- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 4888: xcap code analysis portal public user access
Port 4888 is assigned by IANA to xcap-portal (xcap code analysis portal public user access).
4888
How xcap-portal works
Other servicesThe client sends a request to port 4888 and the xcap-portal service answers.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Other services
Is port 4888 dangerous?
We have no specific security note for port 4888. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4888
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| xcap-portal | 4888 | TCP | xcap code analysis portal public user access | - | 2018-06-06 |
| - | 4888 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4888, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4888' # process listening on 4888
sudo lsof -nP -i :4888macOS
sudo lsof -nP -i :4888
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4888 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4888 netstat -ano | findstr :4888
From another machine
nmap -p 4888 -sV <host> nc -zv <host> 4888
Block it in the firewall
sudo ufw deny 4888/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4888" -Direction Inbound -LocalPort 4888 -Protocol TCP -Action Block # Windows
What is port 4888 used for?
Port 4888 is assigned by IANA to xcap-portal (xcap code analysis portal public user access).
Is port 4888 TCP or UDP?
Port 4888 is registered for TCP.
Is it safe to open port 4888?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.
How do I check if port 4888 is open?
On Linux run "ss -ltnup 'sport = :4888'", on macOS "lsof -nP -i :4888", and on Windows "netstat -ano | findstr :4888" to see the local process. From another machine, "nmap -p 4888 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp