Port 4899Radmin Remote Administration
Radmin is a remote control software solution for remote desktop management and access. It enables administrators and users to connect to remote computers for tasks such as troubleshooting, configuration, or support. While primarily used for legitimate remote administration, its powerful capabilities have also made it a tool of choice exploited by cybercriminals and malware, frequently associated with unauthorized access if not properly secured..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 2/10
- lookups
- 28,335
2 transports registered
payload readable on path
registered with iana
safe
rank 46 of 993 · top 5%
Technical Details
what runs on :4899Overview: Radmin (Remote Administrator) is a proprietary remote desktop software developed by Famatech. It enables users to fully control another computer over a network or the Internet. Functionally, it provides screen sharing, file transfer, remote shutdown, chat, and Telnet access. Communication can occur over both TCP and UDP on port 4899.
Functions and Capabilities: Radmin offers high-speed screen updates and supports multiple connection modes, including full control, view only, file transfer, and chat. It is widely utilized among IT departments and system administrators due to its performance and feature set. Despite being a commercial product, unlicensed or older versions might have vulnerabilities.
Port Details: Port 4899 is officially assigned by IANA for Radmin's use. TCP is primarily used for control communication and screen data transfer, while UDP functionality can be employed for certain connection optimizations. This port is often probed by network scans due to Radmin's dual legitimacy and history of exploitation.
Security Information
exposure of :4899risk score
2/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
security averages 3.8 across 216 ports — this one sits 1.8 below.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unauthorized access if weak or default credentials are used.
- Exploitation by attackers who install the Radmin server module covertly as part of malware or backdoors.
- Lack of encryption in older or misconfigured versions could allow interception of credentials and data.
- Port exposure increases attack surface, making it targetable for brute-force or enumeration attacks.
Common Mitigations:
- Enforce strong, complex authentication credentials and restrict administrative access.
- Deploy Radmin with integrated encryption, or tunnel connections over secured VPNs or SSH.
- Monitor and restrict access to port 4899 using network firewalls or intrusion prevention systems.
- Regularly audit endpoint software installations and remove unauthorized remote control applications.
- Keep all software up-to-date, patching known vulnerabilities promptly.
Related Ports
the 8 most looked-up other ports in security — 216 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
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| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Squid Proxy HTTP | TCP | Web Services | caution | 45.8k |
| :8080 | HTTP Alternate | TCPtls | Web Services | caution | 44.9k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
risk mix of the 8 listed
- caution100%
3 of 8 encrypted