPP server, clients, libraries, resources - with focus on security.
A curated list of delightful XMPP related resources.
This is a module for Prosody that allows federation to other XMPP servers running as Tor hidden services. If you just want to set up a hidden service, you don't really need this.
Heimdall Application Dashboard is a dashboard for all your web applications. It doesn't need to be limited to applications though, you can add links to anything you like. Some recognized applications can have their APIs accessed if you enter credentials. Recognizes other applications for the purpose of search and autocomplete. Written in PHP, uses SQLite as its datastore.
Affordable and reliable budget dedicated servers. Instant preconfigured dedicated servers available now!
Teaching the server tech you need for development and production. Eliminating the frustration of server configuration. Databases, configuration management, containers, proxies, security, PHP, and much more.
The Debian project's canonical list of groupware available for Debian.
hardware os solaris software servers unix sun java computer blog tools
A list of open proxy servers on the Net usable by anyone that connects to them. Updated often!
Has RSS feeds of everything it's found for automatic analysis.
Amazingly, this service is still around and still updated.
An online store that specializes in spare parts for and discount UNIX servers and high-end workstations. They have machines and parts for Sun equipment, Dell, HP, Rackables, and Supermicro. A lot of this gear used to be horribly expensive, so hobbyists and sysadmins on slim budgets often have to search long and hard for replacement components.
A utility written in python that scans for open top-level proxy servers. scanner Runs fairly exhaustive tests to find suitable servers. Don't run this from home! Lightweight dependencies.