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:

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…

fully_encrypted_debian

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

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

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 -

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…

custom-image

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:59:56 +0000

OpenWRT Custom Image erzeugen Für D-Link 825 B1/C1: Barrier Breaker for ar71xx architecture cd ~ mkdir openwrt && cd openwrt wget http://downloads.openwrt.org/snapshots/trunk/ar71xx/OpenWrt-ImageBuilder-ar71xx_generic-for-linux-x86_64.tar.bz2 tar -xvjf OpenWrt-ImageBuilder-ar71xx_generic-for-linux-x86_64.tar.bz2 cd OpenWrt-ImageBuilder-ar71xx_generic-for-linux-x86_64

tipps

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 15:00:06 +0000

SED-Tipps Kommentare mit # und Leerzeilen herausfiltern: sed -e '/^#/d' -e '/^$/d' Kommentar entfernen, bei dem ausschliesslich Leerzeichen oder Tabulatoren vor der Raute stehen: sed -e '/^*#/d' -e '/^$/d' Eingabe-Datei > Ausgabedatei Löschen aller Zeilen, die höchstens Leerzeichen beinhalten:

config

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

eGroupWare Version 1.4.001 pre-requisites: * required PHP version 4.3+ (recommended 5+) * php.ini: safe_mode = Off * php.ini: magic_quotes_runtime = Off * php.ini: register_globals = Off * php.ini: memory_limit >= 16M * php.ini: max_execution_time >= 30

config

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

GOsa GOsa is a GPL'ed PHP based administration tool for managing accounts and systems in LDAP databases. It administers users and groups, mail distribution lists, thin clients, applications, phones and faxes. Get GOsa from: Project homepage:

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).

lvm_backup

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:48:07 +0000

LVM-Backup mit Duplicity Tim Riemenschneider #!/bin/sh # The Archive is encrypted with this (since it is transfered to FTP) export PASSPHRASE="foo" # The FTP-password (not exposed at cmdline export FTP_PASSWORD="bar" # Do a fullbackup weekly OPTIONS="--full-if-older-than 14D" KEEPFULLS=5 # Where to backup to TARGETBASE=ftp://user@server/backups/ #TARGETBASE=file:///tmp/test function create_mysql_snap { /usr/bin/mysql --defaults-extra-file=/et…

pear_makerpm

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

PEAR and PECL What is PECL? PECL is a repository for PHP Extensions, providing a directory of all known extensions and hosting facilities for downloading and development of PHP extensions. The packaging and distribution system used by PECL is shared with its sister, PEAR.

config

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

PHP5 configuration for GOsa and eGroupWare eGroupWare When I added about 250 users to a group in GOsa or in eGroupWare, I encountered the following problem with (open)SUSE 10.2, which I did not encounter with SUSE 10.0: station7: suhosin[373]: ALERT - configured request variable limit exceeded - dropped variable \ 'account_user[]' (attacker '172.16.130.9', file '/srv/www/htdocs/egroupware/index.php')

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…

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

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…

paketverwaltung

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:47:19 +0000

Debian-Paketverwaltung: Debian-Paket selbst bauen: ---------- \ß Anzeige aller installierten Pakete ---------- (

postgrey

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 16:02:27 +0000

Greylisting For a overview what greylisting does, have a look at www.greylisting.org/ There are several greylisting daemons for Postfix available. I stick to David Schweikert's Postgrey or to Lionel Bouton's SQLgrey in combination with it's web-interface http://www.vanheusden.com/sgwi/ Postgrey Postgrey greylisting daemon

spamassassin

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:58:39 +0000

SpamAssassin SA-config-genarator: /etc/mail/spamassassin/local.cf: # SpamAssassin config file for version 3.x # NOTE: NOT COMPATIBLE WITH VERSIONS 2.5 or 2.6 # See http://www.yrex.com/spam/spamconfig25.php for earlier versions # Generated by http://www.yrex.com/spam/spamconfig.php (version 1.50) # How many hits before a message is considered spam. required_score 5.0 # Encapsulate spam in an attachment (0=no, 1=yes, 2=safe) report_safe …

sarg

anonymous@undisclosed.example.com (Anonymous) — Fri, 15 Aug 2014 20:46:20 +0000

SARG /etc/crontab: ### SQUID-Monitoring via Sarg: 00 06-19/1 * * * root /usr/local/chhaas-skripts/sarg-reports.sh today > /dev/nul 00 00 * * * root /usr/local/chhaas-skripts/sarg-reports.sh daily > /dev/nul 00 01 * * 1 root /usr/local/chhaas-skripts/sarg-reports.sh weekly > /dev/nul 30 02 1 * * root /usr/local/chhaas-skripts/sarg-reports.sh monthly > /dev/nul

gnarwl

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:50:23 +0000

Gnarwl Download GNARWL software from and download package named gnarwl-3.3.tgz Compile GNARWL for LDAP vacations # tar xzvf gnarwl-3.3.tgz # cd gnarwl-3.3 # ./configure # make # make install # make perm Adjust File /usr/local/etc/gnarwl.conf map_sender $sender map_receiver $recepient map_subject $subject map_field $fullname cn map_field $deputy mail server localhost port 389 scope sub login cn=admin,dc=example,dc=org password IveGotASe…

gosa2egw

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

patching GOsa for seamless eGroupWare integration "-------- Original-Nachricht --------" Betreff: Re: [GOsa] gosa+samba3.schema conflicts with evolutionPerson.schema Datum: Tue, 5 Jun 2007 15:23:31 +0200 Von: Cajus Pollmeier An: GONICUS site administration project These are from two different RFCs, I guess. Bad luck. GOsa uses dateOfBirth internally. So, the simpliest way would be to remove the definition from the gosa+samba3.schema and add the ali…

config

anonymous@undisclosed.example.com (Anonymous) — Fri, 15 Aug 2014 20:44:51 +0000

Squid configuration */etc/squid/squid.conf: icp_port 0 htcp_port 0 hierarchy_stoplist cgi-bin ? cache_swap_low 90 cache_swap_high 95 maximum_object_size 4096 KB ipcache_size 1024 ipcache_low 90 ipcache_high 95 fqdncache_size 1024 cache_access_log /var/log/squid/access.log cache_dir ufs /var/cache/squid 240000 32 256 cache_log /var/log/squid/cache.log cache_mem 3000 MB cache_store_log /var/log/squid/store.log emulate_httpd_log off mime_table /etc/squid/mime.conf log_mime_hdrs off useragent_log…

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…

sasl

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:56:42 +0000

SASL A very conveniant way of configuring the Simple Authentication and Security Layer (SASL) is to use the Pluggable Authentication Modules (PAM), since it can use diffrent authentication sources like ldap or /etc/passwd - thus SASL is everything but simple

spamreport

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:54:58 +0000

Spamreport spamcheck.sh #!/bin/bash ######################################################### # UKBW-Spam-Report, 2007-05-01, chhaas, IuK / Netzwerke # ######################################################### #set -o verbose ######## # ToDo # ######## # - printvariablen bei "grep X-Spam-Status:" korrigieren # - Mail an antispam@uk-bw.de zusammenfassen: 1 Mail die alle Spammails inkl. Empfaenger beinhaltet # - Variablen fuer FROM: und RETURN-PATH einrichten # - evtl. SpamAssassin Spam-T…

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

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…

pfs

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:56:15 +0000

Postfix Perfect Forwarding Secrecy (PFS) openssl gendh -out /etc/postfix/dh_512.pem -2 512 openssl gendh -out /etc/postfix/dh_1024.pem -2 1024 postconf -e "smtpd_tls_dh1024_param_file = /etc/postfix/dh_1024.pem" postconf -e "smtpd_tls_dh512_param_file = /etc/postfix/dh_512.pem" postconf -e "smtpd_tls_eecdh_grade = strong" postconf -e "tls_preempt_cipherlist = yes" postconf -e "smtpd_tls_loglevel = 1" postconf -e "smtp_tls_loglevel = 1" postfix reload

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/…

relayhost

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:56:33 +0000

Postfix configuration for a relayhost (MX) / Anti-SPAM-/UCE-settings smtpd (smtp + daemon) = server = Postfix receives mail from a client smtp = client = Postfix sends mail to another mailserver used Ports: 10023/tcp: postgrey 10024/tcp: amavisd-new 10025/tcp: policyd-weight

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]

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.

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

index

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:59:22 +0000

Logical Volume Manager (LVM) die generelle Struktur bei LVM: Physical Volums (pv) werden in Volume Groups (vg) gruppiert, darin werden dann die Logical Volumes (lv) angelegt. Die entsprechenden Befehle fangen immer mit pv, vg oder lv an. Ein neues Device fuer LVM vorbereiten:

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…

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…

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…

operation

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:53:27 +0000

AmaViSd-new Operation emails aus der Quarantäne releasen: Wenn AMaViSd emails in die Quarantäne verschiebt, erhält man emails dieser Form: Betreff: BANNED contents (text/x-msdos-batch,.asc,bacula_after_failure.cmd) in mail FROM LOCAL [...] No viruses were found. Banned name: text/x-msdos-batch,.asc,bacula_after_failure.cmd Content type: Banned Internal reference code for the message is 11606-02/IJvAMUUAzNma [...] The message has been quarantined as: I/banned-IJvAMUUAzNma The message W…

ssh-smtp-tunnel

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:57:08 +0000

SMTP-over-SSH-Tunnel Um zwei SMTP-Server (z.B. Mailserver im Heim-Netz zu Mailgateway bei Provider/Hoster) sicher miteinander zu verbinden, gibt es verschiedene Möglichkeiten. OpenVPN-Tunnel Eine Möglichkeit ist, ein OpenVPN-Tunnel zwischen beiden Servern.

temper1

anonymous@undisclosed.example.com (Anonymous) — Tue, 25 Apr 2017 14:59:45 +0000

Temperaturmessungen mit dem TEMPer1 USB sensor Vor einiger Zeit begann ich zuhause mir einen kleinen Serverraum einzurichten - mein Datenklo ;-). In diesem Serverraum sollte natürlich auch die Raumtemperatur mit Icinga oder Nagios überwacht werden. - Natürlich gibt es verschiedene quasi out-of-the-box Lösungen, wie z.B.

hackerbruecke.net

hardware

amavisd

fully_encrypted_debian

all

sieve

custom-image

tipps

config

config

monitoring

lvm_backup

pear_makerpm

config

ca

cyrus_secure

slapd_conf

paketverwaltung

postgrey

spamassassin

sarg

gnarwl

gosa2egw

config

config

sasl

spamreport

config

ldap

pfs

postfix_secure

relayhost

sign

dnssec

neues_certificate

index

openssl_ca

ldap_conf

pam

operation

ssh-smtp-tunnel

temper1