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Port 2702 (sms-xfer)

IANA assigns port 2702 to sms-xfer: SMS XFER.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sms-xfer TCP SMS XFER - -
sms-xfer UDP SMS XFER - -

Check what is listening on port 2702

Linux: is anything listening on TCP 2702?
sudo ss -tlnp 'sport = :2702'
Linux: UDP 2702
sudo ss -ulnp 'sport = :2702'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2702
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2702 '
Windows (Command Prompt)
netstat -ano | findstr :2702
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2702 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2702
From Windows
Test-NetConnection HOST -Port 2702
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2702

Block port 2702 in the firewall

ufw
sudo ufw deny 2702/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2702 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2702 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2702' -Direction Inbound -Protocol TCP -LocalPort 2702 -Action Block
ufw
sudo ufw deny 2702/udp
iptables
sudo iptables -A INPUT -p udp --dport 2702 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2702 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2702' -Direction Inbound -Protocol UDP -LocalPort 2702 -Action Block

Related ports

2700tqdata2701sms-rcinfo2703sms-chat2704sms-remctrl

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