All ports
Port1227/TCP
dns2goPort
1227
Protocol
TCP
Category
Registered
Service
dns2go
What is port 1227?
Port 1227/TCP is a Registered port, registered with IANA for specific applications. It is associated with the dns2go service.
DNS2Go
Useful commands
nmapnmap -p 1227 -sV example.comnetcatnc -zv example.com 1227curlcurl -v http://example.com:1227/telnettelnet example.com 1227bash(echo > /dev/tcp/example.com/1227) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1227/tcpDeny
sudo ufw deny 1227/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 1227 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 1227 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1227/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1227" dir=in action=allow protocol=TCP localport=1227Security Risks
- DNS cache poisoning attacks
- DDoS amplification using open DNS resolvers
- Information disclosure of internal subdomains
- Domain hijacking if DNS server is misconfigured
Frequently Asked Questions
What service runs on port 1227/TCP?
Port 1227/TCP is associated with the dns2go service. DNS2Go
Is it safe to expose port 1227 to the Internet?
It depends on the service and configuration. Port 1227 (dns2go) 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 1227 is open?
You can use nmap: `nmap -p 1227 -sV example.com`, netcat: `nc -zv example.com 1227`, or the bash command: `(echo > /dev/tcp/example.com/1227) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1227 on my firewall?
On Linux with UFW: `sudo ufw allow 1227/tcp` (open) or `sudo ufw deny 1227/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 1227 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1227" dir=in action=allow protocol=TCP localport=1227`.
What applications and services use port 1227?
Port 1227/TCP is used by the dns2go service. Specific uses depend on the software and configuration. Check our related tools section for more information.