fully_encrypted_debian

anonymous@undisclosed.example.com (Anonymous) — Sat, 23 Sep 2017 22:25:30 +0000

Full disk encryption with LUKS (inklusive /boot) Referenzen: * * * * * *

dnssec

anonymous@undisclosed.example.com (Anonymous) — Tue, 16 Apr 2024 03:00:36 +0000

DNSsec mit Bind9 Standards für die „Domain Name System Security Extensions (DNSSEC)“: RFC 4033, RFC 4034, RFC 4035, RFC 5011 und RFC 5155. Entropie zur Schlüsselgenerierung Um genügend Entropie für die Erzeugung der Schlüssel zur Verfügung zu haben, sollte z.B.

hardware

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:46:57 +0000

2014-06-17 zuerst „Debian OS-Basis-Installation auf Blech“ durchfuehren!!! zusaetzlich „auf dem Blech“: ### Proxy der UKBW fuer die Installations-Shellsitzung setzen: export http_proxy="http://proxy01.ukbw.de:3128/" ### LiHAS GPG-Key importieren:

sign

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:53:39 +0000

Domain Key Identified Mail outbound - ORIGINATING - signieren DKIM basiert auf asymetrischer Verschlüsselung mit public- und private-Key. Das Key-Paar wird mit folgender Syntax erzeugt: amavisd genrsa [Anzahl der Bits für den Schlüssel]

openssl_ca

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:44 +0000

simple OpenSSL Certficate Authority Create Certificate Authority station7:/etc # station7:/usr/share/ssl/misc # ./CA.sh -newca CA certificate filename (or enter to create) Making CA certificate ... Generating a 1024 bit RSA private key .....++++++ .....................................++++++ writing new private key to './demoCA/private/./cakey.pem' Enter PEM pass phrase: Verifying - Enter PEM pass phrase: ----- You are about to be asked to enter information that will be incorporated into your c…

all

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:46:38 +0000

2014-08-08 zuerst „Debian OS-Basis-Installation auf Blech“ durchfuehren!!! auf allen Server-Instanzen („Blech“, Linux VServer, LXC): ### Proxy der UKBW fuer die Installations-Shellsitzung setzen: export http_proxy=„“ ### LiHAS GPG-Key importieren: wget -O -

ldap_secure

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:43 +0000

TLS and LDAP over SSL (ldaps) Modifying /etc/openldap/ldap.conf Modify / append the TLS-settings: #--- SSL/TLS setting ---# TLSCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP TLS_CACERT /etc/ssl/certs/ca_cert.pem TLS_CERT /etc/ssl/certs/station7_cert.pem TLS_KEY /etc/ssl/private/station7_key.pem TLS_REQCERT demand

config

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:41 +0000

Apache SSL (https) A special thing for getting Apache2 starting withaut user-interaction is also to store a decrypted key, since without Apache will ask at every start for the password... mv /etc/ssl/private/station7_key.pem /etc/ssl/apache2/private/station7_secure-key.pem openssl rsa -in /etc/ssl/private/station7_secure-key.pem -out /etc/ssl/apache2/private/station7_decrypted-key.pem

cyrus_secure

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:52:44 +0000

TLS, IMAP over SSL (imaps) and pop3 over SSL (pop3s) TLS Modify / append the TLS-settings in /etc/imap.conf: #--- SSL/TLS setting ---# tls_ca_path: /etc/ssl/certs tls_ca_file: /etc/ssl/certs/ca_cert.pem tls_cert_file: /etc/ssl/certs/station7_cert.pem tls_key_file: /etc/ssl/private/station7_key.pem

neues_certificate

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:48:23 +0000

Neues Zertifikat für ejabberd installieren neues PEM-File erzeugen: * in CA Certificate und private-Key erzeugen und nach /etc/ejabberd auf jabber-Server kopieren * auf ejabberd-Server in cat jabber@ukbw.de-key.pem > ejabberd.pem cat jabber@ukbw.de-cert.pem >> ejabberd.pem

tipps

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 15:00:16 +0000

SSH Tipps SSH-Key auf entferntem Server einspielen ssh-copy-id root@HOSTNAME root@HOSTNAME's password: Now try logging into the machine, with "ssh 'root@HOSTNAME'", and check in: ~/.ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting.

pam

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:43 +0000

/etc/ldap.conf (for PAM) # # This is the configuration file for the LDAP nameservice # switch library, the LDAP PAM module and the shadow package. # # Your LDAP server. Must be resolvable without using LDAP. host 127.0.0.1 # The distinguished name of the search base. base dc=example,dc=com # The LDAP version to use (defaults to 3 # if supported by client library) ldap_version 3 # Hash password locally; required for University of # Michigan LDAP server, and works with Netscape # Directory Ser…

monitoring

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:58:04 +0000

Monitoring email-monitoring * create „/var/lib/rrd“ Mailgraph mailgraph is a very simple mail statistics RRDtool frontend for Postfix that produces daily, weekly, monthly and yearly graphs of received/sent and bounced/rejected mail (SMTP traffic).

postfix_secure

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:56:23 +0000

Postfix with TLS and SSL (smtps) Use a portscanner like „nmap“: station7:/etc/init.d # nmap localhost | grep smtp 25/tcp open smtp -> smtp is only running at port 25! TLS Modify the TLS-settings in /etc/postfix/main.cf #--- SSL/TLS setting ---# smtpd_client_restrictions= permit_tls_clientcerts, permit_sasl_authenticated smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, permit_tls_clientcerts, reject_unauth_destination, check_sender_access hash:/etc/…

avast-ssl

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:44 +0000

Thunderbird - SpamPal - Avast with SSL 1. Installing and preparing STUNNEL: Download OPENSSL for Windows from: Download STUNNEL for WIndows from: and install both. In the folder where you have installed stunnel (e.g. C:\Programme\stunnel), you will create its configuration file.

ca

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:44 +0000

Certificate Authority generate certificate and key-files using e.g. one of the follwing * simple OpenSSL CA * Tiny CA * phpki CA trusting your Certificate Authority Ensure there's only one CA certificate in the file from your CA. Normally there is, but ocassionally several are stored in the same file. To list the number of certificates in a file, use the command below. If you get an answer of more than one, then see the section on multiple certificates in one file. The command to ch…

ldap_conf

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:43 +0000

/etc/openldap/ldap.conf # # LDAP Defaults # # See ldap.conf(5) for details # This file should be world readable but not world writable. # 21.07.2006, chhaas BASE dc=example,dc=com URI ldap://127.0.0.1 ### #SIZELIMIT 12 #TIMELIMIT 15 #DEREF never #--- SSL/TLS setting ---# TLSCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+SSLv2:+EXP #TLSCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP TLS_CACERT /etc/ssl/certs/ca_cert.pem TLS_CERT /etc/ssl/certs/station7_cert.pem TLS_KEY /e…

ldap

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:55:50 +0000

using LDAP /etc/postfix/ldap-aliases.cf: server_host= ldaps://localhost:636 server_port= 636 start_tls = no tls_ca_cert_file = /etc/ssl/postfix/certs/ca_cert.pem tls_ca_cert_dir = /etc/ssl/postfix/certs/ tls_cert = /etc/ssl/postfix/certs/station7_cert.pem tls_key = /etc/ssl/postfix/private/station7_key.pem #tls_random_file = dev:/dev/urandom tls_cipher_suite = ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP version= 3 bind= no timeout= 120 search_base= dc=example,dc=com query_filter = (&(object…

todo

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:42 +0000

ToDo Things, that have to be documented: * generating the decrypted SSL-key with OpenSSL-CA * use of TinyCA and phpki-CA * Postfix: main.cf and master.cf * implement in email -> Postfix -> SMTPd- / SMTP-Authentication

email

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 16:26:57 +0000

email Mailserver, Mailgateway, Anti-Spam [AMaVISd-new, SpamAssassin, dSpam, rspamd], SPF, DKIM, PFS etc. \\}} Postfix smtpd Postfix ist ein sehr mächtiger Mail Transport Agent, entwickelt von Wietse Venema. * Postfix Konfiguration für einen Mailserver * use of LDAP lookup maps * Postfix' Postscreen Modul anstatt policyd-weight oder postfwd * Postfix Anti-SPAM/UCE settings * Postfix SASL Konfiguraton * SMTP-authentication * TLS and SSL configuration (smtps) *

slapd_conf

anonymous@undisclosed.example.com (Anonymous) — Mon, 27 Dec 2010 16:20:43 +0000

/etc/openldap/slapd.conf # The database configuration parameters must appear *after* the "database" # directive, as DB_CONFIG files are 'per backend'. dbconfig set_cachesize 4 0 1 dbconfig set_lg_regionmax 262144 dbconfig set_lg_bsize 2097152 dbconfig set_lg_dir /var/log # Automatically remove log files that are no longer needed. dbconfig set_flags DB_LOG_AUTOREMOVE # # Setting set_tas_spins reduces resour…

amavisd

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:57:55 +0000

AmaVisd-new /etc/amavis/amavisd.conf: use strict; # a minimalistic configuration file for amavisd-new with all necessary settings # # see amavisd.conf-default for a list of all variables with their defaults; # see amavisd.conf-sample for a traditional-style commented file; # for more details see documentation in INSTALL, README_FILES/* # and at http://www.ijs.si/software/amavisd/amavisd-new-docs.html # COMMONLY ADJUSTED SETTINGS: # @bypass_virus_checks_maps = (1); # uncomment to DI…

dkim

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 15:49:02 +0000

Postfix mit Domain Key Identifified Mail (DKIM) Vorausssetzung für DKIM ist ein installiertes -> AMaVIS. Auch bei DKIM wird, wie bei allen anderen Signaturen, in zwei Richtngen unterschieden: * eingehende emails (inbound): Überprüfung von DKIM-Signaturen in emails

sieve

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:52:56 +0000

Sieve * * * * Sieve and SSL / TLS timsieved allows for SSL on connect (like https, imaps, or pop3s), only STARTTLS. So you have to wrap it in an stunnel (www.stunnel.org), which is a another story ... Have a look at this: Testi…

config

anonymous@undisclosed.example.com (Anonymous) — Sat, 06 Apr 2024 16:56:19 +0000

Postfix smtpd (smtp + daemon) = server = Postfix receives mail from a client smtp = client = Postfix sends mail to another mailserver Edit /etc/postfix/main.cf queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix smtpd_banner = mail.example.org myhostname = mail.example.org myorigin = example.org mydestination = mail.example.org mynetworks = 127.0.0.0/8, 10.0.0.0/8 alias_maps = hash:/etc/aliases, ldap:virtualaliases…

verify

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:53:51 +0000

Domain Key Identified Mail inbound verifizieren vim /etc/amavis/conf.d/50-user # DKIM-Ueberpruefung: $enable_dkim_verification = 1; $allowed_added_header_fields{lc('Authentication-Results')} = 1; service amavis restart AMaViS kann nun mit Hilfe des Public-Keys der in der

hackerbruecke.net

fully_encrypted_debian

dnssec

hardware

sign

openssl_ca

all

ldap_secure

config

cyrus_secure

neues_certificate

tipps

pam

monitoring

postfix_secure

avast-ssl

ca

ldap_conf

ldap

todo

email

slapd_conf

amavisd

dkim

sieve

config

verify