Well-known · Cross-platform

902 VMware ESXi

TCP Unofficial
UDP Unofficial
SCTP —
DCCP —

What it is

VMware host agent / vCenter-to-ESXi management channel.

When / why

vSphere management traffic between vCenter and ESXi hosts.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
« 892 NFS mountd 953 BIND RNDC »

Port range

Well-known (0–1023). System port for a core service. On Unix-like systems, binding it requires superuser privileges.

Browse all ports →

Firewall rules for port 902

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 902

Allow TCP 902 (VMware ESXi). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 902

Allow UDP 902 (VMware ESXi). 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="902" protocol="tcp" accept'

Allow TCP 902 (VMware ESXi) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="902" protocol="udp" accept'

Allow UDP 902 (VMware ESXi) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 902 accept

Allow TCP 902 (VMware ESXi). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 902 accept

Allow UDP 902 (VMware ESXi). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 902 -j ACCEPT

Allow TCP 902 (VMware ESXi). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 902 -j ACCEPT

Allow UDP 902 (VMware ESXi). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-vmwareesxi-902 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 902

Inbound rule for 902 (VMware ESXi). 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=902,ToPort=902,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 902 (VMware ESXi). Replace <source-cidr> (e.g. 10.0.0.0/16).

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=udp,FromPort=902,ToPort=902,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 902 (VMware ESXi). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-vmwareesxi-902 --direction=INGRESS --action=ALLOW --rules=tcp:902,udp:902 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 902 (VMware ESXi). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow VMware ESXi 902/TCP" dir=in action=allow protocol=TCP localport=902 remoteip=<source>

Inbound TCP 902 (VMware ESXi). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow VMware ESXi 902/UDP" dir=in action=allow protocol=UDP localport=902 remoteip=<source>

Inbound UDP 902 (VMware ESXi). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow VMware ESXi 902/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 902 -RemoteAddress <source>

Inbound TCP 902 (VMware ESXi). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow VMware ESXi 902/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 902 -RemoteAddress <source>

Inbound UDP 902 (VMware ESXi). 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.