Port 8102 KZ-MIGR
Port 8102 is the IANA-assigned kz-migr port for Oracle Kernel zones migration server (TCP).
What is port 8102 used for?
Port 8102 is assigned to kz-migr and uses TCP. The IANA registry describes the service as “Oracle Kernel zones migration server”. 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 kz-migr connects to port 8102. If nothing is listening, the connection is refused. That is why a port conflict appears whenever two processes try to bind the same number.
Use the commands below to confirm whether port 8102 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.
Source: IANA Service Name and Transport Protocol Port Number Registry. Registered assignee: [Oracle_4].
Check and block port 8102
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 = :8102'Check on Windows
Get-NetTCPConnection -LocalPort 8102 -State Listen -ErrorAction SilentlyContinueBlock with UFW
sudo ufw deny 8102/tcpBlock with iptables
sudo iptables -A INPUT -p tcp --dport 8102 -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 8102 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 8102 is usually used
Most traffic on port 8102 falls into these scenarios. The demo below is a safe way to confirm the listener before you change anything.
- Application servers opening pooled connections to the database on port 8102.
- Migrations, backups and reporting jobs run from a trusted bastion host.
- Local Docker or test environments that publish the database on the host.
Open a test connection
Probe the TCP listener before you debug credentials or driver settings.
nc -vz 127.0.0.1 8102Common problems with port 8102
Connection refused or timed out
Refused usually means the host is reachable but nothing is listening on port 8102. 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 = :8102' or sudo lsof -i :8102. 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 8102 at a glance
| Port number | 8102 |
|---|---|
| Service name | kz-migr |
| Transport protocol | TCP |
| Category | Databases |
| Range | Registered port (1024–10000) |
| Risk level | Standard/Low |
| Registered assignee | [Oracle_4] |
| Registry description | Oracle Kernel zones migration server |
| Source | IANA Service Name and Transport Protocol Port Number Registry |
Frequently asked questions
What is port 8102 used for?
Port 8102 (KZ-MIGR) uses TCP. Oracle Kernel zones migration server.
How do I check if port 8102 is open?
On Linux run `sudo ss -tlpn 'sport = :8102'`. On Windows run `Get-NetTCPConnection -LocalPort 8102 -State Listen -ErrorAction SilentlyContinue` in PowerShell. If the port is open, the output shows a process listening on port 8102; empty output usually means nothing is bound to it.
How do I block port 8102?
With UFW run `sudo ufw deny 8102/tcp`. With iptables run `sudo iptables -A INPUT -p tcp --dport 8102 -j DROP`. Persist the iptables rules with your distribution's netfilter-persistent or iptables-save tooling so they survive a reboot.
Is port 8102 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 8101 · ldoms-migrLogical Domains Migration
- Port 8111 · skynetflowSkynetflow network services
- Port 8086 · d-s-nDistributed SCADA Networking Rendezvous Port
- Port 8997 · oracle-ms-ensOracle Messaging Server Event Notification Service
- Port 8070 · ucs-iscOracle Unified Communication Suite's Indexed Search Converter
- Port 9042 · CassandraApache Cassandra native client protocol port (community convention;…
Primary data: IANA Service Name and Transport Protocol Port Number Registry.
Last reviewed 2026-10-30 · Methodology · About · Privacy