Howto NAT VPN Traffic on a Cisco ASA
Say you have to setup a Site-to-Site VPN to a third party who can’t accept traffic from the subnet you have created on your internal network because your network overlaps with theirs, or as in my case, they just want one address coming over to their network. The answer is to NAT that VPN traffic using a non-overlapping IP address.
Cisco ASA Firmware Update on Failover Cluster
First we need to copy the firmware update and the ASDM on the Units. Please note these are not synced unlike the configuration. With savings via ASDM once again on the active to the passive IP and then upload it via browser, alternatively via CLI and tftp:
Cisco PIX/ASA Causes SMTP Banner Corruption
Traffic inspection rules on a Cisco PIX or ASA firewall will sometimes cause the SMTP banner to appear corrupted. When testing access to your mail server trough AsA, you may notice that the SMTP banner looks like this: