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The SSH daemon must be configured to not allow gateway ports.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-63213 | ESXI-06-000022 | SV-77703r1_rule | Low |
| Description |
|---|
| SSH TCP connection forwarding provides a mechanism to establish TCP connections proxied by the SSH server. This function can provide similar convenience to a Virtual Private Network (VPN) with the similar risk of providing a path to circumvent firewalls and network ACLs. Gateway ports allow remote forwarded ports to bind to non-loopback addresses on the server. |
| STIG | Date |
|---|---|
| VMware vSphere ESXi 6.0 Security Technical Implementation Guide | 2017-07-11 |
Details
| Check Text ( C-63947r1_chk ) |
|---|
| To verify the GatewayPorts setting, run the following command: # grep -i "^GatewayPorts" /etc/ssh/sshd_config If there is no output or the output is not exactly "GatewayPorts no", this is a finding. |
| Fix Text (F-69131r1_fix) |
|---|
| To set the GatewayPorts setting, add or correct the following line in "/etc/ssh/sshd_config": GatewayPorts no |