Port 7009 AFS3-RMTSYS
Port 7009 is the IANA-assigned afs3-rmtsys port for remote cache manager service (TCP / UDP).
What is port 7009 used for?
Port 7009 is assigned to afs3-rmtsys and uses TCP / UDP. The IANA registry describes the service as “remote cache manager service”. It sits in the registered range, the block used by databases, application servers and developer tooling. Port conflicts here are common when several local services start at once.
Ports are the transport-layer address a service listens on. A client that wants to reach afs3-rmtsys connects to port 7009. A TCP connection is refused when nothing is listening, while a UDP request simply goes unanswered. That is why a port conflict appears whenever two processes try to bind the same number.
Use the commands below to confirm whether port 7009 is actually in use before you change firewall rules. Blocking the port stops new inbound traffic at the firewall, but it does not stop a local process from listening, and it does not remove the service from the machine.
Browse all Caching and in-memory stores ports
Source: IANA Service Name and Transport Protocol Port Number Registry.
Check and block port 7009
Copy-ready commands for the protocols assigned to this port. Run the check first, then block only what should not be reachable.
Check on Linux
sudo ss -tlpn 'sport = :7009'
sudo ss -ulpn 'sport = :7009'Check on Windows
Get-NetTCPConnection -LocalPort 7009 -State Listen -ErrorAction SilentlyContinue
Get-NetUDPEndpoint -LocalPort 7009 -ErrorAction SilentlyContinueBlock with UFW
sudo ufw deny 7009/tcp
sudo ufw deny 7009/udpBlock with iptables
sudo iptables -A INPUT -p tcp --dport 7009 -j DROP
sudo iptables -A INPUT -p udp --dport 7009 -j DROPThese commands are examples for a typical host. Check the listener before you change firewall rules, and persist iptables rules with iptables-save or netfilter-persistent. On Windows, use Windows Defender Firewall or New-NetFirewallRule for persistent blocks. The iptables rules here cover IPv4; mirror them with ip6tables if IPv6 is enabled.
Is port 7009 safe to expose?
This port is not on our curated list of services with a widely exploited profile. Exposure is only safe when the listening service is intended, patched and protected by a firewall. Keep the listening service patched and remove it if unused. A default-deny firewall policy with explicit allow rules is still the safest baseline.
Where port 7009 is usually used
Most traffic on port 7009 falls into these scenarios. The demo below is a safe way to confirm the listener before you change anything.
- Session storage, rate limiting and hot-key caching in front of a slower database.
- Several application instances sharing counters or job state on port 7009.
- Local development stacks that run the cache in a container.
Ping the cache
Confirm the listener is reachable before you debug client configuration or authentication.
nc -vz 127.0.0.1 7009Common problems with port 7009
Connection refused or timed out
Refused usually means the host is reachable but nothing is listening on port 7009. A timeout more often means a firewall drop, a wrong host or a service bound to a different interface.
Port already in use
Find the process holding the port with sudo ss -tlpn 'sport = :7009' or sudo lsof -i :7009. Stop that process or configure it to bind another port; killing it without identifying it can take down a production service.
Firewall rule did not survive a reboot
UFW and Windows Firewall keep rules across restarts. Raw iptables rules do not: save them with iptables-save or the netfilter-persistent package, and re-apply after upgrades that reset the ruleset.
The port is blocked but still reachable
A firewall rule filters inbound traffic; it does not close the listener. Confirm with the check command above and bind the service to 127.0.0.1 when only local clients need it.
Port 7009 at a glance
| Port number | 7009 |
|---|---|
| Service name | afs3-rmtsys |
| Transport protocol | TCP / UDP |
| Category | Caching and in-memory stores |
| Range | Registered port (1024–10000) |
| Risk level | Standard/Low |
| Registered assignee | Not listed |
| Registry description | remote cache manager service |
| Source | IANA Service Name and Transport Protocol Port Number Registry |
Frequently asked questions
What is port 7009 used for?
Port 7009 (AFS3-RMTSYS) uses TCP / UDP. remote cache manager service.
How do I check if port 7009 is open?
On Linux run `sudo ss -tlpn 'sport = :7009'` and `sudo ss -ulpn 'sport = :7009'`. On Windows run `Get-NetTCPConnection -LocalPort 7009 -State Listen -ErrorAction SilentlyContinue` and `Get-NetUDPEndpoint -LocalPort 7009 -ErrorAction SilentlyContinue` in PowerShell. If the port is open, the output shows a process listening on port 7009; empty output usually means nothing is bound to it.
How do I block port 7009?
With UFW run `sudo ufw deny 7009/tcp` and `sudo ufw deny 7009/udp`. With iptables run `sudo iptables -A INPUT -p tcp --dport 7009 -j DROP` and `sudo iptables -A INPUT -p udp --dport 7009 -j DROP`. Persist the iptables rules with your distribution's netfilter-persistent or iptables-save tooling so they survive a reboot.
Is port 7009 safe to expose?
This port is not on our curated list of services with a widely exploited profile. Exposure is only safe when the listening service is intended, patched and protected by a firewall. Nevertheless, keep the listening service patched and remove it if unused. A default-deny firewall policy with explicit allow rules is still the safest baseline.
Related ports
- Port 7006 · afs3-errorserror interpretation service
- Port 7010 · ups-onlinetonlinet uninterruptable power supplies
- Port 7001 · afs3-callbackcallbacks to cache managers
- Port 8276 · ms-mccMicrosoft Connected Cache
- Port 6379 · redisAn advanced key-value cache and store
- Port 11211 · memcacheMemory cache service
Primary data: IANA Service Name and Transport Protocol Port Number Registry.
Last reviewed 2026-10-30 · Methodology · About · Privacy