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There is no iptable commandiptables is a Linux command.iptables is a user space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.
There is no iptable commandiptables is a Linux command.iptables is a user space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores. Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.
profiles
If you want to access it remotely you will have to create rules in firewall allowing incoming connections at a specific port. If you have configured just bridged connection, only firewall rules have to be modified. If you run NAT configuration you will have to modify firewall rules as well create portforwarding to Linix VM using Virtual Network Editor.
Yes, if the firewall rules permit it.
No, it filters traffic based on certain set rules.
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it is not possible to live without laws and rules
A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program. Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
Social engineering would not be a possible vulnerability or exploit that may lead to an attacker bypassing the firewall.