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Port 1311 (rxmon)

IANA assigns port 1311 to rxmon: RxMon.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rxmon TCP RxMon Javier Jiminez -
rxmon UDP RxMon Javier Jiminez -

Check what is listening on port 1311

Linux: is anything listening on TCP 1311?
sudo ss -tlnp 'sport = :1311'
Linux: UDP 1311
sudo ss -ulnp 'sport = :1311'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1311
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1311 '
Windows (Command Prompt)
netstat -ano | findstr :1311
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1311 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1311
From Windows
Test-NetConnection HOST -Port 1311
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1311

Block port 1311 in the firewall

ufw
sudo ufw deny 1311/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1311 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1311 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1311' -Direction Inbound -Protocol TCP -LocalPort 1311 -Action Block
ufw
sudo ufw deny 1311/udp
iptables
sudo iptables -A INPUT -p udp --dport 1311 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1311 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1311' -Direction Inbound -Protocol UDP -LocalPort 1311 -Action Block

Related ports

1309jtag-server1310husky1312sti-envision1313bmc-patroldb, bmc_patroldb

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.