The discard daemon must be disabled on AIX.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215377 | SRG-OS-000095-GPOS-00049 | AIX7-00-003072 | SV-215377r958478_rule | 2024-08-16 | 3 |
| Description |
|---|
| The discard service is used as a debugging and measurement tool. It sets up a listening socket and ignores data that it receives. This is a /dev/null service and is obsolete. This can be used in DoS attacks and therefore, must be disabled to prevent attacks. |
| ℹ️ Check |
|---|
| From the command prompt, execute the following command: # grep "^discard[[:blank:]]" /etc/inetd.conf If there is any output from the command, this is a finding. |
| ✔️ Fix |
|---|
| In "/etc/inetd.conf", comment out the "discard" entries by running commands: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'discard' -p 'tcp' # chsubserver -r inetd -C /etc/inetd.conf -d -v 'discard' -p 'udp' Restart inetd: # refresh -s inetd |