MacOS VPN Log (random disconnects at about 20-30 min mark)

Posts: 6
First Comment Friend Collector
edited November 2023 in Security

I am connecting to a VPN that I setup in my company on the Zyxel USD 60 Router, IKEv2.

Recv IPSec sa: SA([0] protocol = ESP (3), spi_len = 4, spi = 0x07d3ea59, AES CBC key len = 256, HMAC-SHA256-128, No ESN; ).

This VPN works as expected until it randomly disconnects after about 20-30 mins. (Which of course breaks all my Terminal-sessions, other SFTP panels etc. = basically very dangerous to rely on)

  • This VPN has been properly working (no random disconnects) since Catalina / Big Sur (so since 2020)
  • Macbook 12" (Catalina) also since a few months has this disconnect problem
  • iMac 27" + Macbook pro 14" (Sonoma 14.1.1) have this problem as well

Log in Zyxel USG 60:


My setup in Zyxel USG 60:

*VPN Gateway


*VPN Connection

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