The SSH daemon must be configured to not allow gateway ports.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-39250 | GEN005517-ESXI5-000101 | SV-51066r2_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 ESXi Server 5.0 Security Technical Implementation Guide | 2017-01-06 |
Details
| Check Text ( C-46514r2_chk ) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Execute the following command(s): # grep -i GatewayPorts /etc/ssh/sshd_config If "GatewayPorts" is not set to "no", this is a finding. Re-enable lock down mode. |
| Fix Text (F-44229r2_fix) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Execute the following command(s): # vi /etc/ssh/sshd_config Add/modify the attribute line entry to the following (quotes for emphasis only): "GatewayPorts no" Re-enable lock down mode. |