LOG 归档 - 第82页共139页

MikroTik RouterOS Firewall: Chains, Filters and Address Lists

Build a hardened RouterOS firewall: input/forward chains, connection states, dynamic address lists that auto-ban attackers, FastTrack, mangle and NAT.

admin 2026-09-06

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Linux Network Namespaces with ip netns and veth Pairs

Build isolated networks on Linux with ip netns: veth pairs, bridges, VLAN and VXLAN uplinks, per-namespace DNS, macvlan and cleanup.

admin 2026-09-06

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dig and nslookup: DNS Troubleshooting Commands Explained

Diagnose DNS failures with dig and nslookup: read status codes and flags, query specific resolvers, use dig +trace, validate DNSSEC and fix common fai

admin 2026-09-06

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IS-IS on Cisco IOS: NET Address, Levels and Configuration

Configure IS-IS on Cisco IOS: NET address structure, level-1 and level-2 adjacency rules, ip router isis, metric-style wide and a two-area example.

admin 2026-09-06

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Arista EOS Configuration Sessions: commit, abort, rollback

Stage Arista EOS changes in a configuration session: create, diff, commit, abort and commit timer auto-rollback, with eAPI automation and troubleshoot

admin 2026-09-06

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Cisco IOS DHCP Server: Pools, Exclusions and Options

Cisco IOS DHCP server setup: global excluded-address ranges, pool options, DNS and lease settings, static manual bindings, split scopes and verificati

admin 2026-09-06

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FortiGate Site-to-Site IPsec VPN: Phase 1 and Phase 2 Setup

Configure a FortiGate site-to-site IPsec VPN: phase 1 (IKE) and phase 2 (IPsec) settings, selectors, NAT-T, DPD, CLI verification and common failure f

admin 2026-09-06

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FC vs iSCSI vs NVMe-oF: Choosing a Storage Network Protocol

Compare Fibre Channel, iSCSI and NVMe-oF (NVMe/TCP, NVMe/RoCE, FC-NVMe) for SAN block storage, and match the transport to your workload and your team.

admin 2026-09-06

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SFP vs SFP+ vs SFP28 vs QSFP28: Types and Compatibility

SFP, SFP+, SFP28, QSFP+ and QSFP28 compared: lane counts, speeds, standards, vendor coding, DAC/AOC cables and the port compatibility rules that matte

admin 2026-09-06

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Linux Multipath Configuration: multipath.conf for iSCSI SAN

Configure Linux device-mapper multipath for iSCSI and FC SAN LUNs: multipath.conf defaults, ALUA path grouping, blacklists, timeouts, failover tests a

admin 2026-09-06

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