FAQ, Tips
Avira Professional Security - User Manual (Status: 23 Sep. 2011)
65
Check if the rule is directly above the rule
Deny all IP packets
.
Warning
This rule is potentially dangerous because it will allow UDP packets without any
filtering! After working with the virtual machine change to your previous security
level.
Virtual Private Network (VPN) Connection is blocked, if the security level of Avira
FireWall is set to medium or high.
Reason: This problem is caused by the last rule
Deny all IP packets
which discards all
packets that do not comply with any of the rules above it. The type of packages dispatched
by the VPN software (so-called GRE packets) do not fit into the other categories and
therefore they are filtered by this rule.
Replace the rule
Deny all IP packets
with two new rules which will deny the TCP and
UPD packets. In this way there is the possibility to allow packets of other protocols.
An email sent via a TSL connection has been blocked by Mail Protection.
Reason: Transport Layer Security (TLS: encryption protocol for data transfers on the
Internet) is not supported by Mail Protection at this time. The following options are
available for sending the email:
Use a different port from port 25, which is used by SMTP. This will bypass monitoring
by Mail Protection.
Turn off the TSL encrypted connection and disable TSL support in your email client.
Disable (temporarily) monitoring of outgoing emails by Mail Protection in the
configuration under
Mail Protection > Scan
.
Webchat is not operational: Chat messages are not displayed; data are being loaded in
the browser.
This phenomenon may occur during chats, which are based on the HTTP protocol with
'transfer-
encoding= chunked‟.
Reason: Web Protection checks the data sent completely for viruses and undesired
programs first of all, before the data are loaded into the web browser. During a data
transfer with „transfer-encoding= chunked‟, Web Protection cannot determine the message
length or the data volume.
Enter the configuration of the URL of the web chats as an exception (see
Configuration:
Web Protection > Exceptions
).
