Networks that
stay up.
I'm Bernard Eshun — a network engineer building secure, scalable and reliable networks that power modern businesses, and developing deeper expertise in cybersecurity.
I support enterprise LAN, WAN and Wi-Fi across multi-site client environments — designing, implementing and troubleshooting the routing, switching and firewall infrastructure that keeps them connected.
Networking
1 publishedRouting, switching and Wi-Fi across multi-site enterprise environments. Three years in the field; CCNP Enterprise and CCNA.
Network security
First write-ups in preparationFirewalls, IPsec VPN, access control and hardening — at work and in the lab. CySA+, Security+ and CSAP.
Ethical hacking
First write-ups in preparationAuthorised lab practice in offensive techniques — studied to understand how networks are attacked, and defended.
Networking
1 publishedRouting, switching and Wi-Fi across multi-site enterprise environments. Three years in the field; CCNP Enterprise and CCNA.
Network security
First write-ups in preparationFirewalls, IPsec VPN, access control and hardening — at work and in the lab. CySA+, Security+ and CSAP.
Ethical hacking
First write-ups in preparationAuthorised lab practice in offensive techniques — studied to understand how networks are attacked, and defended.
Built, broken and verified.
Labs built and pushed to a working end state — designs implemented against a spec, then verified.
All work →Known good.
A claim is only as good as the output behind it. Each write-up follows the shape of the work, then ends the same way: in a state proven by real configuration and console output.
Networking labs
- 01Observe
- 02Build
- 03Configure
- 04Verifyknown good
- 05Break
- 06Troubleshootknown good
Security projects
- 01Scope
- 02Design
- 03Harden
- 04Test
- 05Verifyknown good
Ethical-hacking labs
- 01Scope & authorisation
- 02Enumerate
- 03Exploit
- 04Evidence
- 05Remediate & re-testknown good
Chapters follow the work, not a template. The ending doesn't change.
Who you'd be hiring
Network engineer with three years' hands-on experience supporting enterprise LAN, WAN and Wi-Fi infrastructure across multi-site client environments, certified to Cisco CCNP Enterprise and CCNA level.
Most of that work happens on site: commissioning switches, routers and access points, isolating connectivity faults across the physical, data link and network layers, and working alongside remote NOC teams to close incidents inside SLA. What I don't get to touch at work, I build at home — the labs on this site come from a rack of virtual kit I break on purpose.
- Currently
- Field Engineer at AVASO Technology Solutions
- Citizenship
- British citizen
- Licence
- Full UK driving licence
- Available for
- Site-based and field network roles
Tools I work with
Day to day across routing, switching, firewalls, packet analysis and the server platforms that sit behind them.
Routing & switching
- OSPF, EIGRP and static routing
- VLANs and 802.1Q trunking
- Inter-VLAN routing, STP
- NAT/PAT, DHCP, DNS
Security & edge
- Palo Alto and pfSense firewalls
- Site-to-site & remote access IPsec
- ACLs and access control
- Network hardening, SSH
Operations
- Wireshark and packet analysis
- Fault isolation, layer 1 to 3
- Windows Server, Active Directory
- Linux — RHEL and Ubuntu
Credentials & achievements
Continuously learning and staying current with industry standards.