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Port 2774 (rbakcup2)

IANA assigns port 2774 to rbakcup2: RBackup Remote Backup.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rbakcup2 TCP RBackup Remote Backup Rob Cosgrove -
rbakcup2 UDP RBackup Remote Backup Rob Cosgrove -

Check what is listening on port 2774

Linux: is anything listening on TCP 2774?
sudo ss -tlnp 'sport = :2774'
Linux: UDP 2774
sudo ss -ulnp 'sport = :2774'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2774
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2774 '
Windows (Command Prompt)
netstat -ano | findstr :2774
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2774 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2774
From Windows
Test-NetConnection HOST -Port 2774
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2774

Block port 2774 in the firewall

ufw
sudo ufw deny 2774/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2774 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2774 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2774' -Direction Inbound -Protocol TCP -LocalPort 2774 -Action Block
ufw
sudo ufw deny 2774/udp
iptables
sudo iptables -A INPUT -p udp --dport 2774 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2774 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2774' -Direction Inbound -Protocol UDP -LocalPort 2774 -Action Block

Related ports

2772auris2773rbakcup12775smpp2776ridgeway1

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