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==== Debian-Installation ====
  * [[linux:debian|Installation von GNU/Debian auf Hardware oder virtueller Instanz]]
  * [[linux:debian:nics|zweite Netzwerkkarte mit wechselnder Konfiguration]]
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==== securing DNS and Mail ====
  * [[linux:dnssec|Domain Name System Security Extensions (DNSSEC) mit Bind9]]
  * [[linux:TLSA|DNS-based Authentication of Named Entities (DANE) und TLS Authentication record (TLSA)]]
  * [[linux:email:spf|Sender Policy Framework (SPF)]]
  * [[linux:email:dkim|DomainKeys Identified Mail (DKIM)]]
  * [[linux:email:dmarc|Domain-based Message Authentication, Reporting and Conformance (DMARC)]]
  * [[linux:email:arc|Authenticated Received Chain (ARC)]]
  * [[linux:srs|Sender Rewrite Scheme (SRS)]]
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==== email ====
  * [[linux:email:email|MTA/SMTPd Postfix (Mailserver, Mailgateway, Anti-Spam [AMaVISd-new, SpamAssassin, dSpam], SPF, DKIM, PFS etc.)]]
  * [[linux:email:cyrus|MDA/IMAPd Cyrus]]
  * [[linux:email:dovecot|MDA/IMAPd Dovecot]]
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==== Kommunikations-Server ====
  * [[linux:commserv|Setting up a communications-server (groupware, fax)]]
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==== Monitoring ====
  * [[linux:monitoring|Monitoring mit Icinga]]
  * [[linux:monitoring|Monitoring mit Check-MK]]
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==== ejabberd ====
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  * [[linux:ejabberd:neues_Certificate|Neues Certificate für ejabberd installieren]]
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==== Krustelkiste / Sonstiges ====
  * [[linux:lvm:index|Logical Volume Manager (LVM)]]
  * [[linux:bash:hotkeys|BASH Hotkeys / Tastatur-Kürzel]]
  * [[linux:diff:Verzeichnisse_vergleichen|Verzeichnisse mit 'diff' vergleichen]]
  * [[linux:ssh:tipps|SSH Tipps]]
  * [[linux:tls:tls|SSL-/TLS-Zertifikate]]
  * [[linux:sed:tipps|SED Tipps]]
  * [[linux:suse-install-server:index|Setting up an openSUSE httpd-install-server]]
  * [[linux:tipps:index|Code and snippets, tipps 'n tricks]]
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  * [[intern|Interne Seiten]]
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