Sponsored Content
Top Forums UNIX for Advanced & Expert Users pf not working properly even with only "pass in all" and "pass out all" rules Post 45698 by jsilva on Tuesday 30th of December 2003 04:33:06 AM
Old 12-30-2003
Hi,

I don't know if I understood your question...
If your default rule is to block everything, then you have to specify exactly what you want to access ( or what you want to access you ! )... so, if your default rule is to block all, then you have to specify that you want to allow traffic in and out... otherwise, you don't need any of them, all traffic will be allowed...

Let me try to explain the "keep state" and see if it fits on your solution...
You have SSHd ( for example ), running on the server A and you want all clients to be able to use it... you only need to specify one rule, the "in" rule, and the filter will be able to detect that the connection that goes out, belongs to the same connection that was started before... you have to specify on the server that you want to allow port 22 in, keeping state... instead of specifing that you want to allow connection in and out on that port...
If it doesn't look simple, it's because english is not my first language, because it is simple... :-)

Good luck !

Last edited by jsilva; 12-30-2003 at 05:47 AM..
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

2. Shell Programming and Scripting

cat $como_file | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g'

hi All, cat file_name | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g' Can this be done by using sed or awk alone (4 Replies)
Discussion started by: harshakusam
4 Replies

3. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

4. Solaris

The slices "usr", "opt", "tmp" disappeared!!! Help please.

The system don't boot. on the screen appears following: press enter to maintenance (or type CTRL-D to continue)...I checked with format command. ... the slices "0-root","1-swap","2-backup" exist. ...the slises "3-var","6-usr" -unassigned. :( (16 Replies)
Discussion started by: wolfgang
16 Replies

5. AIX

How to use 'expect' to pass UID & Password to a "for loop" in shell script?

Friends, Need someone's help in helping me with the below requirement for a script: > For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details < I know, this is possible through expect programming in a simple... (2 Replies)
Discussion started by: thisissouvik
2 Replies

6. Shell Programming and Scripting

How to use 'expect' to pass UID & Password to a "for loop" in shell script?

Friends, Need someone's help in helping me with the below requirement for a script: > For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details < I know, this is possible through expect programming in a simple... (14 Replies)
Discussion started by: thisissouvik
14 Replies

7. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

8. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies

9. AIX

Apache 2.4 directory cannot display "Last modified" "Size" "Description"

Hi 2 all, i have had AIX 7.2 :/# /usr/IBMAHS/bin/apachectl -v Server version: Apache/2.4.12 (Unix) Server built: May 25 2015 04:58:27 :/#:/# /usr/IBMAHS/bin/apachectl -M Loaded Modules: core_module (static) so_module (static) http_module (static) mpm_worker_module (static) ... (3 Replies)
Discussion started by: penchev
3 Replies
AUDIT_ADD_RULE_DATA(3)						  Linux Audit API					    AUDIT_ADD_RULE_DATA(3)

NAME
audit_add_rule_data - Add new audit rule SYNOPSIS
#include <libaudit.h> int audit_add_rule_data (int fd, struct audit_rule_data *rule, int flags, int action); DESCRIPTION
audit_add_rule adds an audit rule to one of several kernel event filters. The filter is specified by the flags argument. Possible values for flags are: o AUDIT_FILTER_USER - Apply rule to userspace generated messages. o AUDIT_FILTER_TASK - Apply rule at task creation (not syscall). o AUDIT_FILTER_ENTRY - Apply rule at syscall entry. o AUDIT_FILTER_WATCH - Apply rule to file system watches. o AUDIT_FILTER_EXIT - Apply rule at syscall exit. o AUDIT_FILTER_TYPE - Apply rule at audit_log_start. The rule's action has two possible values: o AUDIT_NEVER - Do not build context if rule matches. o AUDIT_ALWAYS - Generate audit record if rule matches. RETURN VALUE
The return value is <= 0 on error, otherwise it is the netlink sequence id number. This function can have any error that sendto would encounter. SEE ALSO
audit_delete_rule_data(3), audit_add_watch(3), auditctl(8). AUTHOR
Steve Grubb. Red Hat Oct 2006 AUDIT_ADD_RULE_DATA(3)
All times are GMT -4. The time now is 10:45 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy