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Why do you need to define an ACL for VPN's to work?

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Question added by Leo Jr Argoso , Trustee – IECEP-KSA-CRC
Date Posted: 2017/06/26

Hi! I've been through a similar situation, and in fact, it can happen for a variety of reasons, including exceeding the request limit. I recommend starting with understanding why exactly the blocking occurred. I also recommend reading the article at https://clearvpn.com/blog/your-ip-has-been-temporary-blocked/ it explains in detail how such blocking occurs and what can be done. Also, if the blocking is temporary, try disconnecting and reconnecting, sometimes changing the IP helps. If not, you can use a VPN to bypass, but remember that this is a temporary solution.

Raider Rohob
by Raider Rohob , Law Lecturer , OO saw

Hello! I recently encountered this problem - my IP was temporarily blocked, and now I can't access the sites I need. And it happened suddenly, although I don't remember breaking the rules. I would like to understand how to quickly unblock the IP address or find some temporary solution. Maybe someone has already gone through this? I would be glad to hear your experience and advice!

Hafiz Salman Shafiq
by Hafiz Salman Shafiq , Manager Network & Infrastructure Security , Engro Corp

To define interesting traffic. the fine Source & destination will then pass through the tunnel.

Deleted user
by Deleted user

You need ACL to specify what source and destination IP address that will be permit/deny passing through your VPN tunnel.

Yousif Alla Aldin Awaad
by Yousif Alla Aldin Awaad , IP network & security operations specialist , huawei

ACL is used as matching mechanism for matching traffic to be encrypted in the VPN tunnel

RAGHU P R
by RAGHU P R , windows administrator , spectrum softtech solutions pvt ltd

ACL allows and denies incoming and outgoing connections. It filters unwanted vpn tunnel connections. Only premitted ip can connect to the vpn server through ACL. Since critical systems are connected with VPN, ACL is a necessary part.

TAHA HUSSAIN
by TAHA HUSSAIN , Solutions Architect Cybersecurity , Evanssion FZCO

Let's say you have a Firewall in Dubai that has3 VPN tunnels. One connected to London,2nd to Australia and the3rd to Egypt.

Now, when the traffic comes to this Firewall, how is it going to know where to send the traffic? London, Australia or Egypt.

That's when the ACL comes into picture.

e.g Sample ACL = Permit traffic From..0.0 To...0 (Dubai-Australia).

When the firewall sees a packet that has source ip from (..0.0) subnet and destination ip from (...0) subnet, it's going to forward it to the VPN interface that is connected to Australia Firewall.

That's basic!

HTH

 

Wael Alaya
by Wael Alaya , Senior Software and Support Engineer , Flora Technology

we need to define an ACL for VPN in order to permit or deny various types of traffic.

Ibrahim Adawi
by Ibrahim Adawi , Administrative Assistant , هيئة تطوير وتعمير المناطق الجبلية بجازان Mountain Development Authority in Jazan

thanks for inviting me

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