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The SSH daemon must be configured to not allow TCP connection forwarding.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| GEN005515-ESXI5-000100 | GEN005515-ESXI5-000100 | GEN005515-ESXI5-000100_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. |
| STIG | Date |
|---|---|
| VMware ESXi v5 Security Technical Implementation Guide | 2013-01-15 |
Details
| Check Text ( C-GEN005515-ESXI5-000100_chk ) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Check the SSH daemon configuration for the TCP connection forwarding setting. # grep -i AllowTCPForwarding /etc/ssh/sshd_config | grep -v '^#' If "AllowTCPForwarding" is set to "yes", this is a finding. Re-enable lock down mode. |
| Fix Text (F-GEN005515-ESXI5-000100_fix) |
|---|
| Disable lock down mode. Enable the ESXi Shell. Edit the SSH daemon configuration and add/modify the "AllowTCPForwarding" configuration setting it to "no". # vi /etc/ssh/sshd_config Re-enable lock down mode. |