This is more complex and is what "SEO105 upd" likely refers to.
Instead of plaintext SNMPv1/v2c, move to SNMPv3: mib seo105 upd
Maintain a log:
Many owners ignore firmware updates, assuming “if it ain’t broke, don’t fix it.” That is a dangerous assumption for MIB 2 systems. Here is why the SEO105 UPD process is non-negotiable: This is more complex and is what "SEO105
Cause: Firewall blocking UDP port 69, or incorrect TFTP root directory.
Fix: Disable Windows firewall temporarily. Ensure the .upd file is in the TFTP server’s root folder and named exactly seo105.upd. Instead of plaintext SNMPv1/v2c, move to SNMPv3: Maintain