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// File transfer & sharing

Port 37601: Epipole File Transfer Protocol

Port 37601 is assigned by IANA to eftp (Epipole File Transfer Protocol).

37601

How eftp works

File transfer & sharing
client:376011/32/33/3eftp client:376011/32/33/3eftp

Files are sent over port 37601 in pieces and reassembled on the other side.

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
File transfer & sharing
01 Security

Is port 37601 dangerous?

We have no specific security note for port 37601. 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 37601

ServicePortTransportDescriptionReferenceUpdated
eftp 37601 TCP Epipole File Transfer Protocol - 2014-11-13
-37601-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 37601, and is it reachable?

Linux

sudo ss -ltnup 'sport = :37601'      # process listening on 37601
sudo lsof -nP -i :37601

macOS

sudo lsof -nP -i :37601

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 37601 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 37601
netstat -ano | findstr :37601

From another machine

nmap -p 37601 -sV <host>
nc -zv <host> 37601

Block it in the firewall

sudo ufw deny 37601/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 37601" -Direction Inbound -LocalPort 37601 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 37601 used for?

Port 37601 is assigned by IANA to eftp (Epipole File Transfer Protocol).

Is port 37601 TCP or UDP?

Port 37601 is registered for TCP.

Is it safe to open port 37601?

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 37601 is open?

On Linux run "ss -ltnup 'sport = :37601'", on macOS "lsof -nP -i :37601", and on Windows "netstat -ano | findstr :37601" to see the local process. From another machine, "nmap -p 37601 <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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