VPN
Solutions
Discover our cutting-edge VPN solutions designed for our clients to meet the growing need for secure and private online communication. We employ traffic obfuscation, dynamic IP allocation, AES-256 encryption, and failover mechanisms to ensure uninterrupted service.
At Promwad, we leverage the latest innovations in the industry and provide end-to-end cybersecurity software engineering services. Our team can build tailor-made solutions from scratch, integrate them into embedded systems, and modernise your legacy telecom software.
VPN solutions at Promwad include tools and services for establishing encrypted connections to private networks over the Internet. We can be your reliable technology partner, providing cybersecurity software engineering services to incorporate VPN features into your products and infrastructure.
We develop custom solutions for personal software providers to enhance online privacy, bypass geo-restrictions, and encrypt internet traffic for individual users.
We create enterprise solutions to enable secure remote access for employees in a distributed network of offices and corporate VPN providers.
We add advanced VPN features to telecom equipment: network servers, routers, VPN gateways, network appliances, WiFi and IoT devices, and data storage.
For regulated markets, we build the VPN stack on FIPS 140-3-validated cryptography and align device security with the EU Cyber Resilience Act, ready for US federal and EU procurement.
Architecture design
Our key principles when designing robust and scalable architectures include the following:
Client-side VPN app development
We develop user-friendly client VPN solutions with seamless integration across various platforms, including Linux, Windows, macOS, iOS, and Android, ensuring compatibility across multiple devices.
Our team implements tailor-made features such as automatic server selection, protocol switching, and intuitive settings to enhance the user experience.
Server-side app development
Our team specialises in server-side VPN app development, ensuring the smooth handling of incoming and outgoing traffic. We focus on:
VPN integration
Network integration services at Promwad include these processes:
Encryption and VPN security compliance
What we do within our security software development services:
Quality assurance and testing
We offer comprehensive VPN QA services, applying best testing practices to resolve any issues or vulnerabilities of your solution.
Our team employs manual and automated QA techniques and performs functional, compatibility, regression, penetration, and integration testing.
Deployment and configuration
We provide expert assistance in smooth VPN deployment and configuration. Our services include:
Ongoing maintenance
We offer post-deployment support and assistance to keep your software up-to-date as your business requirements evolve. What we do:
We built a mobile network router that provides reliable connectivity and traffic monitoring even in areas with limited network coverage.
The device offers enhanced security features, including VPN, Tor, StingRay surveillance blocking, and IMEI changing, providing additional protection against cyber threats.
The small mobile router includes an LTE modem and a WiFi module operating in dual-band 2.4GHz/5GHz, a power supply and a rechargeable battery.
At Promwad, we have developed a turnkey device for Internet access via LTE or 3G from three mobile operators simultaneously.
The device boasts several key features:
Our team ensured the client's router was secure and compliant with regulatory requirements by thoroughly testing various protocols. In this project, we used OPNsense, a robust firewall and open-source routing platform based on FreeBSD.
We extended the x86 hardware features with OPNsense, providing enhanced security mechanisms:
The result was a certified network router that met national security standards.
OpenVPN, WireGuard, IP security (IPSec), layer 2 tunnelling protocol (L2TP)/IPSec
Secure socket tunnelling, Shadowsocks, Obfsproxy
Rate limiting, classification and marking, queuing and scheduling, shaping and policing
Cryptographic coprocessors, FPGA to tailor specific encryption algorithms, hardware encryption blocks in ARM CPU
Post-quantum encryption (ML-KEM, ML-DSA per NIST FIPS 203/204, hybrid schemes), SSL/TLS, IKEv2, symmetric encryption (AES), asymmetric encryption (RSA, ECC), hash algorithms (SHA2, SHA-3)
FIPS 140-3-validated crypto modules, approved-mode configuration, NIST-approved algorithms (AES-GCM, SHA-2/SHA-3, ECDSA, ECDH), engineering aligned with CRA and FIPS 140-3
We assist startups in VPN app development by providing engineering teams to meet their challenges head-on, bridge resource gaps, and speed up business growth.
We provide comprehensive cybersecurity software engineering services for VPN providers and telecom equipment companies of any size.
We can be your reliable technology partner, building solutions tailored to your objectives. Our team is ready to become an integral part of your project.
Our clients include VPN providers and network equipment makers with their own security teams. They bring in Promwad when a VPN has to run inside a device, scale on servers, and meet regulatory requirements in several markets at once.
One cross-functional team of 100+ engineers covers the full VPN stack: embedded firmware for routers and gateways, server-side infrastructure, cloud, and client apps for Linux, Windows, macOS, iOS, and Android.
We engineer VPN products for your target markets: FIPS 140-3 for US federal and critical-infrastructure buyers, CRA-aligned security for the EU, and GDPR, CCPA, and CPRA data protection with data minimisation and consent management.
ML-KEM and ML-DSA (NIST FIPS 203/204) in hybrid schemes with classical algorithms, backed by our FPGA team and partnership with Lattice, so long-lifecycle products stay secure as quantum threats mature.
Selective encryption, configurable IP masking, DNS leak protection, traffic obfuscation, failover, and censorship and geo-restriction bypass, tailored to your product and users.
Flexible approach to suit your current needs
Perfect for evolving projects. You control the budget and milestones, while we ensure transparency and fast team scaling.
Your long-term engineering capacity — a self-managed, domain-focused team integrated into your workflow for steady, predictable delivery.
Ideal for well-defined tasks with clear outcomes. Scope, budget, and timelines are set upfront to guarantee predictable results.
Yes, on the engineering side. We integrate FIPS 140-3-validated crypto modules into your VPN stack, configure approved mode, define the cryptographic boundary, and prepare the technical groundwork an accredited lab expects.
For the EU market, we add CRA-aligned device security: secure boot, signed updates, SBOM, and vulnerability handling. Testing is performed by NIST-accredited laboratories and validation certificates are issued by the CMVP; we make sure your product arrives ready.
Post-quantum cryptography differs from traditional methods by utilising mathematical approaches resistant to attacks by quantum computers. It is critical for VPN security as quantum computers have the potential to break current encryption standards. Implementing post-quantum cryptography ensures long-term security and protection of sensitive data transmitted over VPN connections, safeguarding against future advancements in quantum computing technology.
The main challenges involve transitioning from traditional cryptographic algorithms, compatibility with existing systems, and performance implications due to the computational complexity of post-quantum algorithms. We overcome these challenges through careful algorithm selection, integration of hybrid encryption schemes, performance optimisation techniques, and ongoing research and collaboration with experts in the field.
Our network integration services involve analysing the existing network infrastructure, identifying compatibility issues, and implementing DPI network monitoring. To achieve seamless integration, our experts configure routers, firewalls, and other network devices to support VPN protocols, establish secure connections, and enable efficient traffic routing.
Our goal is to ensure that your new product seamlessly interacts with the network, enabling businesses to achieve uninterrupted communication while maintaining compatibility with various operating systems and platforms.
We handle them through robust mechanisms such as username/password authentication, multi-factor authentication, or integration with existing identity providers. Access control policies are enforced based on user roles, permissions, or specific criteria to ensure authorised access to resources.
We implement DNS leak protection at the VPN client level, use secure DNS resolvers, and perform rigorous testing to identify and mitigate potential vulnerabilities. We also adhere to best practices in encryption and tunnelling protocols to safeguard data transmission.
We employ comprehensive testing and adaptation methods to ensure seamless functionality across various environments. We consider platform-specific requirements, APIs, and networking frameworks to provide consistent performance and user experience across diverse systems.
