A few weeks back we saw his PS4 Ghosts RTE Mod Tool, and now @Modded Warfare is back with a guide on how to block PS4 updates on any PlayStation 4 Firmware from his YouTube Channel. 
Those seeking a similar block list that covers more host names can also check HERE, and to quote from the video's caption: How to Block PS4 Updates On Any Firmware
How to simply block PS4 updates from being downloaded to your PS4 when you launch games or connect to the Internet.
DNS Addresses:
Download: Wireshark
Additional Sony servers to block are also posted HERE covering more host names and regions, or see here if you're looking to Update to a Specific PS4 Firmware but not Sony's latest PlayStation 4 OFW.
How to manually BLOCK any system firmware update PERMANENTLY on your modded PS4
On PS4, blacklist http://crepo.ww.dl.playstation.net using proxy/DNS. This is the crash reporter.
Those seeking a similar block list that covers more host names can also check HERE, and to quote from the video's caption: How to Block PS4 Updates On Any Firmware
How to simply block PS4 updates from being downloaded to your PS4 when you launch games or connect to the Internet.
DNS Addresses:
- fuk01.ps4.update.playstation.net
- duk01.ps4.update.playstation.net
- fus01.ps4.update.playstation.net
- al02.cdn.update.playstation.net
- a01.cdn.update.playstation.org.edgesuite.net
- playstation.sony.akadns.net
- a192.d.akamai.net
Download: Wireshark
Additional Sony servers to block are also posted HERE covering more host names and regions, or see here if you're looking to Update to a Specific PS4 Firmware but not Sony's latest PlayStation 4 OFW.
How to manually BLOCK any system firmware update PERMANENTLY on your modded PS4
On PS4, blacklist http://crepo.ww.dl.playstation.net using proxy/DNS. This is the crash reporter.
Code:
# Title: ps4_dns_block/phoanglong
#
# This hosts file is a merged collection of hosts from depressive_monk
# to disable any update from ps4. I'm just creating GitHub Raw Hosts data so everyone can use
# This work is by depressive_monk, please give all the credit to him
# https://www.reddit.com/user/depressive_monk/
# Date: 26 May 2021
#
# ===============================================================
0.0.0.0 dau01.ps4.update.playstation.net
0.0.0.0 dbr01.ps4.update.playstation.net
0.0.0.0 dcn01.ps4.update.playstation.net
0.0.0.0 deu01.ps4.update.playstation.net
0.0.0.0 dhk01.ps4.update.playstation.net
0.0.0.0 djp01.ps4.update.playstation.net
0.0.0.0 dkr01.ps4.update.playstation.net
0.0.0.0 dmx01.ps4.update.playstation.net
0.0.0.0 dru01.ps4.update.playstation.net
0.0.0.0 dsa01.ps4.update.playstation.net
0.0.0.0 dtw01.ps4.update.playstation.net
0.0.0.0 duk01.ps4.update.playstation.net
0.0.0.0 dus01.ps4.update.playstation.net
0.0.0.0 fau01.ps4.update.playstation.net
0.0.0.0 fbr01.ps4.update.playstation.net
0.0.0.0 fcn01.ps4.update.playstation.net
0.0.0.0 feu01.ps4.update.playstation.net
0.0.0.0 fhk01.ps4.update.playstation.net
0.0.0.0 fjp01.ps4.update.playstation.net
0.0.0.0 fkr01.ps4.update.playstation.net
0.0.0.0 fmx01.ps4.update.playstation.net
0.0.0.0 fru01.ps4.update.playstation.net
0.0.0.0 fsa01.ps4.update.playstation.net
0.0.0.0 ftw01.ps4.update.playstation.net
0.0.0.0 fuk01.ps4.update.playstation.net
0.0.0.0 fus01.ps4.update.playstation.net
0.0.0.0 hau01.ps4.update.playstation.net
0.0.0.0 hbr01.ps4.update.playstation.net
0.0.0.0 hcn01.ps4.update.playstation.net
0.0.0.0 heu01.ps4.update.playstation.net
0.0.0.0 hhk01.ps4.update.playstation.net
0.0.0.0 hjp01.ps4.update.playstation.net
0.0.0.0 hkr01.ps4.update.playstation.net
0.0.0.0 hmx01.ps4.update.playstation.net
0.0.0.0 hru01.ps4.update.playstation.net
0.0.0.0 hsa01.ps4.update.playstation.net
0.0.0.0 htw01.ps4.update.playstation.net
0.0.0.0 huk01.ps4.update.playstation.net
0.0.0.0 hus01.ps4.update.playstation.net
0.0.0.0 a01.cdn.update.playstation.org.edgesuite.net
0.0.0.0 a192.d.akamai.net
0.0.0.0 al02.cdn.update.playstation.net
0.0.0.0 apicdn-p014.ribob01.net
0.0.0.0 api-p014.ribob01.net
0.0.0.0 artcdnsecure.ribob01.net
0.0.0.0 asm.np.community.playstation.net
0.0.0.0 get.net.playstation.net
0.0.0.0 playstation.sony.akadns.net
0.0.0.0 post.net.playstation.net
0.0.0.0 ps4-eb.ww.np.dl.playstation.net
0.0.0.0 ps4updptl.eu.np.community.playstation.net
0.0.0.0 ps4updptl.jp.sp-int.community.playstation.net
0.0.0.0 ps4.updptl.sp-int.community.playstation.net
0.0.0.0 sf.api.np.km.playstation.net
0.0.0.0 themis.dl.playstation.net
0.0.0.0 tmdb.np.dl.playstation.net
0.0.0.0 t-prof.np.community.playstation.net