Since switching to Verizon Home 5G I’ve had some pretty awful connectivity issues on our work VPN. Some internal URLs were taking 5+ minutes to load (curl showed ~27kb/s speed). Since fast.com reported both on/off vpn speeds of 250+ mbps, I was blaming the application/network teams.
I came across this post today: https://www.reddit.com/r/Rural_Internet/comments/rcujxz/fixed_an_issue_with_verizon_lte_home_internet_and/
and disabled all ALG settings and this immediately cleared up the issue.
to do this, login to your router and head to the Security → Firewall section and select the “Maximum” radio button and save the changes. Now head to NAT Forwarding → ALG and ensure all settings are disabled.
just wanted to post this here in case this helps anyone!
fwiw, I’m not a networking guru and don’t fully understand what these options do (maybe someone can educate me here) but the difference is night and day.
for the techies, here are the speed comparisons from curl:
ALG settings enabled:
time_namelookup: 0.112801s
time_connect: 0.162479s
time_appconnect: 0.299671s
time_pretransfer: 0.299742s
time_redirect: 0.000000s
time_starttransfer: 0.627430s
speed_download: 30602.000
speed_upload: 0.000
num_connects: 1
num_redirects: 0
----------
time_total: 495.826137s
ALG settings disabled:
time_namelookup: 0.001720s
time_connect: 0.052580s
time_appconnect: 0.188654s
time_pretransfer: 0.188712s
time_redirect: 0.000000s
time_starttransfer: 0.257600s
speed_download: 1189114.000
speed_upload: 0.000
num_connects: 1
num_redirects: 0
----------
time_total: 17.451351s