HTTPfy

Port 2545 (sis-emt)

IANA assigns port 2545 to sis-emt.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sis-emt TCP sis-emt Bill Crawford -
sis-emt UDP sis-emt Bill Crawford -

Check what is listening on port 2545

Linux: is anything listening on TCP 2545?
sudo ss -tlnp 'sport = :2545'
Linux: UDP 2545
sudo ss -ulnp 'sport = :2545'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2545
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2545 '
Windows (Command Prompt)
netstat -ano | findstr :2545
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2545 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2545
From Windows
Test-NetConnection HOST -Port 2545
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2545

Block port 2545 in the firewall

ufw
sudo ufw deny 2545/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2545 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2545 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2545' -Direction Inbound -Protocol TCP -LocalPort 2545 -Action Block
ufw
sudo ufw deny 2545/udp
iptables
sudo iptables -A INPUT -p udp --dport 2545 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2545 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2545' -Direction Inbound -Protocol UDP -LocalPort 2545 -Action Block

Related ports

2543reftek2544novell-zen2546vytalvaultbrtp2547vytalvaultvsmp

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