esxcli system version get
esxcli network firewall ruleset list | grep httpClient
esxcli network firewall ruleset set -e true -r httpClient
esxcli software sources profile list -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml | grep ESXi-6.5.0
esxcli software profile update -p ESXi-6.5.0-20171004001-standard -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml

esxcli network firewall ruleset set -e false -r httpClient
reboot


info 
https://esxi-patches.v-front.de/ESXi-6.5.0.html


error
http://vivithemage.com/2017/10/14/vmware-6-5-upgrade-failed-with-no-space-left-on-device/

[root@esx1:~] esxcli software profile update -p ESXi-6.5.0-20171004001-standard -d https://hostupdate.vmware.com/software/VUM/PRODUCTION/main/vmw-depot-index.xml
[InstallationError]
[Errno 28] No space left on device
vibs = VMware_locker_tools-light_6.5.0-0.23.5969300
Please refer to the log file for more details.
[root@esx1:~]

I ended up having to install the locker tool first:

cd /tmp
wget http://hostupdate.vmware.com/software/VUM/PRODUCTION/main/esx/vmw/vib20/tools-light/VMware_locker_tools-light_6.5.0-0.23.5969300.vib
esxcli software vib install -f -v /tmp/VMware_locker_tools-light_6.5.0-0.23.5969300.vib

Then I ran the update, and it worked perfect! 


last install ESXi-6.5.0-20171204001-standard