Registered · Linux/Unix

4045 NFS lockd (Solaris)

TCP Unofficial
UDP Unofficial
SCTP —
DCCP —

What it is

Solaris NFS lock daemon/manager.

When / why

NFS file locking on Solaris.

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.
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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 4045

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 4045

Allow TCP 4045 (NFS lockd (Solaris)). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 4045

Allow UDP 4045 (NFS lockd (Solaris)). 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="4045" protocol="tcp" accept'

Allow TCP 4045 (NFS lockd (Solaris)) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="4045" protocol="udp" accept'

Allow UDP 4045 (NFS lockd (Solaris)) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 4045 accept

Allow TCP 4045 (NFS lockd (Solaris)). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 4045 accept

Allow UDP 4045 (NFS lockd (Solaris)). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 4045 -j ACCEPT

Allow TCP 4045 (NFS lockd (Solaris)). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 4045 -j ACCEPT

Allow UDP 4045 (NFS lockd (Solaris)). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-nfslockdsolaris-4045 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 4045

Inbound rule for 4045 (NFS lockd (Solaris)). 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=4045,ToPort=4045,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 4045 (NFS lockd (Solaris)). 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=4045,ToPort=4045,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 4045 (NFS lockd (Solaris)). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-nfslockdsolaris-4045 --direction=INGRESS --action=ALLOW --rules=tcp:4045,udp:4045 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 4045 (NFS lockd (Solaris)). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow NFS lockd (Solaris) 4045/TCP" dir=in action=allow protocol=TCP localport=4045 remoteip=<source>

Inbound TCP 4045 (NFS lockd (Solaris)). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow NFS lockd (Solaris) 4045/UDP" dir=in action=allow protocol=UDP localport=4045 remoteip=<source>

Inbound UDP 4045 (NFS lockd (Solaris)). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow NFS lockd (Solaris) 4045/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 4045 -RemoteAddress <source>

Inbound TCP 4045 (NFS lockd (Solaris)). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow NFS lockd (Solaris) 4045/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 4045 -RemoteAddress <source>

Inbound UDP 4045 (NFS lockd (Solaris)). 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.