HTTPfy

Port 1849 (alpha-sms)

IANA assigns port 1849 to alpha-sms: ALPHA-SMS.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
alpha-sms TCP ALPHA-SMS Benjamin Grimm -
alpha-sms UDP ALPHA-SMS Benjamin Grimm -

Check what is listening on port 1849

Linux: is anything listening on TCP 1849?
sudo ss -tlnp 'sport = :1849'
Linux: UDP 1849
sudo ss -ulnp 'sport = :1849'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1849
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1849 '
Windows (Command Prompt)
netstat -ano | findstr :1849
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1849 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1849
From Windows
Test-NetConnection HOST -Port 1849
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1849

Block port 1849 in the firewall

ufw
sudo ufw deny 1849/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1849 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1849 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1849' -Direction Inbound -Protocol TCP -LocalPort 1849 -Action Block
ufw
sudo ufw deny 1849/udp
iptables
sudo iptables -A INPUT -p udp --dport 1849 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1849 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1849' -Direction Inbound -Protocol UDP -LocalPort 1849 -Action Block

Related ports

1847slp-notify1848fjdocdist1850gsi1851ctcd

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