Posted on 2011-05-08
i have an email server being natted via my cisco asa firewall. i created a static for it and allowed smtp access via an access list. it works perfectly for a few hours and all of a sudden it loses connectivity to the internet while all other users being patted via the asa interface ip address still browse. if i remove the following (below), access is restored.
1) remove the static command
2) put the email servers ip address on the external interface of my firewall for a afew seconds.
3) remove the ip address from the firewall interface and configure it back for my email server using the static command
4) issue a cl xl command
it works again after this for a few hours and gets knocked off again. if i repeat the process above, access is restored again for a few hours. any ideas on how to get this sorted permanently is much appreciated.