Registered · Cross-platform

16261 Project Zomboid

TCP Unofficial
UDP —
SCTP —
DCCP —

What it is

Project Zomboid multiplayer.

When / why

Game server hosting.

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.
« 15672 RabbitMQ management 16379 Redis Cluster bus »

Port range

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

Browse all ports →

Firewall rules for port 16261

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 16261

Allow TCP 16261 (Project Zomboid). 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="16261" protocol="tcp" accept'

Allow TCP 16261 (Project Zomboid) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 16261 accept

Allow TCP 16261 (Project Zomboid). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 16261 -j ACCEPT

Allow TCP 16261 (Project Zomboid). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-projectzomboid-16261 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 16261

Inbound rule for 16261 (Project Zomboid). 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=16261,ToPort=16261,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 16261 (Project Zomboid). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-projectzomboid-16261 --direction=INGRESS --action=ALLOW --rules=tcp:16261 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 16261 (Project Zomboid). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Project Zomboid 16261/TCP" dir=in action=allow protocol=TCP localport=16261 remoteip=<source>

Inbound TCP 16261 (Project Zomboid). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Project Zomboid 16261/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 16261 -RemoteAddress <source>

Inbound TCP 16261 (Project Zomboid). 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.