Port 7001Andrew File System callback

AFS cache managers listen here for file-server callbacks that invalidate or update cached data.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 4/10
lookups: 0

also known as afs3-callback, AFS callback, OpenAFS callback

1 other service is registered on port 7001. compare all 2 →

Technical Details

what runs on :7001

The AFS cache manager exposes the callback RPC service on TCP and UDP port 7001. AFS file servers use the Rx remote-procedure-call protocol to contact this listener and revoke callback promises when files or directories change, causing the client to discard or refresh cached data. AFS deployments commonly use UDP-based Rx; the related standard ports include 7000 for the fileserver, 7002 for the protection server, and 7003 for the volume location server. Authentication and optional encryption are provided by AFS security mechanisms such as rxkad rather than by the callback port itself.

Security Information

exposure of :7001

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

file transfer averages 4.1 across 122 ports — this one sits 0.1 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

This listener is intended for communication with trusted AFS file servers and should not normally be exposed directly to the public internet. Restrict it with network filtering to the AFS cell's servers and use the deployment's authentication and encryption settings; an exposed service may disclose implementation details or provide an attack surface for AFS/Rx vulnerabilities, although the service is uncommon on internet hosts.

Record

iana registry entry

port: :7001
service: Andrew File System callback
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 4/10caution
category: File Transfer Network Services
usage: OpenAFS and other AFS clients listen on port 7001 for callbacks from AFS file servers. Engineers typically encounter it on AFS client hosts, alongside the AFS fileserver and other services in the 7000–7007 port range.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 7001

Something wrong?

This record is maintained by the engineers who use port 7001. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-08-21.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 122 in file transfer →

the 8 most looked-up other ports in file transfer — 122 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :7001Andrew File System callback

Technical Details

Security Information

Related Ports

Port 7001Andrew File System callback