Well-known · Linux/Unix

95 SUPDUP

TCP Yes
UDP Assigned
SCTP
DCCP

What it is

Terminal-independent remote login.

When / why

Historic.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Assigned Assigned by IANA, but not standardized, specified, or widely used on this port.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

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 95

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 95

Allow TCP 95 (SUPDUP). 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="95" protocol="tcp" accept'

Allow TCP 95 (SUPDUP) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 95 accept

Allow TCP 95 (SUPDUP). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 95 -j ACCEPT

Allow TCP 95 (SUPDUP). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-supdup-95 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 95

Inbound rule for 95 (SUPDUP). 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=95,ToPort=95,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 95 (SUPDUP). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-supdup-95 --direction=INGRESS --action=ALLOW --rules=tcp:95 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 95 (SUPDUP). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow SUPDUP 95/TCP" dir=in action=allow protocol=TCP localport=95 remoteip=<source>

Inbound TCP 95 (SUPDUP). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow SUPDUP 95/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 95 -RemoteAddress <source>

Inbound TCP 95 (SUPDUP). 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.