Nethence Systems - UNIX / Linux

UNIX / Linux | Distributed Storage | Cloud & Virtualization | Public Key Infrastructure | Blue-teaming

Infrastructure delivery

PXE install server

• BIOS & EFI-capable PXE install server
• deploy numerous system distributions unattended
• recovery modes available
• for servers and for (GNU/Linux) workstations

SMTP

Block spam during the smtp session!

• front-facing RBL-enabled anti-spam MX (inbound)
• SASL SMTP relay (outbound)
• DKIM & SPF setup (inbound / outbound)

Infrastructures

Aim for the 99.999 SLA!

• incident & performance monitoring (Zabbix vs. OMD)
• helpdesk & bug tracking

HA consulting

Spot the SPOF!

Old-school High-Availability

• MC/SG
• Linux-HA heartbeat (legacy version)

System integration

Our favorite basis for a customized systems is Slackware Linux however if you truly want something hardened to the extreme, we enfavor Musl-based distributions such as Sabotage and Alpine Linux. We otherwise enjoy working on the NetBSD operating system a lot: it particularly fits network-oriented goals and projects.

Keywords

Systems: GNU/Linux SunOS *BSD HP/UX AIX OpenVMS

Daemons: DNS DNSSEC DHCP PXE SMTP NSD BIND Unbound “ISC DHCP” Postfix Exim

Databases: Oracle RDBMS MySQL MariaDB MongoDB Redis redis-cluster Sentinel “Redis Streams” ELK “Elastic Search” Graylog

Monitoring: Nagios Monit M/Monit Zabbix “Zabbix API” InfluxDB

DevSecOps: NodeJS PM2 SupervisorD CI/CD Gitlab “Gitlab Runner” “AWS CLI” Ansible Terraform ClusterIt DSH

Security: IDS IPS Suricata Snort Zeek Dsniff Metasploit

Network: OSPF BGP SDN Cisco IOS QoS ALTQ CDN PF “Packet Filter” NPF “NetBSD Packet Filter” Netfilter NFTABLES VyOS “Cumulus Linux” VoIP SIP Asterisk H.323 “AWS VPC”

Radio: SDR HackRF RTL/E4000 GSM UMTS LTE LTE-A ADS-B