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LOG

Zabbix SNMP Switch Monitoring with LLD

Zabbix SNMP Switch Monitoring with LLD

Monitor switches and routers in Zabbix: enable SNMPv2c/v3 on devices, use templates with low-level discovery, and build triggers that catch real fault

admin admin 2026-09-15
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HPE 3PAR CLI: createvv, createhost and VLUNs

HPE 3PAR CLI: createvv, createhost and VLUNs

Provision HPE 3PAR/Primera storage from the CLI: make CPGs and thin volumes, create hosts with the right persona, and present VLUNs correctly.

admin admin 2026-09-15
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Dell PowerStore pstcli: Volume Provisioning Guide

Dell PowerStore pstcli: Volume Provisioning Guide

Provision Dell PowerStore storage with pstcli: create volumes and hosts, map LUNs, verify with show commands, and script it against the REST API.

admin admin 2026-09-15
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Unbound DNSSEC Validation: Setup and Debug

Unbound DNSSEC Validation: Setup and Debug

Turn on DNSSEC validation in Unbound: trust anchors, hardened options, verification with delv, and how to debug SERVFAIL from bogus answers.

admin admin 2026-09-15
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Linux conntrack: 'table full, dropping packet' Fix

Linux conntrack: 'table full, dropping packet' Fix

Fix nf_conntrack table full drops: raise nf_conntrack_max and hashsize safely, tune TCP timeouts, and cut the tracked flows you do not need.

admin admin 2026-09-15
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Cisco uRPF: Strict vs Loose Mode Anti-Spoofing

Cisco uRPF: Strict vs Loose Mode Anti-Spoofing

Deploy uRPF on Cisco IOS/IOS-XE correctly: strict vs loose mode, allow options, where to apply it, and how to avoid dropping valid asymmetric traffic.

admin admin 2026-09-15
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Proxmox VE Quorum Loss: Corosync Recovery Steps

Proxmox VE Quorum Loss: Corosync Recovery Steps

Diagnose Proxmox VE quorum loss and corosync failures: read pvecm status, avoid unsafe recovery, and restore quorum without corrupting the cluster.

admin admin 2026-09-15
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kube-proxy Modes: iptables vs IPVS vs nftables

kube-proxy Modes: iptables vs IPVS vs nftables

Compare kube-proxy iptables, IPVS and nftables modes: data structures, performance at scale, deprecation status and how to check what your cluster run

admin admin 2026-09-15
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MPO/MTP Polarity: Type A, B and C in Practice

MPO/MTP Polarity: Type A, B and C in Practice

Choose MPO/MTP polarity correctly for 40G, 100G, 400G and 800G parallel optics: Type A, B and C mapping, gender, and how to fix a dead link.

admin admin 2026-09-15
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OTDR Trace Interpretation: Events, Loss, Reflectance

OTDR Trace Interpretation: Events, Loss, Reflectance

Read an OTDR trace correctly: identify reflective and non-reflective events, expected loss and reflectance values, and separate bends from bad splices

admin admin 2026-09-15
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