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Port 2152 (gtp-user)

IANA assigns port 2152 to gtp-user: GTP-User Plane (3GPP).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gtp-user TCP GTP-User Plane (3GPP) Alessio Casati -
gtp-user UDP GTP-User Plane (3GPP) Alessio Casati -

Check what is listening on port 2152

Linux: is anything listening on TCP 2152?
sudo ss -tlnp 'sport = :2152'
Linux: UDP 2152
sudo ss -ulnp 'sport = :2152'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2152
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2152 '
Windows (Command Prompt)
netstat -ano | findstr :2152
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2152 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2152
From Windows
Test-NetConnection HOST -Port 2152
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2152

Block port 2152 in the firewall

ufw
sudo ufw deny 2152/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2152 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2152 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2152' -Direction Inbound -Protocol TCP -LocalPort 2152 -Action Block
ufw
sudo ufw deny 2152/udp
iptables
sudo iptables -A INPUT -p udp --dport 2152 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2152 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2152' -Direction Inbound -Protocol UDP -LocalPort 2152 -Action Block

Related ports

2150dynamic3d2151docent2153ctlptc2154stdptc

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