Network Requirements

To successfully host GPU servers on Clore.ai, your network must meet these requirements.

Minimum Requirements

Parameter	Requirement
Download speed	100 Mbps minimum
Upload speed	100 Mbps minimum
Latency	< 100ms to major regions
IP type	Static or Dynamic (static preferred)

Note: Higher bandwidth results in better server ratings and more rentals.

Required Ports

The following ports must be accessible from the internet:

Port	Protocol	Purpose
22	TCP	SSH access (or custom SSH port)
8080	TCP	Jupyter Notebook (if enabled)
3000-4000	TCP	Application ports (configurable)
Custom	TCP/UDP	As defined in server settings

Firewall Configuration

UFW (Ubuntu)

# Allow SSH
sudo ufw allow 22/tcp

# Allow Jupyter
sudo ufw allow 8080/tcp

# Allow port range for applications
sudo ufw allow 3000:4000/tcp

# Enable firewall
sudo ufw enable

iptables

# Allow SSH
iptables -A INPUT -p tcp --dport 22 -j ACCEPT

# Allow Jupyter
iptables -A INPUT -p tcp --dport 8080 -j ACCEPT

# Allow port range
iptables -A INPUT -p tcp --dport 3000:4000 -j ACCEPT

# Save rules
iptables-save > /etc/iptables/rules.v4

NAT / Port Forwarding

If your server is behind a router:

1. Access router admin panel (usually 192.168.1.1)

2. Find Port Forwarding section

3. Forward required ports to your server's internal IP

4. Set static internal IP for your server

Example Port Forwarding Rules

External Port	Internal IP	Internal Port	Protocol
22022	192.168.1.100	22	TCP
8080	192.168.1.100	8080	TCP

Static vs Dynamic IP

Static IP (Recommended)

• Consistent connection for renters

• Better for DNS and bookmarks

• Higher server reliability rating

Dynamic IP

• Works but requires DDNS service

• IP changes may briefly interrupt rentals

• Configure DDNS client on your server:

# Example with ddclient
sudo apt install ddclient
sudo nano /etc/ddclient.conf

Bandwidth Considerations

Impact on Earnings

Speed	Impact
100 Mbps	Minimum - basic rentals
500 Mbps	Good - suitable for most ML workloads
1 Gbps+	Excellent - attracts premium renters

Monitoring Bandwidth

# Install monitoring tool
sudo apt install iftop

# Monitor in real-time
sudo iftop -i eth0

Network Testing

Speed Test

# Install speedtest
sudo apt install speedtest-cli

# Run test
speedtest-cli

Latency Test

# Test to common regions
ping -c 10 8.8.8.8        # Google DNS
ping -c 10 1.1.1.1        # Cloudflare

Port Accessibility Test

From outside your network, verify ports are open:

# Using nmap from another machine
nmap -p 22,8080 YOUR_PUBLIC_IP

# Or use online port checker
# https://www.yougetsignal.com/tools/open-ports/

Troubleshooting

Ports Not Accessible

1. Check firewall rules on server

2. Verify router port forwarding

3. Contact ISP - some block hosting

4. Try different port numbers

Slow Connection

1. Run speed test

2. Check for bandwidth throttling

3. Consider upgrading internet plan

4. Optimize server network settings:

# Increase network buffer sizes
sudo sysctl -w net.core.rmem_max=16777216
sudo sysctl -w net.core.wmem_max=16777216

Connection Drops

1. Check for IP address changes

2. Verify router stability

3. Monitor system logs: dmesg | grep -i network

4. Consider using ethernet instead of WiFi