A Smarter Way to Bypass CG-NAT and Restore Network Reliability
Many ISPs use CG-NAT with strict state limits that can disrupt VoIP, video feeds, and remote access by pruning active connections once thresholds are reached.
Netcelero i-ctrl creates a secure tunnel that uses minimal states while supporting over 65,000 internal connections, bypassing CG-NAT constraints.
This solution ensures reliable performance for VoIP, CCTV, VPNs, and cloud access – ideal for businesses using 4G, Starlink, or other CG-NAT-limited networks.
If you’ve ever experienced patchy VoIP calls, laggy video feeds, or sluggish remote desktop access, despite having enough bandwidth, the issue might not be your connection speed. It could be your ISP’s use of Carrier-Grade NAT (CG-NAT) and its hidden state limits. Thankfully, Netcelero’s i-ctrl offers a powerful way to bypass these constraints, unlocking the full potential of your internet connection.
What Is CG-NAT – and Why It’s a Problem
To conserve public IPv4 addresses, most Internet Service Providers (ISPs) place customers behind CG-NAT systems. This allows multiple users to share a single public IP. While it’s a clever workaround, CG-NAT comes with a serious limitation: a cap on the number of ‘states’ allowed per user, often around 1,200.
In networking, a state is essentially an active session; like a phone call, a video stream, or even a web page open on your browser. Every connected device, and every app on those devices, consumes states. On busy networks – such as offices, sites with CCTV systems, or smart-enabled homes, these states add up quickly.
When that 1,200-state ceiling is reached, CG-NAT systems begin dropping existing connections to make room for new ones. The result? VoIP call dropouts, frozen video feeds, broken VPN tunnels, and unpredictable performance– even when your speed test results look great.
Enter Netcelero’s i-ctrl: A Smarter Approach to Connectivity
Netcelero’s i-ctrl solves this problem with smart simplicity and technical innovation. Rather than trying to increase the number of states available (which ISPs don’t allow), the i-ctrl works by establishing a secure, encrypted tunnel through the CG-NAT barrier.
This tunnel typically uses fewer than ten states, regardless of how many connections are active inside it. Behind the scenes, the i-ctrl can manage over 65,000 simultaneous connections, giving your network room to breathe.
Real Benefits, Not Just Theoretical Gains
The performance impact is immediate and measurable:
- Improved VoIP reliability – No more random call drops due to state exhaustion.
- Consistent speeds – Your connection remains stable even under high usage.
- Better remote access – VPNs, RDP sessions, and cloud tools remain uninterrupted.
- Future-proof networking – Easily handle growing device counts or new applications.
And because the i-ctrl provides a full static public IP, it’s ideal for advanced use cases such as IPSEC, multiple VLANs, remote CCTV monitoring, and multi-site VPN architectures.
Who Benefits Most?
This solution is especially valuable for:
- Businesses deploying VoIP or cloud-based systems over non-standard connectivity.
- IT managers battling with CG-NAT in rural, mobile, or satellite-based networks.
- CCTV installers who need resilient, secure remote access on 4G or Starlink.
- Security monitoring centres relying on uninterrupted live feeds.
Unlock Your Network’s Potential
CG-NAT may be a reality you can’t escape, but its limitations don’t have to define your network. With Netcelero’s i-ctrl, you can bypass those invisible bottlenecks and enjoy a reliable, secure, and scalable connection that’s fit for the future.
Ready to take control? Contact Netcelero today to find the best i-ctrl configuration for your site.
