OpenVAS port 80

By default the OPenVAS security assistant listens on port 80 and redirects connections to port 9392, this causes issues if you want to run a web server on the same machine. This manifests itself with the following showing up with lsof:

root@pi-5785:/var/log/openvas# lsof -iTCP -sTCP:LISTEN
COMMAND     PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
sshd        349     root    3u  IPv4  12027      0t0  TCP *:ssh (LISTEN)
sshd        349     root    4u  IPv6  12029      0t0  TCP *:ssh (LISTEN)
gsad      12465     root    5u  IPv4 471034      0t0  TCP *:9392 (LISTEN)
gsad      12468     root    5u  IPv4 471736      0t0  TCP *:http (LISTEN)
openvasmd 14004     root    4u  IPv4 479681      0t0  TCP *:9390 (LISTEN)
postgres  16285 postgres    3u  IPv6  36152      0t0  TCP localhost:postgresql (LISTEN)
postgres  16285 postgres    6u  IPv4  36153      0t0  TCP pi-5785:postgresql (LISTEN)

Note gsad listening on port 80 there as well as 9392.

To completely disable port 80 on Kali Linux, and only use 9392, edit the file /lib/systemd/system/greenbone-security-assistant.service and add the --no-redirect option to the ExecStart part:

ExecStart=/usr/sbin/gsad --foreground --no-redirect --listen=0.0.0.0 --port=9392 --mlisten=0.0.0.0 --mport=9390

After that run systemctl daemon-reload then systemctl restart greenbone-security-assistant and port 80 won't be listening.