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// File transfer & sharing

Port 6619: ODETTE-FTP over TLS/SSL

Port 6619 is assigned by IANA to odette-ftps (ODETTE-FTP over TLS/SSL).

6619

How odette-ftps works

File transfer & sharing
client:66191/32/33/3odette-ftps? client:66191/32/33/3odette-ftps?

Files are sent over port 6619 in pieces and reassembled on the other side. Everything is encrypted: someone on the path only sees unreadable bytes.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
EncryptedTLS or built-in crypto
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
File transfer & sharing
01 Security

Is port 6619 dangerous?

We have no specific security note for port 6619. Its risk depends on the program actually listening on it. General advice for file transfer & sharing services:

  • Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).
  • Disable anonymous access and restrict shares or exports to known hosts.
  • Never publish file sharing protocols to the Internet.
02 Registry

IANA registry entries for port 6619

ServicePortTransportDescriptionReferenceUpdated
odette-ftps 6619 TCP, UDP ODETTE-FTP over TLS/SSL RFC 5024 2006-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 6619, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6619'      # process listening on 6619
sudo lsof -nP -i :6619

macOS

sudo lsof -nP -i :6619

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6619 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6619
netstat -ano | findstr :6619

From another machine

nmap -p 6619 -sV <host>
sudo nmap -sU -p 6619 <host>
nc -zv <host> 6619

Block it in the firewall

sudo ufw deny 6619/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6619" -Direction Inbound -LocalPort 6619 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6619 used for?

Port 6619 is assigned by IANA to odette-ftps (ODETTE-FTP over TLS/SSL).

Is port 6619 TCP or UDP?

Port 6619 is registered for TCP and UDP.

Is it safe to open port 6619?

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. Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).

How do I check if port 6619 is open?

On Linux run "ss -ltnup 'sport = :6619'", on macOS "lsof -nP -i :6619", and on Windows "netstat -ano | findstr :6619" to see the local process. From another machine, "nmap -p 6619 <host>" shows whether it is reachable.

05 Related
:445 SMB tcp · udp · critical risk :21 FTP tcp · udp · sctp · high risk :139 NetBIOS Session tcp · udp · high risk :69 TFTP udp · tcp · high risk :2049 NFS tcp · udp · sctp · high risk :873 rsync tcp · udp · high risk :20 File Transfer [Default Data] tcp · udp · sctp :115 Simple File Transfer Protocol tcp · udp

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