LPIC-2 202-450 case studies
LPIC-2 202-450 · Put your knowledge to work in context.
LPIC-2 is the second level in the multi-level professional certification program of the Linux Professional Institute (LPI), and the 202-450 exam is one of the two exams required for it. According to LPI, LPIC-2 "will validate the candidate's ability to administer small to medium–sized mixed networks," which makes it a natural next step for administrators who already hold LPIC-1 and now manage real services rather than single hosts. The LPIC-2 202-450 case studies are 5 cases and about 4,690 words.
1Stale Secondary Zones After a Primary Rebuild
Your organisation runs BIND 9.16 on Debian 11. The hidden primary ns1.priv (10.10.1.10) holds example.com; secondaries ns2 (172.16.5.20) and ns3 (172.16.5.21) in the DMZ answer public queries.
947 words, about 5 min2Reverse Proxy Breaks Scheme Detection, Uploads and Client IPs
An e-commerce site runs nginx 1.18 as TLS terminator and cache in front of Apache 2.4.54 with mod php on 127.0.0.1:8080. nginx proxies everything with proxy pass http://127.0.0.1:8080; and terminates HTTPS with a valid certificate.
916 words, about 5 min3Duplicate Share Definition Silently Overrides the Samba Config
fileserv runs RHEL 8 with Samba 4.13 in standalone mode ( security = user , tdbsam backend). The share [projects] must be read-write for the local group devs (GID 10001).
995 words, about 5 min4Relay Authentication Fails After a Password Rotation
mailgw runs Postfix 3.4 on Ubuntu 20.04 and relays all outbound mail through the ISP submission service at [smtp.isp.example]:587. Relevant settings are relayhost , smtp use tls = yes , smtp tls security level = may , smtp sasl auth enable = yes , smtp sasl password maps = hash:/etc/postfix/sasl passwd , and smtp sasl security options = noanonymous .
910 words, about 5 min5OpenSSH 8.9 Rejects an Old RSA Key While fail2ban Locks Out an Office
bastion is an Ubuntu 22.04 jump host running OpenSSH 8.9p1. sshd config sets PasswordAuthentication no , PubkeyAuthentication yes , AllowGroups ssh-users , AuthorizedKeysFile .ssh/authorized keys , StrictModes yes and LogLevel INFO .
922 words, about 5 min