logo
down
shadow

Restrict a process to read "/etc/resolv.conf" file in linux


Restrict a process to read "/etc/resolv.conf" file in linux

By : Annadote
Date : September 23 2020, 03:00 PM
will help you It is not easy to prevent the access to /etc/resolv.conf. But you can tell the resolver the number of attempts to perform for DNS name resolving through the environment variable RES_OPTIONS. Even zero attempts are a valid value there and causes name resolution to fail instantly.
See for example:
code :
RES_OPTIONS="attempts:0" telnet www.google.de
telnet: could not resolve www.google.de/telnet: Temporary failure in name resolution
...
putenv("RES_OPTIONS=attempts:0");
execl(...);
...


Share : facebook icon twitter icon
DHCP overwrites Cisco VPN resolv.conf on Linux

DHCP overwrites Cisco VPN resolv.conf on Linux


By : user218795
Date : March 29 2020, 07:55 AM
With these it helps If you are using the Ubuntu default with NetworkManager, try removing the CiscoVPN client and use the NetworkManager vpnc plugin to connect to the Cisco VPN. This should avoid all problems, since NetworkManager then knows about your VPN connection.
Linux: How do i edit resolv.conf

Linux: How do i edit resolv.conf


By : naga.v
Date : March 29 2020, 07:55 AM
I hope this helps . Your system uses resolvconf, so the resolv.conf file is replaced by a symbolic link to /etc/resolvconf/run/resolv.conf and resolvconf dynamically generated the file. That's why DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
To properly update the information in the file, you can put the dns-* parameters in /etc/network/interfaces e.g.
code :
auto eth0
iface eth0 inet static
     address 33.33.13.10
     netmask 255.255.255.0
     gateway 33.33.13.1
     dns-nameservers 33.33.13.1 12.34.56.78
     dns-search example.com
$ resolvconf -d eth0
$ resolvconf -a eth0
    $ rm /etc/resolv.conf         ;# to remove the symlink
    $ vi /etc/resolv.conf         ;# to create a regular file
how to write filter conf file in logstash to read myCustomLogFile with "|" seprator and key=value

how to write filter conf file in logstash to read myCustomLogFile with "|" seprator and key=value


By : user3293678
Date : March 29 2020, 07:55 AM
like below fixes the issue Use the kv filter:
code :
filter {
  kv {
    field_split => "|"
  }
}
filter {
  kv {
    field_split => "|"
    remove_field => ["message"]
  }
  date {
    match => ["time", "YYYY-MM-dd HH:mm:ss"]
    remove_field => ["time"]
  }
}
mutate {
  convert => {
    "loc" => "integer"
    "rule" => "integer"
    "s_port" => "integer"
    "service" => "integer"
  }
}
Reading from file /etc/resolv.conf and populating in named.conf.options

Reading from file /etc/resolv.conf and populating in named.conf.options


By : mike
Date : March 29 2020, 07:55 AM
To fix the issue you can do An exec will always run unless it has something to limit it. There are a number of parameters you can set.
In your case, it sounds like you want the exec to run only when your file changes. You might want to use the refreshonly parameter on your exec.
code :
file { '/etc/bind/named.conf.options':
    ensure  => present,
    content => template('my_template_location/named.conf.options.erb'),
    replace => true,
}
~>
exec { "add_nameserver":
    command     => '/bin/sed -i "s/<name_server>/$(grep nameserver/etc/resolv.conf | tr -d [a-z])/g" /etc/bind/named.conf.options',
    refreshonly => true,
}
Kubernetes DNS lookup issue and "invalid" in the /etc/resolv.conf file

Kubernetes DNS lookup issue and "invalid" in the /etc/resolv.conf file


By : johnny applesauce
Date : March 29 2020, 07:55 AM
To fix the issue you can do As configured in CoreDNS ConfigMap default upstream nameservers are inherited from node, that is everything outside the cluster domain (.cluster.local)
So "invalid" is an entry copied from Node's /etc/resolv.conf file during Pod creation.
Related Posts Related Posts :
  • Avoid Overflow when Calculating π by Evaluating a Series Using 16-bit Arithmetic?
  • How to handle data or char -1 when reading from file, since EOF is also -1
  • Compare every 1kb of contents of two files instead of character by character
  • Understanding functions in stm8s disassembly?
  • Recursive and no-recursive get different answer
  • Can anyone explain the following output of the code?
  • How to resync time from NTP server in esp-idf?
  • Output for the following C code is confusing me
  • Determine if window is visible with High CPU
  • Writing a file by taking input from user only saves value for "x" only
  • How should I fill an array of ints from a file using command line args? The size of the file and the no. of elements may
  • Segmentation Fault While Reading File in C
  • Fill an array at index n with m times data without bit-fields
  • Why don't the values I type in the terminal match the values I've already stored in the array?
  • MPLABX XC16 unable to resolve built-in identifier __builtin_dmaoffset
  • How call and compile function from elf to my binary?
  • Modifying non-const char array that is referred to by const char array
  • Does anyone see any mistakes here? I am trying to get a message via a pipe, from my parent to child
  • Memory Leak - Singly linked list in C
  • Trouble with translation of typedef between C to D
  • Why does SIGINT stop sleep more than one time?
  • How to pause a timer created with CreateTimerQueueTimer
  • How can I read data from file ? I can't fix it
  • Scanf in visual studio not accepting multiple cases of characters
  • How can I determine if a char* is a windows line ending?
  • I am trying to store value in long long int type but giving wrong return
  • How to manage different kinds of data in a linked list?
  • uint8_t not rollover to 0 after reaching 255 not working properly
  • Why do these two execvp produce different results?
  • Pass uintmax_t or size_t to custom printf conversion specifier
  • Why does free() leaves stuff in memory?
  • Why pointers can't be used to index arrays?
  • memory allocation eror in C
  • C custom datatypes mapped to C datatypes grouped under a single struct
  • pipe() data is not transferred to child process
  • Getting a core dump from a simple C program
  • Fatal error on makefile, need to understand the problem
  • How can I add a delay of 90 minutes when a port has gone from 0 to 1?
  • To use strcpy or not
  • the usage of strtok() in c shows warnings and returns segmentation fault(core dumped)
  • Trouble allocating array of structs
  • Only first char of user input used in array
  • Why does "int x = 5; printf("%d %d %d", x==5, x=10, x==5);" in C print "0 10 0"?
  • How to scan specific string format in C?
  • sscanf skipping the final value when reading multiple values from a line
  • How can I access full memory space in FreeDOS with C application
  • Semantics of sem_getvalue() in POSIX
  • What does the [x,y] symbol mean in a multidimensional array access?
  • compilation error: cast from pointer to integer of different size
  • why am i getting compilation error "error: conflicting types for ‘ptr’ " for the following code? static int va
  • Why does getw return -1 when trying to read a character?
  • Why C program in whch two functions call each other recursively gives segmentation fault on linux?
  • ssize_t is undefined
  • Passing a generic argument in a C function
  • Restoring stdout after redirecting it via freopen()
  • Tuples "cannot be marshalled in a foreign call" when trying to export a Haskell function to C
  • Dereferencing double pointer to pass to recursive function
  • Why is the output different in these two scenarios
  • what will happen if we dont use free() for allocated memory
  • counting words from user input
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk