Port 5196 AMPL-TABLEPROXY
Port 5196 is the IANA-assigned ampl-tableproxy port for The protocol is used by two programs that exchange "table" data used in the AMPL modeling language (TCP).
What is port 5196 used for?
Port 5196 is assigned to ampl-tableproxy and uses TCP. The IANA registry describes the service as “The protocol is used by two programs that exchange "table" data used in the AMPL modeling language”. 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 ampl-tableproxy connects to port 5196. 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 5196 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 Networking and proxies ports
Source: IANA Service Name and Transport Protocol Port Number Registry. Registered assignee: [AMPL_Optimization].
Check and block port 5196
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 = :5196'Check on Windows
Get-NetTCPConnection -LocalPort 5196 -State Listen -ErrorAction SilentlyContinueBlock with UFW
sudo ufw deny 5196/tcpBlock with iptables
sudo iptables -A INPUT -p tcp --dport 5196 -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 5196 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 5196 is usually used
Most traffic on port 5196 falls into these scenarios. The demo below is a safe way to confirm the listener before you change anything.
- Routers, switches and proxies exchanging routing or session information.
- Clients sending traffic through a forward or reverse proxy on port 5196.
- Troubleshooting path selection, NAT or proxy rules during an outage.
Probe the network service
Check reachability from a host on the same path before you inspect device configuration.
nc -vz 127.0.0.1 5196Common problems with port 5196
Connection refused or timed out
Refused usually means the host is reachable but nothing is listening on port 5196. 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 = :5196' or sudo lsof -i :5196. 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 5196 at a glance
| Port number | 5196 |
|---|---|
| Service name | ampl-tableproxy |
| Transport protocol | TCP |
| Category | Networking and proxies |
| Range | Registered port (1024–10000) |
| Risk level | Standard/Low |
| Registered assignee | [AMPL_Optimization] |
| Registry description | The protocol is used by two programs that exchange "table" data used in the AMPL modeling language |
| Source | IANA Service Name and Transport Protocol Port Number Registry |
Frequently asked questions
What is port 5196 used for?
Port 5196 (AMPL-TABLEPROXY) uses TCP. The protocol is used by two programs that exchange "table" data used in the AMPL modeling language.
How do I check if port 5196 is open?
On Linux run `sudo ss -tlpn 'sport = :5196'`. On Windows run `Get-NetTCPConnection -LocalPort 5196 -State Listen -ErrorAction SilentlyContinue` in PowerShell. If the port is open, the output shows a process listening on port 5196; empty output usually means nothing is bound to it.
How do I block port 5196?
With UFW run `sudo ufw deny 5196/tcp`. With iptables run `sudo iptables -A INPUT -p tcp --dport 5196 -j DROP`. Persist the iptables rules with your distribution's netfilter-persistent or iptables-save tooling so they survive a reboot.
Is port 5196 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.
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Primary data: IANA Service Name and Transport Protocol Port Number Registry.
Last reviewed 2026-10-30 · Methodology · About · Privacy