HTTPfy

Port 1103 (adobeserver-2)

IANA assigns port 1103 to adobeserver-2: ADOBE SERVER 2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
adobeserver-2 TCP ADOBE SERVER 2 Frank Soetebeer -
adobeserver-2 UDP ADOBE SERVER 2 Frank Soetebeer -

Check what is listening on port 1103

Linux: is anything listening on TCP 1103?
sudo ss -tlnp 'sport = :1103'
Linux: UDP 1103
sudo ss -ulnp 'sport = :1103'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1103
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1103 '
Windows (Command Prompt)
netstat -ano | findstr :1103
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1103 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1103
From Windows
Test-NetConnection HOST -Port 1103
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1103

Block port 1103 in the firewall

ufw
sudo ufw deny 1103/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1103 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1103 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1103' -Direction Inbound -Protocol TCP -LocalPort 1103 -Action Block
ufw
sudo ufw deny 1103/udp
iptables
sudo iptables -A INPUT -p udp --dport 1103 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1103 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1103' -Direction Inbound -Protocol UDP -LocalPort 1103 -Action Block

Related ports

1101pt2-discover1102adobeserver-11104xrl1105ftranhc

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