HTTPfy

Port 2513 (citrixadmin)

IANA assigns port 2513 to citrixadmin: Citrix ADMIN.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
citrixadmin TCP Citrix ADMIN Myk Willis -
citrixadmin UDP Citrix ADMIN Myk Willis -

Check what is listening on port 2513

Linux: is anything listening on TCP 2513?
sudo ss -tlnp 'sport = :2513'
Linux: UDP 2513
sudo ss -ulnp 'sport = :2513'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2513
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2513 '
Windows (Command Prompt)
netstat -ano | findstr :2513
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2513 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2513
From Windows
Test-NetConnection HOST -Port 2513
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2513

Block port 2513 in the firewall

ufw
sudo ufw deny 2513/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2513 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2513 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2513' -Direction Inbound -Protocol TCP -LocalPort 2513 -Action Block
ufw
sudo ufw deny 2513/udp
iptables
sudo iptables -A INPUT -p udp --dport 2513 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2513 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2513' -Direction Inbound -Protocol UDP -LocalPort 2513 -Action Block

Related ports

2511metastorm2512citrixima2514facsys-ntp2515facsys-router

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