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viosecure -level high should set default firewall rules to denied for inbound traffic
IBM support case TS006803177: --------------------------------------- After applying vioscure level 'high', the default firewall rule 0 permits all IP packages, if an IP package does not met any rules. This make the firewall settings useless if you want to permit only a certain host or netwerk id.
The proposed solution is one of the following below:
a) Set default firewall rules for Ipv4 and IPv6 to 'deny' and allow all outbound traffic for 'viosecure level high' using commands # mkfilt -z D # genfilt -v 4-a P -s 0.0.0.0 -m 0.0.0.0 -w O # genfilt -v 6-a P -s 0.0.0.0 -m 0.0.0.0 -w O
b) Add default permit or deny option as an argument to the 'viosecure -firewall' command.
Additional rules to allow inbound access can be configured using standard 'viosecure -firewall' commands.
Also the viosecure -firewall command should be enhanced to create rules based on a network id like 192.168.1.1/16; not only by host or ALL (0.0.0.0/0)
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