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Hello,<br />
<br />
I have an issue with one site connecting to head office. There are three other sites already having site to site VPNs with head office and they work reliably. There is not much to get wrong in the wizard, it is simple enough but with this site the VPN gets set up but the remote site is receiving no packets from the head office. Looking at the head office ASA I see it is receiving packets but sending nothing.<br />
However, sometimes by rebooting one or the other firewalls (or even both) the VPN will work correctly for anything from a few hours to a few weeks before reverting back to the situation above.<br />
<br />
All the branch offices are running OS version 9.6(1)<br />
<br />
Does anyone have any ideas please?<br />
<br />
Thank you.<br />
<br />
Alasdair Barclay
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Hello,

I have an issue with one site connecting to head office. There are three other sites already having site to site VPNs with head office and they work reliably. There is not much to get wrong in the wizard, it is simple enough but with this site the VPN gets set up but the remote site is receiving no packets from the head office. Looking at the head office ASA I see it is receiving packets but sending nothing.
However, sometimes by rebooting one or the other firewalls (or even both) the VPN will work correctly for anything from a few hours to a few weeks before reverting back to the situation above.

All the branch offices are running OS version 9.6(1)

Does anyone have any ideas please?

Thank you.

Alasdair Barclay

Cisco ASA site to site packets only go one way

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.