Registered · Cross-platform

8983 Apache Solr

TCP Unofficial
UDP
SCTP
DCCP

What it is

Solr search server admin/API.

When / why

Search indexing. Multiple RCEs historically — bind internally.

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.

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 8983

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 8983

Allow TCP 8983 (Apache Solr). 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="8983" protocol="tcp" accept'

Allow TCP 8983 (Apache Solr) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 8983 accept

Allow TCP 8983 (Apache Solr). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 8983 -j ACCEPT

Allow TCP 8983 (Apache Solr). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-apachesolr-8983 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 8983

Inbound rule for 8983 (Apache Solr). 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=8983,ToPort=8983,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 8983 (Apache Solr). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-apachesolr-8983 --direction=INGRESS --action=ALLOW --rules=tcp:8983 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 8983 (Apache Solr). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Apache Solr 8983/TCP" dir=in action=allow protocol=TCP localport=8983 remoteip=<source>

Inbound TCP 8983 (Apache Solr). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Apache Solr 8983/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 8983 -RemoteAddress <source>

Inbound TCP 8983 (Apache Solr). 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.