Registered · Cross-platform

1813 RADIUS accounting

TCP Yes
UDP Yes
SCTP —
DCCP —

What it is

Standard RADIUS accounting.

When / why

Session accounting records to the RADIUS server.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Yes Assigned by IANA and standardized, specified, or widely used on this port.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
« 1812 RADIUS authentication 1863 MSNP »

Port range

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

Browse all ports →

Firewall rules for port 1813

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 1813

Allow TCP 1813 (RADIUS accounting). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 1813

Allow UDP 1813 (RADIUS accounting). 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="1813" protocol="tcp" accept'

Allow TCP 1813 (RADIUS accounting) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="1813" protocol="udp" accept'

Allow UDP 1813 (RADIUS accounting) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 1813 accept

Allow TCP 1813 (RADIUS accounting). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 1813 accept

Allow UDP 1813 (RADIUS accounting). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 1813 -j ACCEPT

Allow TCP 1813 (RADIUS accounting). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 1813 -j ACCEPT

Allow UDP 1813 (RADIUS accounting). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-radiusaccounting-1813 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 1813

Inbound rule for 1813 (RADIUS accounting). 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=1813,ToPort=1813,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 1813 (RADIUS accounting). 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=1813,ToPort=1813,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 1813 (RADIUS accounting). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-radiusaccounting-1813 --direction=INGRESS --action=ALLOW --rules=tcp:1813,udp:1813 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 1813 (RADIUS accounting). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow RADIUS accounting 1813/TCP" dir=in action=allow protocol=TCP localport=1813 remoteip=<source>

Inbound TCP 1813 (RADIUS accounting). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow RADIUS accounting 1813/UDP" dir=in action=allow protocol=UDP localport=1813 remoteip=<source>

Inbound UDP 1813 (RADIUS accounting). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow RADIUS accounting 1813/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 1813 -RemoteAddress <source>

Inbound TCP 1813 (RADIUS accounting). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow RADIUS accounting 1813/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 1813 -RemoteAddress <source>

Inbound UDP 1813 (RADIUS accounting). 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.