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Port 2752 (rsisysaccess)

IANA assigns port 2752 to rsisysaccess: RSISYS ACCESS.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rsisysaccess TCP RSISYS ACCESS Christophe Besant -
rsisysaccess UDP RSISYS ACCESS Christophe Besant -

Check what is listening on port 2752

Linux: is anything listening on TCP 2752?
sudo ss -tlnp 'sport = :2752'
Linux: UDP 2752
sudo ss -ulnp 'sport = :2752'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2752
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2752 '
Windows (Command Prompt)
netstat -ano | findstr :2752
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2752 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2752
From Windows
Test-NetConnection HOST -Port 2752
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2752

Block port 2752 in the firewall

ufw
sudo ufw deny 2752/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2752 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2752 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2752' -Direction Inbound -Protocol TCP -LocalPort 2752 -Action Block
ufw
sudo ufw deny 2752/udp
iptables
sudo iptables -A INPUT -p udp --dport 2752 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2752 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2752' -Direction Inbound -Protocol UDP -LocalPort 2752 -Action Block

Related ports

2745urbisnet2746cpudpencap2753de-spot2754apollo-cc

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