All ports
Port1845/UDP
altalinkPort
1845
Protocol
UDP
Category
Registered
Service
altalink
What is port 1845?
Port 1845/UDP is a Registered port, registered with IANA for specific applications. It is associated with the altalink service.
altalink
Useful commands
nmapnmap -p 1845 -sV example.comnetcatnc -zv example.com 1845curlcurl -v http://example.com:1845/telnettelnet example.com 1845bash(echo > /dev/udp/example.com/1845) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1845/udpDeny
sudo ufw deny 1845/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1845 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1845 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1845/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1845" dir=in action=allow protocol=UDP localport=1845Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 1845/UDP?
Port 1845/UDP is associated with the altalink service. altalink
Is it safe to expose port 1845 to the Internet?
It depends on the service and configuration. Port 1845 (altalink) 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 1845 is open?
You can use nmap: `nmap -p 1845 -sV example.com`, netcat: `nc -zv example.com 1845`, or the bash command: `(echo > /dev/udp/example.com/1845) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1845 on my firewall?
On Linux with UFW: `sudo ufw allow 1845/udp` (open) or `sudo ufw deny 1845/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1845 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1845" dir=in action=allow protocol=UDP localport=1845`.
What applications and services use port 1845?
Port 1845/UDP is used by the altalink service. Specific uses depend on the software and configuration. Check our related tools section for more information.