Welcome to an even more secure Sealmetrics experience! We're excited to introduce IP-based access control, giving you complete control over who can access your analytics dashboard.
🔐 Your Security Matters
Now you can add an extra layer of protection to your Sealmetrics dashboard by restricting access to specific IP addresses. This enterprise-grade security feature ensures that only authorized users from approved locations can view your valuable analytics data.
Setting Up IP Access Control
Follow these simple steps on your screen to configure IP access:
Navigate to the Security Settings in your dashboard
Add the approved IP addresses or ranges
Save your configuration
Your team can continue accessing the dashboard seamlessly from the authorized IPs, while unauthorized access attempts will be automatically blocked.
CIDR (Classless Inter-Domain Routing) notation is a standardized method for representing IP address ranges. This guide will help you understand how CIDR works and its common applications in network configuration.
What is CIDR Notation?
CIDR notation consists of two parts:
An IP address (e.g., 192.168.1.0)
A suffix number after a forward slash (e.g., /24)
The suffix indicates how many bits are used for the network portion of the address, which determines the size of the IP range.
Common CIDR Examples Explained
Small Private Network Range
192.168.1.0/24
Range: 192.168.1.0 - 192.168.1.255
Total addresses: 256
Perfect for: Home networks or small office setups
Common usage: Local area networks (LANs)
Complete Private Network Range
192.168.0.0/16
Range: 192.168.0.0 - 192.168.255.255
Total addresses: 65,536
Perfect for: Medium-sized organizations
Common usage: Larger office networks with multiple departments
Large Corporate Network Range
10.0.0.0/8
Range: 10.0.0.0 - 10.255.255.255
Total addresses: 16,777,216
Perfect for: Large enterprises
Common usage: Corporate networks with multiple locations
Single Host Configuration
203.0.113.25/32
Range: Only 203.0.113.25
Total addresses: 1
Perfect for: Specific host targeting
Common usage: Firewall rules for individual servers
Common Private Network Ranges
172.16.0.0/12
Range: 172.16.0.0 - 172.31.255.255
Total addresses: 1,048,576
Perfect for: Medium to large organizations
Common usage: Private cloud infrastructures
Public IP Range Example
8.8.8.0/24
Range: 8.8.8.0 - 8.8.8.255
Total addresses: 256
Example includes: Google's famous DNS server (8.8.8.8)
Common usage: Public service networks
Understanding CIDR Numbers: The Key Rule
The CIDR number (the value after the /) works in a counter-intuitive way:
Larger CIDR numbers = Smaller networks
/32 = 1 IP address
/24 = 256 IP addresses
/16 = 65,536 IP addresses
Smaller CIDR numbers = Larger networks
/8 = 16,777,216 IP addresses
/12 = 1,048,576 IP addresses
Quick Reference Table
CIDRNumber of AddressesTypical Use Case/321Single host/24256Small network/1665,536Medium network/816,777,216Large network
Best Practices
Always plan your CIDR allocations before implementation
Leave room for network growth when assigning CIDR blocks
Document your CIDR allocations for future reference
Use appropriate CIDR sizes for your specific needs
Consider future expansion when selecting CIDR ranges
This guide should help you understand and implement CIDR notation effectively in your network configurations.