- Bind the service to localhost or a private network, never to a public address.
- Enable authentication, use per-application accounts and require TLS.
- Watch for exposed Docker ports: publish them on 127.0.0.1 only.
Port 7687: Bolt database connection
Port 7687 is assigned by IANA to bolt (Bolt database connection).
7687
How bolt works
Databases & cachesThe application sends a SQL query to the bolt server on port 7687, which returns rows from its tables.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Databases & caches
Is port 7687 dangerous?
We have no specific security note for port 7687. Its risk depends on the program actually listening on it. General advice for databases & caches services:
IANA registry entries for port 7687
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| bolt | 7687 | TCP | Bolt database connection | - | 2016-09-29 |
| - | 7687 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 7687, and is it reachable?
Linux
sudo ss -ltnup 'sport = :7687' # process listening on 7687
sudo lsof -nP -i :7687macOS
sudo lsof -nP -i :7687
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7687 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 7687 netstat -ano | findstr :7687
From another machine
nmap -p 7687 -sV <host> nc -zv <host> 7687
Block it in the firewall
sudo ufw deny 7687/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 7687" -Direction Inbound -LocalPort 7687 -Protocol TCP -Action Block # Windows
What is port 7687 used for?
Port 7687 is assigned by IANA to bolt (Bolt database connection).
Is port 7687 TCP or UDP?
Port 7687 is registered for TCP.
Is it safe to open port 7687?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Bind the service to localhost or a private network, never to a public address.
How do I check if port 7687 is open?
On Linux run "ss -ltnup 'sport = :7687'", on macOS "lsof -nP -i :7687", and on Windows "netstat -ano | findstr :7687" to see the local process. From another machine, "nmap -p 7687 <host>" shows whether it is reachable.
Other databases & caches ports
:3306 MySQL / MariaDB tcp · udp · high risk :1433 Microsoft SQL Server tcp · udp · high risk :5432 PostgreSQL tcp · udp · high risk :6379 Redis tcp · critical risk :27017 MongoDB tcp · critical risk :9200 Elasticsearch tcp · udp · critical risk :1521 Oracle Database tcp · udp · high risk :11211 Memcached tcp · udp · high risk