Thanks for the post. I was having issues on a Site-to-Site ipsec vpn tz370<-->tz300. I can confirm the latest firmware of the tz370 as today 01-13-2022 (7.0.1-5030) still have the same issue connecting to an old Sonicwall TZ300 on a site-to-site VPN . Downgrading the tz370 to 7.0.0-R906 solved the issue for me.
Hey! You will be signed out in 60 seconds due to inactivity. Click here to continue using the site.