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That's a problem at the firewall that logged the error. Is there something else using the same source port?
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I figure out the issue by &nbsp;myselft
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hi, <br />
<br />
we using a &nbsp;BELL 1000 DSL modem with a static IP &nbsp;in the bride mode and setup my Cisco SA540 firewall as router connect to the modem, I setup this firewall a VPN connect to other branch office, it's good for 2 month. <br />
<br />
but starting from 2 days ago, everyday it will randomly dropping the VPN 2 -3 times, every time reboot the firewall will connect the VPN again, I check the log file it keep saying like bottom, any idea? is that mean my IP in use or branch IP in use?<br />
Thu Oct 27 16:03:53 2016 (GMT -0400): [Cisco] [IKE] ERROR: &nbsp;failed to bind (Address already in use).
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hi, 

we using a  BELL 1000 DSL modem with a static IP  in the bride mode and setup my Cisco SA540 firewall as router connect to the modem, I setup this firewall a VPN connect to other branch office, it's good for 2 month. 

but starting from 2 days ago, everyday it will randomly dropping the VPN 2 -3 times, every time reboot the firewall will connect the VPN again, I check the log file it keep saying like bottom, any idea? is that mean my IP in use or branch IP in use?
Thu Oct 27 16:03:53 2016 (GMT -0400): [Cisco] [IKE] ERROR:  failed to bind (Address already in use).

CISCO SA540 firewall keep dropping the VPN

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.