Registered · Cross-platform

11371 OpenPGP keyserver

TCP Yes
UDP
SCTP
DCCP

What it is

HKP key-server protocol.

When / why

PGP public-key distribution.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and 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

Registered (1024–49151). Assigned by IANA on request; usable without elevated privileges on most systems.

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Firewall rules for port 11371

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 11371

Allow TCP 11371 (OpenPGP keyserver). 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="11371" protocol="tcp" accept'

Allow TCP 11371 (OpenPGP keyserver) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 11371 accept

Allow TCP 11371 (OpenPGP keyserver). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 11371 -j ACCEPT

Allow TCP 11371 (OpenPGP keyserver). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-openpgpkeyserver-11371 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 11371

Inbound rule for 11371 (OpenPGP keyserver). 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=11371,ToPort=11371,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 11371 (OpenPGP keyserver). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-openpgpkeyserver-11371 --direction=INGRESS --action=ALLOW --rules=tcp:11371 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 11371 (OpenPGP keyserver). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow OpenPGP keyserver 11371/TCP" dir=in action=allow protocol=TCP localport=11371 remoteip=<source>

Inbound TCP 11371 (OpenPGP keyserver). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow OpenPGP keyserver 11371/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 11371 -RemoteAddress <source>

Inbound TCP 11371 (OpenPGP keyserver). 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.