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kaCo
kaCo
New Member
January 3, 2025
Solved

FortiClient with Ubuntu 22.04 Bytes Received 0

  • January 3, 2025
  • 6 replies
  • 4793 views

Hey, Guys,

I don’t know if you can help me with this problem, but I have tried many types of configurations network and of interfaces, therefore, the problem still happening. 

 

On Windows I’m abel to Connect and use services of this VPN, but on Ubuntu, after some atualizations of system, when I try to connect the FortiClient shows the “VPN Connect” but the bytes received are iqual 0 and I can’t access the services and VMs. 

I already try restart network confugurations and reinstall FortiClient, but still not working.

 

Thanks for your attention

Best answer by kaCo

Hey, Guys, 

 

First of all, thank you for your help and sorry for taking so long to get back.

 

The only way I found to solve my problem was to downgrade the version. 

Now, I am using the version 6.4 and it works well. 

 

I hope you have a good week!

6 replies

AnthonyH
Staff
AnthonyH
Staff
January 3, 2025

Hello kaCo,

 

Do you know what FortiClient firmware you have installed? The latest FortiClient v7.4.2 support Ubuntu 22.04: https://docs.fortinet.com/document/forticlient/7.4.2/linux-release-notes/136392/product-integration-and-support

 

Also there are recommended installation instructions you can follow here: https://docs.fortinet.com/document/forticlient/7.4.2/linux-release-notes/213138/install-forticlient-linux-from-repo-fortinet-com

 

Lastly have you tried other operating systems or devices to see if the behaviour is replicated? If that is the case it could be a configuration issue on the FortiGate we would need to check further on.

kaCo
kaCoAuthor
New Member
January 15, 2025

Hi @AnthonyH, 

Unfortunately, nothing worked, it keeps setting the bytes to 0.

I'm using the latest version 7.4 on Ubuntu 22.04.

It's creating automatic interfaces every time I try to connect, it shows successful connection and doesn't allow me to access the services.

I tried adding dns to resolv.conf, but that didn't work either.

AEK
SuperUser
AEK
SuperUser
January 4, 2025

Hi kaCo

As first troubleshooting step, you may try sniff from FGT side if anything is received.

Also try sniff on Ubuntu side if anything is sent/received through the tunnel interface.

AEK
kaCo
kaCoAuthor
New Member
January 15, 2025

Unfortunately, nothing worked, it keeps setting the bytes to 0.

I'm using the latest version 7.4 on Ubuntu 22.04.

It's creating automatic interfaces every time I try to connect, it shows successful connection and doesn't allow me to access the services.

I tried adding dns to resolv.conf, but that didn't work either.

kaCo
kaCoAuthor
New Member
January 15, 2025

I still haven't been able to solve the problem, so I'm sending more information to see if you can help me:2025-01-15_12-08.png2025-01-15_12-06.png

AEK
SuperUser
AEK
SuperUser
January 15, 2025

It seems the interface is here with the right IP.

Can you also share the routing table.

AEK
kaCo
kaCoAuthor
New Member
January 15, 2025

I don't know if something changes with the network configurations when the OS updates. But if I use this interface and run the command: sudo ip route add default dev  interface, the VPN works for a moment, but the internet isn't accessible.
2025-01-15_14-06.png

btan
Staff & Editor
btan
Staff & Editor
January 16, 2025

By any chance do you applied any ZTNA tagging in your FGT firewall [SSLVPN -> Internal resource] policy? In FGT, perhaps can filter the ubuntu SSLVPN IP as source IP and see if any traffic logs to see some clues.

kaCo
kaCoAuthorAnswer
New Member
February 3, 2025

Hey, Guys, 

 

First of all, thank you for your help and sorry for taking so long to get back.

 

The only way I found to solve my problem was to downgrade the version. 

Now, I am using the version 6.4 and it works well. 

 

I hope you have a good week!

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