PORT 26257 / TCPDatabase & CacheExposure Risk: Critical
Port 26257: CockroachDB SQL — CockroachDB Distributed SQL Wire Protocol
PostgreSQL-compatible SQL wire protocol port used by CockroachDB nodes.
Default Service
CockroachDB SQL
Process: cockroach
Transport Protocol
TCP
IANA Registered Port 26257
Docker Port Flag
-p 26257:26257
Container to Host Mapping
How to Check & Kill Process on Port 26257 (EADDRINUSE Fix)
macOS & Linux (lsof / kill)
# Find process using port 26257 sudo lsof -i :26257 # Instantly kill process on port 26257 lsof -ti:26257 | xargs kill -9
Windows (PowerShell & CMD)
# Find PID listening on port 26257 netstat -ano | findstr :26257 # Force kill by PID taskkill /PID <PID_NUMBER> /F
Cross-Platform Node.js One-Liner
# Kill port 26257 via npx npx kill-port 26257 # Or diagnose via Castov CLI npx castov fix "EADDRINUSE :::26257"
Linux Firewall (UFW) & Connectivity Test
# Test if port 26257 is reachable nc -zv localhost 26257 # Allow or deny port 26257 in UFW sudo ufw allow 26257/tcp
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Frequently Asked Questions about Port 26257
What is Port 26257 used for?
Port 26257 is the standard network port for CockroachDB SQL (CockroachDB Distributed SQL Wire Protocol) operating over TCP. The typical system daemon or process is cockroach.
How do I kill a process running on Port 26257 (EADDRINUSE)?
On macOS and Linux, run: lsof -ti:26257 | xargs kill -9 (or npx kill-port 26257). On Windows PowerShell/CMD, run: netstat -ano | findstr :26257 and then taskkill /PID <PID> /F.
Is it safe to expose Port 26257 to the internet?
Port 26257 has a Critical security risk profile. PostgreSQL-compatible SQL wire protocol port used by CockroachDB nodes.