I have attempted to hard set the interface to 100/full as well, but that just makes throughput worse. Outside interface is configured for auto-negotiate and is negotiating at 100/Full. I have tried removing any service policies, opening up firewall rules, etc. If i bypass the ASA i get these speeds without issue. Just a workaround to turn the Cisco philosophy around and only force outgoing TLS connections.I have a 5505 firewall and recently upgraded our internet to 100Mbps down 20Mbps up. The second match rule will not be applied to the TLS connections cause the encryption… Second the match body line lenght will drop a unsecured connection that basicly can get inspected (cool!) That worked on the ASA 5505 with this configuration:įirst set the allow-tls parameter to allow the TLS connection. So my goal is to force a SMTP with TLS connection when setting up local devices and applications by using the Office 365 relay. When setting up the ‘emailserver of your organisation’ relay in the mailflow connector of the O365 Exchange management both connections SMTP plain and SMTP TLS are allowed. Since the GDPR was finally approved by the EU Parliament, secured email connections has become a discussed item in much organisations. That’s the theory to block the TLS connections So basicly it isn’t possible to inspect the data anymore. When using TLS over SMTP encryption the MTA to MTA connection is encrypted from host to host. Reason is the possibility to inspect the traffic and the ability for traffic classification. By default Cisco ASA devices have disallowed SMTP TLS traffic on ASA firewalls.
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