Port 11211: Memcached
Port 11211 is the default port for Memcached, an in-memory key-value cache used to speed up applications by avoiding repeated database queries. It has no authentication in its classic protocol, so it should never be reachable from the public internet.
| Port number | 11211 |
|---|---|
| Service | Memcached |
| Protocol | TCP/UDP |
| Category | Databases |
| Default encryption | No |
Frequently asked questions
What is port 11211 used for?
Port 11211 is the default port for Memcached, an in-memory key-value cache used to speed up applications by avoiding repeated database queries. It has no authentication in its classic protocol, so it should never be reachable from the public internet.
Is port 11211 TCP or UDP?
Port 11211 (Memcached) uses TCP/UDP.
Is port 11211 secure?
Port 11211 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 11211 on my firewall?
Only if you specifically need Memcached. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.