CyberHunter
Local dataset, no network
// Network services

Port 4774: Converge RPC

Port 4774 is assigned by IANA to converge (Converge RPC).

4774

How converge works

Network services
client:4774convergeresponse client:4774convergeresponse

The client sends a request to port 4774 and the converge 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
Network services
01 Security

Is port 4774 dangerous?

We have no specific security note for port 4774. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 4774

ServicePortTransportDescriptionReferenceUpdated
converge 4774 TCP Converge RPC - 2016-09-16
-4774-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4774, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4774'      # process listening on 4774
sudo lsof -nP -i :4774

macOS

sudo lsof -nP -i :4774

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4774 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4774
netstat -ano | findstr :4774

From another machine

nmap -p 4774 -sV <host>
nc -zv <host> 4774

Block it in the firewall

sudo ufw deny 4774/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4774" -Direction Inbound -LocalPort 4774 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4774 used for?

Port 4774 is assigned by IANA to converge (Converge RPC).

Is port 4774 TCP or UDP?

Port 4774 is registered for TCP.

Is it safe to open port 4774?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 4774 is open?

On Linux run "ss -ltnup 'sport = :4774'", on macOS "lsof -nP -i :4774", and on Windows "netstat -ano | findstr :4774" to see the local process. From another machine, "nmap -p 4774 <host>" shows whether it is reachable.

05 Related
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk

Latest vulnerability news

All news