Dynamic · Cross-platform

51515 Kopia

TCP Unofficial
UDP
SCTP
DCCP

What it is

Kopia backup server.

When / why

Self-hosted backups.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP Not applicable for this transport.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

Port range

Dynamic / private (49152–65535). Cannot be IANA-registered; used for ephemeral allocation and custom services.

Browse all ports →

Firewall rules for port 51515

Copy-ready inbound rules for the active transports. Replace every <source> placeholder with the specific host, subnet, or CIDR that should reach this port.

ufw

sudo ufw allow proto tcp from <source> to any port 51515

Allow TCP 51515 (Kopia). Replace <source> with the network/host that should reach it.

firewalld

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="51515" protocol="tcp" accept'

Allow TCP 51515 (Kopia) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 51515 accept

Allow TCP 51515 (Kopia). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 51515 -j ACCEPT

Allow TCP 51515 (Kopia). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-kopia-51515 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 51515

Inbound rule for 51515 (Kopia). Set <source> to a CIDR; lower priority number = higher precedence.

AWS Security Group

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=tcp,FromPort=51515,ToPort=51515,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 51515 (Kopia). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-kopia-51515 --direction=INGRESS --action=ALLOW --rules=tcp:51515 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 51515 (Kopia). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Kopia 51515/TCP" dir=in action=allow protocol=TCP localport=51515 remoteip=<source>

Inbound TCP 51515 (Kopia). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Kopia 51515/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 51515 -RemoteAddress <source>

Inbound TCP 51515 (Kopia). Replace <source> with a host or subnet.

Rules are generated only for transports marked active for this port. They default to an inbound allow with an explicit source placeholder — never any. Review direction, scope, and rule precedence before applying in production.