OpenSSH: www.openssh.org

OpenSSH 邮件列表: openssh.org/list.html

Debian 邮件列表: www.debian.org/MailingLists/subscribe

Red Hat/Fedora 邮件列表: www.redhat.com/mailman/listinfo

SUSE 邮件列表: www.suse.com/us/private/support/online_help/mailinglists/index.html

SecurityFocus SSH 邮件列表: www.securityfocus.com/archive/121

John The Ripper: www.openwall.com/john

Nessus 漏洞扫描器: www.nessus.org