TTL: changes the lifetime field of a package. Most routers ignore the value of this field or may act imperfectly if used for their Internet output. Our MANGLE boards They are in charge of modifying the packages, and for this they have the options:ĬOUGH: Type Of Service is used to define the type of service for a packet and should be used to define how packets should be routed, not for packets going to the Internet. However iptables works thanks to a number of table types which is the main topic of this article. 1.2 NAT tables: PREROUTING, POSTROUTING.Being inside the kernel, it starts with the system and remains active all the time and being at the kernel level, it will receive packets and these will be accepted or rejected by consulting the iptables rules. ![]() It is a highly configurable and flexible firewall like most Linux elements, and despite having had some vulnerability, it is nonetheless especially powerful. ![]() IPTABLES, as you should already know, integrates into the Linux kernel itself, and is part of the netfilter project, which in addition to iptables is made up of ip6tables, ebtables, arptables and ipset. ![]() ![]() And it is that security is something that worries and more and more, but if you are Linux you are in luck, since Linux implements one of the best tools that we can find to fight against threats. If you don't know anything about IPTABLES, I recommend you to read our first introductory article to IPTABLES in order to take a base before beginning to explain the subject of the tables in this fantastic element of the Linux kernel to filter and act as a powerful and effective firewall or firewall.
0 Comments
Leave a Reply. |