iptables
The classic firewall tool of the Linux kernel, used to configure network packet filtering rules. It is powerful but has complex syntax.
Timeline (last 90 days)
Bridge networking is Docker's default network mode: containers obtain independent IPs through a virtual bridge, and NAT and port mapping are implemented through iptables rules.
Ports published by Docker bypass ufw firewall rules by default, directly exposing ports by writing DNAT and FORWARD rules into iptables' nat table and filter table.
eBPF is a virtual machine in the Linux kernel that can be dynamically attached to hooks such as networking, system calls, and tracepoints to execute sandboxed bytecode, and compared with iptables it offers higher programmability, lower performance overhead, and access to process-level metadata.
A more pragmatic self-hosted security route is to perform network isolation at the operating system or container level (such as eBPF or iptables/nftables), combined with a credential broker and short-term tokens, at the cost of increased deployment complexity.
All Facts (4)
Bridge networking is Docker's default network mode: containers obtain independent IPs through a virtual bridge, and NAT and port mapping are implemented through iptables rules.
50%UnverifiedPorts published by Docker bypass ufw firewall rules by default, directly exposing ports by writing DNAT and FORWARD rules into iptables' nat table and filter table.
50%UnverifiedeBPF is a virtual machine in the Linux kernel that can be dynamically attached to hooks such as networking, system calls, and tracepoints to execute sandboxed bytecode, and compared with iptables it offers higher programmability, lower performance overhead, and access to process-level metadata.
50%UnverifiedA more pragmatic self-hosted security route is to perform network isolation at the operating system or container level (such as eBPF or iptables/nftables), combined with a credential broker and short-term tokens, at the cost of increased deployment complexity.
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