Registered · Linux/Unix

25826 collectd

TCP Unofficial
UDP Unofficial
SCTP
DCCP

What it is

collectd metrics network plugin.

When / why

System metrics shipping (UDP).

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.

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 25826

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 25826

Allow TCP 25826 (collectd). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 25826

Allow UDP 25826 (collectd). 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="25826" protocol="tcp" accept'

Allow TCP 25826 (collectd) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="25826" protocol="udp" accept'

Allow UDP 25826 (collectd) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 25826 accept

Allow TCP 25826 (collectd). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 25826 accept

Allow UDP 25826 (collectd). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 25826 -j ACCEPT

Allow TCP 25826 (collectd). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 25826 -j ACCEPT

Allow UDP 25826 (collectd). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-collectd-25826 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 25826

Inbound rule for 25826 (collectd). 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=25826,ToPort=25826,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 25826 (collectd). 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=25826,ToPort=25826,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 25826 (collectd). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-collectd-25826 --direction=INGRESS --action=ALLOW --rules=tcp:25826,udp:25826 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 25826 (collectd). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow collectd 25826/TCP" dir=in action=allow protocol=TCP localport=25826 remoteip=<source>

Inbound TCP 25826 (collectd). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow collectd 25826/UDP" dir=in action=allow protocol=UDP localport=25826 remoteip=<source>

Inbound UDP 25826 (collectd). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow collectd 25826/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 25826 -RemoteAddress <source>

Inbound TCP 25826 (collectd). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow collectd 25826/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 25826 -RemoteAddress <source>

Inbound UDP 25826 (collectd). 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.