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Port 268 (td-replica)

IANA assigns port 268 to td-replica: Tobit David Replica.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
td-replica TCP Tobit David Replica Franz Josef Leuders -
td-replica UDP Tobit David Replica Franz Josef Leuders -

Check what is listening on port 268

Linux: is anything listening on TCP 268?
sudo ss -tlnp 'sport = :268'
Linux: UDP 268
sudo ss -ulnp 'sport = :268'
Linux / macOS: which process owns the port
sudo lsof -nP -i :268
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':268 '
Windows (Command Prompt)
netstat -ano | findstr :268
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 268 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 268
From Windows
Test-NetConnection HOST -Port 268
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 268

Block port 268 in the firewall

ufw
sudo ufw deny 268/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 268 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 268 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 268' -Direction Inbound -Protocol TCP -LocalPort 268 -Action Block
ufw
sudo ufw deny 268/udp
iptables
sudo iptables -A INPUT -p udp --dport 268 -j DROP
nftables
sudo nft add rule inet filter input udp dport 268 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 268' -Direction Inbound -Protocol UDP -LocalPort 268 -Action Block

Related ports

266sst267td-service269manet270gist

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