ClamAV

Klark and Klara Launch Self-Hosted Corporate Messenger and Task Manager for On-Premise Data Control

Klark and Klara are two integrated products designed to keep corporate communication and task management entirely within company infrastructure. Klark functions as a Telegram-like messenger with personal chats, supergroups, channels, voice messages, file sharing, and video calls powered by LiveKit. Klara serves as a streamlined task and knowledge base system replacing complex setups like Jira and Confluence. Both run via Docker Compose on customer servers using PostgreSQL, Redis, FastAPI, and React, with built-in antivirus scanning via ClamAV. Key security measures include mandatory TOTP two-factor authentication, LDAP integration, content security policies, and automatic session invalidation on token reuse. The combination allows direct task creation from chat messages and displays tasks alongside conversations in a unified interface.

Building a Minimal Open Source Security Stack for Infrastructure Protection

The article outlines a practical approach to assembling a basic cybersecurity stack using open source tools for organizations with limited budgets. It covers endpoint protection with ClamAV, network perimeter defense via pfSense including Snort and Suricata integration, centralized logging with ELK Stack or Wazuh, and identity management through Keycloak. The guide emphasizes that these solutions provide foundational capabilities but require careful configuration, regular updates, and community validation to avoid risks from unmaintained projects. Detailed installation steps, rule configuration examples, and integration advice are provided for each component. The author stresses that open source options serve as an entry point rather than a full replacement for commercial platforms like Kaspersky or Symantec.

Corporate Nextcloud Security Gaps: Default Settings, Antivirus Failures and Open Source Integration Challenges

A detailed analysis from K2Tech reveals that corporate Nextcloud deployments require extensive security hardening beyond default open source configurations. The article examines integration with LDAP, WAF, Anti-DDoS and multiple antivirus engines including ClamAV, Kaspersky Scan Engine and PT Sandbox over ICAP. Critical issues include antivirus plugins bypassing scans during unreachable states or chunked file uploads via MOVE commands, allowing infected files to reach S3 storage. Performance tests on identical 4 vCPU and 16 GB RAM hardware showed Kaspersky Scan Engine delivering the highest throughput while PT Sandbox imposed heavy CPU loads. The piece also covers architecture spanning MariaDB Galera, Redis, Elasticsearch and multi-AZ S3, plus the need for custom parameter tuning and continuous testing due to frequent Nextcloud releases. Overall, the report emphasizes that true corporate-grade security for open source file sharing demands significant post-installation effort and monitoring.