Our IP address was recently blacklisted due to a misconfiguration/hack on our IronPort. This hole has been addressed.
I am seeking advice on how to reduce the impact on our business when we are blacklisted. It seems common that BLs take 24-48 hours if not longer to clear up. This cannot fly in a business environment. How do you have your infrastructure setup to reduce the impact of a BL? Do you have multiple IP addresses configured for SMTP traffic?
We have a single Cisco ASA firewall and all outbound mail traffic (SMTP 25) goes through the device. A reverse lookup currently shows our ASA's IP address.
My theory is to configure a second external IP address in order to move SMTP traffic through while we are on a blacklist.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...