HTTPfy

Port 1234 (search-agent)

IANA assigns port 1234 to search-agent: Infoseek Search Agent.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
search-agent TCP Infoseek Search Agent Jackie Wu -
search-agent UDP Infoseek Search Agent Jackie Wu -

Check what is listening on port 1234

Linux: is anything listening on TCP 1234?
sudo ss -tlnp 'sport = :1234'
Linux: UDP 1234
sudo ss -ulnp 'sport = :1234'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1234
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1234 '
Windows (Command Prompt)
netstat -ano | findstr :1234
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1234 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1234
From Windows
Test-NetConnection HOST -Port 1234
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1234

Block port 1234 in the firewall

ufw
sudo ufw deny 1234/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1234 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1234 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1234' -Direction Inbound -Protocol TCP -LocalPort 1234 -Action Block
ufw
sudo ufw deny 1234/udp
iptables
sudo iptables -A INPUT -p udp --dport 1234 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1234 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1234' -Direction Inbound -Protocol UDP -LocalPort 1234 -Action Block

Related ports

1232first-defense1233univ-appserver1235mosaicsyssvc11236bvcontrol

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