WEBVTT 00:01.270 --> 00:10.690 Another option is minus L minus lists, all rules in the selected chain, in the specified table, if 00:10.690 --> 00:14.050 no chain is given, all exchanges are listed. 00:18.350 --> 00:29.030 For example, table is minus L leaks all in the filter table and all exchanges, input output and forward. 00:30.470 --> 00:40.970 It's common to use minus option together with N from numeric and V from a verbose like this, we'll 00:40.970 --> 00:48.080 talk more about the minus L. in another lecture where we'll dive deeper into listing the Linux fireballer. 00:50.640 --> 00:57.930 Minus F means flash the selected chain or all the chains in the table if man is given. 00:59.340 --> 01:03.510 This is equivalent to deleting all the rules one by one. 01:05.610 --> 01:12.290 For example, if I want to flush the input chain, I can simply execute depletable tables, minus if 01:12.300 --> 01:12.840 input. 01:14.580 --> 01:21.270 Now, when I'm listing the chains, I can see that there is no rules on the input chain. 01:22.640 --> 01:23.900 They have been flushed. 01:25.180 --> 01:32.410 If I don't specify the chain, it will flash all changed from that table and by default, it's the filter 01:32.410 --> 01:32.860 table. 01:35.640 --> 01:39.300 It has flushed all the chains of filter tabun. 01:41.560 --> 01:45.310 Now I'm flashing all the actions of the night table. 01:48.740 --> 01:53.030 We'll discuss more about my inner self in a subsequent chapter. 01:54.850 --> 02:03.470 Minus Ximenes zero, the picket and the bite counters in all the chains are only in the given chain. 02:03.940 --> 02:05.790 Let me show you an example. 02:06.190 --> 02:14.960 I'll add to the output chain that accepts SSX, outgoing traffic or traffic to a remote SSX server. 02:15.250 --> 02:27.400 This Linux, being the SSX client IP table is minus a output minus Tsipi minus minus deport 22. 02:27.730 --> 02:36.640 The packets are going to part 22 minus G accept and I'm connecting to a remote S.H. server just to have 02:36.640 --> 02:38.080 some mixed packets. 02:43.170 --> 02:48.900 OK, I am pressing control, plus, see, I don't want to connect to a Web server. 02:50.280 --> 02:52.680 I just wanted some more Mixtepec. 02:54.810 --> 02:56.310 When I listed the fireball. 02:57.580 --> 03:05.680 We see that there are nine mixed paychecks or one thousand nine hundred twenty five bite's. 03:06.910 --> 03:12.970 IP table is minus Z will reset packett and bite counters. 03:14.590 --> 03:20.260 We see that the number of packages and the bikes matched by the will have been reset. 03:21.400 --> 03:25.850 Minus N creates a new user defined chain by the given name. 03:26.200 --> 03:34.330 We can create a user defined change simply by writing IP tables minus N and the name of the new user 03:34.330 --> 03:36.100 defined or custom chain. 03:38.310 --> 03:40.980 IP table is Minocin McShane. 03:44.610 --> 03:53.490 When running table is minus VSL, we see all the chains, including the custom chain I've just created 03:54.360 --> 04:01.980 now to delete that chain I use minus X option IP table is minus X my chain. 04:02.400 --> 04:06.630 I don't go deeper into user defined chains at this moment. 04:06.900 --> 04:10.560 Will have an entire section on this later in the course. 04:12.810 --> 04:21.060 And finally, minus P6, the default policy for the building chain's input output and forward the default 04:21.060 --> 04:24.650 policy specifies what happens to kicks. 04:24.720 --> 04:28.800 They are not mixed by any rule and can be either. 04:28.800 --> 04:29.970 Accept Ogtrop. 04:32.040 --> 04:34.860 The default policy is set to accept. 04:37.420 --> 04:45.820 We can change the default policy using IP tables, minus be the name of the chain and then input or 04:45.820 --> 04:46.190 drop. 04:46.600 --> 04:50.880 For example, I am setting the policy for the forward chain. 04:52.130 --> 04:58.850 IP stabilised minus the name of the chain forward and the policy drop. 05:00.970 --> 05:06.340 This means that each packet that is not accepted by all will be dropped. 05:08.420 --> 05:11.750 We'll have a dedicated lecture on policies. 05:14.870 --> 05:22.520 And the last option we take a look at in this lecture is minus it deletes one or more rules from the 05:22.520 --> 05:23.710 selected chain. 05:24.380 --> 05:31.310 We don't use this option too much because we often write all the rules in a script and then run the 05:31.310 --> 05:31.760 script. 05:32.330 --> 05:38.450 If we want to delete or modify a rule, we simply modify the script and it again. 05:41.590 --> 05:48.250 But if you want to use the minus the option to delete an IP table scroll, you just have to specify 05:48.250 --> 05:51.790 the line number you want to delete like this. 05:53.020 --> 05:59.010 They are loaded into memory and by the list, the filter table to see Douglas. 06:02.440 --> 06:07.030 Let's delete this rule, which is the second rule of the output chain. 06:08.380 --> 06:16.570 So I write IP tables minus the output and to where two means the second line. 06:18.020 --> 06:26.060 And now when I least the filter table of input output and product change, we notice that the rule has 06:26.060 --> 06:26.750 been deleted. 06:29.860 --> 06:36.230 OK, these are the most important IP table, scumbag's options or flex. 06:36.550 --> 06:37.120 Thank you.