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243 launch guides · 2601 reviewed steps
4 of 243 guides

System Administration · Networking & DNS · High Availability & Reliability · Cloud & Infrastructure

Deploy Windows Server 2025 DHCP scopes, reservations, and failover

Build an authorized two-server DHCPv4 service with reviewed IPAM, inactive-first scope creation, internal DNS options, shared secure updates, reservations, load-balanced failover, relay and maintenance tests, and isolated recovery.
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danger360 minadvanced11 stepsWindows Server

Services & Applications · Networking & DNS

Configure Exim4 as an internet mail server

Set a canonical identity, local domains, relay policy, DNS, TLS, aliases, queue monitoring, and end-to-end SMTP tests on Debian or Ubuntu.
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caution90 minadvanced8 stepsExim4

Services & Applications · Networking & DNS

Configure Exim4 to relay outbound mail through a smarthost

Route non-local mail to an authenticated TLS relay, protect credentials, preserve local delivery, rewrite identities deliberately, and test failure behavior.
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caution60 minintermediate8 stepsExim4

Services & Applications · Networking & DNS

Configure Postfix as an internet mail server

Set canonical identity, destinations, trusted networks, relay restrictions, DNS, TLS, aliases, logging, and end-to-end tests without becoming an open relay.
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caution90 minadvanced8 stepsPostfix