All ports
Port8243/TCP
synapse-nhttpsPort
8243
Protocol
TCP
Category
Registered
Service
synapse-nhttps
What is port 8243?
Port 8243/TCP is a Registered port, registered with IANA for specific applications. It is associated with the synapse-nhttps service.
Synapse Non Blocking HTTPS
Useful commands
nmapnmap -p 8243 -sV example.comnetcatnc -zv example.com 8243curlcurl -v http://example.com:8243/telnettelnet example.com 8243bash(echo > /dev/tcp/example.com/8243) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 8243/tcpDeny
sudo ufw deny 8243/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 8243 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 8243 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=8243/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 8243" dir=in action=allow protocol=TCP localport=8243Security Risks
- Incorrect TLS/SSL configuration
- Man-in-the-Middle attacks if certificate is invalid
- Protocol implementation vulnerabilities
- Exposure of web services with weak authentication
Frequently Asked Questions
What service runs on port 8243/TCP?
Port 8243/TCP is associated with the synapse-nhttps service. Synapse Non Blocking HTTPS
Is it safe to expose port 8243 to the Internet?
It depends on the service and configuration. Port 8243 (synapse-nhttps) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 8243 is open?
You can use nmap: `nmap -p 8243 -sV example.com`, netcat: `nc -zv example.com 8243`, or the bash command: `(echo > /dev/tcp/example.com/8243) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 8243 on my firewall?
On Linux with UFW: `sudo ufw allow 8243/tcp` (open) or `sudo ufw deny 8243/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 8243 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 8243" dir=in action=allow protocol=TCP localport=8243`.
What applications and services use port 8243?
Port 8243/TCP is used by the synapse-nhttps service. Specific uses depend on the software and configuration. Check our related tools section for more information.