Usg 50 3.30(BDS.9) cannot connect using VPN L2TP IPSEC

Posts: 12  Freshman Member
First Comment Friend Collector Fourth Anniversary
edited April 2021 in Security
Hi, I cannot connect anymore using windows 10 or android device on L2TP/IPSEC. If I use Secure extender I can connect with SSL VPN.
If I run connection i still se on windows "connecting". On zywall VPN Monitor show L2TP_VPN_Connection connected but on log I see 2 strange row:
1st:
error
IPSec
SPI: 0x49d36825 (1238591525) SEQ: 0x1 (1) No rule found, Dropping ESP/NAT-T packet
2nd:
notice
Firewall
Match default rule, DROP ACCESS BLOCK

Any suggest to solve this problem?
Thanks Francesco

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Accepted Solution

All Replies

  • Posts: 1,388  Zyxel Employee
    100 Answers 1000 Comments Friend Collector Seventh Anniversary

    Hi @ITS

    We have fixed similar IPSec issue for legacy model, I will send firmware to you by private message.

  • Posts: 12  Freshman Member
    First Comment Friend Collector Fourth Anniversary
    edited March 2020

    sorry, duplicated

  • Posts: 1,425  Guru Member
    Zyxel Certified Network Administrator - Switch 50 Answers 1000 Comments Friend Collector

    @Zyxel_Stanley There's any way to publish all the "latest patched firmwares" for legacy models?

  • Posts: 12  Freshman Member
    First Comment Friend Collector Fourth Anniversary

    Unfortunately Stanley sent me a dropobox link but I never received a notification, and now link ha expired. I asked to Stanley via PM to send me it again, but nothing at the moment.

  • Posts: 1,388  Zyxel Employee
    100 Answers 1000 Comments Friend Collector Seventh Anniversary

    Hi @ITS

    I have sent a new link to you again. Please have a check your mail box.

  • Posts: 3  Freshman Member
    First Comment
    Hello,
    I have a zywall 50 router/firewall and I have this error  "SPI: 0x49d36825 (1238591525) SEQ: 0x1 (1) No rule found, Dropping ESP/NAT-T"
    Please send me the latest firmware update.
    Thanks,
    Daiana
  • Posts: 3  Freshman Member
    First Comment
    Thanks a lot, 
    Daiana
  • Posts: 3  Freshman Member
    First Comment
    Hello again,
    I am trying to upgrade the firmware, but  the message "Firmware upload in progress" never finish.
    Please help
    Daiana
  • Posts: 1,034  Zyxel Employee
    50 Answers 500 Comments Friend Collector Fourth Anniversary
    @Daiana
    Regarding to this case,
    after updated the firmware for a while, did you refresh the browser page? and can I know was the sys LED still blinking?
    Do you have console cable to connect device?

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