Port 4999HFSQL Client/Server Database Engine Manager

Port 4999 is used by PC SOFT's HFSQL Client/Server Database Engine Manager.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

also known as hfcs-manager, HFSQL Manager

Technical Details

what runs on :4999

This is a proprietary PC SOFT HFSQL management service rather than HTTP or a standard SQL wire protocol. IANA registers it for both TCP and UDP; deployments may expose one or both transports depending on the HFSQL Server version and enabled functions. The protocol uses implementation-specific binary messaging and framing, with no standard text handshake; port 4900 is commonly associated with regular HFSQL Client/Server connections. HFSQL can be configured for protected connections, but port 4999 traffic is not encrypted by default in a normal deployment.

Security Information

exposure of :4999

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

databases averages 3.7 across 141 ports — this one sits 3.3 above.

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

An Internet-exposed HFSQL management endpoint invites service fingerprinting and password-guessing or protocol-probing attempts, and a compromised or weakly authenticated server could expose or modify application data. It should normally be restricted to application hosts and administration networks with firewall rules or VPN access; use the product's encryption and current security updates where remote access is required.

Record

iana registry entry

port: :4999
service: HFSQL Client/Server Database Engine Manager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Databases
usage: Port 4999 is associated with PC SOFT's HFSQL Client/Server database engine management functions, typically alongside WinDev, WebDev, or WinDev Mobile applications. Engineers may also encounter HFSQL's primary client/database connection service on port 4900, so an open 4999 does not necessarily represent ordinary application query traffic.
lookups: 0rank 993
added: 2026-09-14
updated: 2026-09-22
references: IANA service name registry — port 4999

Something wrong?

This record is maintained by the engineers who use port 4999. 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 2026-09-22.

01edit any field on a page of its own
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edit this record →back to the registry

Related Ports

all 141 in databases →

the 8 most looked-up other ports in databases — 141 ports carry that label.

port	service	proto	category	risk	views
:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:9001	ETL Service Manager	TCPUDP	Databases	caution	28.6k
:2484	Oracle SSL Listener	TCPUDPtls	Security	caution	25.0k
:5495	Applix TM1 Admin	TCP	Databases	caution	24.8k
:591	FileMaker Web Sharing	TCP	Web Services	caution	23.1k
:1521	Oracle TNS Listener	TCP	Security	caution	19.6k
:21001	AMLFilter Admin	TCP	Security	caution	19.2k
:18206	Audition FAM DB	TCPUDP	Databases	caution	19.1k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :4999HFSQL Client/Server Database Engine Manager

Technical Details

Security Information

Related Ports

Port 4999HFSQL Client/Server Database Engine Manager