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Full Discussion: Testing connectivity to an URL
Top Forums UNIX for Advanced & Expert Users Testing connectivity to an URL Post 303045332 by anaigini45 on Tuesday 17th of March 2020 04:04:53 AM
Old 03-17-2020
Testing connectivity to an URL
Hi,


I need to access this URL from my laptop :


However, I am not able to. Error received was "Connection was reset".
(Attached image)



My laptop IP is 192.168.8.149, and I do a telnet to confirm the connectivity :


Code:
C:\Users\Owner>telnet 192.168.121.72 8081
Connecting To 192.168.121.72...Could not open connection to the host, on port 8081: Connect failed

C:\Users\Owner>

I do a curl directly from the host that runs the atricore modules :


Code:
[root@amanda-server etc]# curl -Is http://localhost:8081/atricore-console/ | head -1
HTTP/1.1 302 Found

This is the output from ss -tulpn for port 8081 :


Code:
tcp   LISTEN     0      50                                                            [::]:8081                                                                      [::]:*                   users:(("java",pid=11585,fd=339))

Correct me if I am wrong, but I believe the telnet clearly shows that the access to that ip and port is not available, and most probably due to physical firewall connection?
This is because there is no firewalld running within the server itself :


Code:
[root@amanda-server etc]# systemctl status firewalld
- firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[root@amanda-server etc]#

And what does the status HTTP/1.1 302 Found mean from the curl output?
I hope opening the port at the physical firewall level will resolve this problem?
Last edited by anaigini45; 03-17-2020 at 05:11 AM..
 

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LEARN ABOUT CENTOS

firewalld.lockdown-whitelist

FIREWALLD.LOCKDOWN(5)					   firewalld.lockdown-whitelist 				     FIREWALLD.LOCKDOWN(5)

NAME

       firewalld.lockdown-whitelist - firewalld lockdown whitelist configuration file

SYNOPSIS

       /etc/firewalld/lockdown-whitelists.xml

DESCRIPTION

       The firewalld lockdown-whitelist configuration file contains the selinux contexts, commands, users and user ids that are white-listed when
       firewalld lockdown feature is enabled (see firewalld.conf(5) and firewall-cmd(1)).

       This example configuration file shows the structure of an lockdown-whitelist file:

	   <?xml version="1.0" encoding="utf-8"?>
	   <whitelist>
	     <selinux context="selinuxcontext"/>
	     <command name="commandline[*]"/>
	     <user {name="username|id="userid"}/>
	   </whitelist>

OPTIONS

       The config can contain these tags and attributes. Some of them are mandatory, others optional.

   whitelist
       The mandatory whitelist start and end tag defines the lockdown-whitelist. This tag can only be used once in a lockdown-whitelist
       configuration file. There are no attributes for this.

   selinux
       Is an optional empty-element tag and can be used several times to have more than one selinux contexts entries. A selinux entry has exactly
       one attribute:

       context="string"
	   The context is the security (SELinux) context of a running application or service.

	   To get the context of a running application use ps -e --context and search for the application that should be white-listed.

	   Warning: If the context of an application is unconfined, then this will open access for more than the desired application.

   command
       Is an optional empty-element tag and can be used several times to have more than one command entry. A command entry has exactly one
       attribute:

       name="string"
	   The command string is a complete command line including path and also attributes.

	   If a command entry ends with an asterisk '*', then all command lines starting with the command will match. If the '*' is not there the
	   absolute command inclusive arguments must match.

	   Commands for user root and others is not always the same, the used path depends on the use of the PATH environment variable.

   user
       Is an optional empty-element tag and can be used several times to white-list more than one user. A user entry has exactly one attribute of
       these:

       name="string"
	   The user with the name string will be white-listed.

       id="integer"
	   The user with the id userid will be white-listed.

SEE ALSO

       firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(5), firewalld.icmptype(5),
       firewalld.lockdown-whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5), firewalld.zone(5),
       firewalld.zones(5)

NOTES

       firewalld home page at fedorahosted.org:
	   http://fedorahosted.org/firewalld/

       More documentation with examples:
	   http://fedoraproject.org/wiki/FirewallD

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
	   Developer

       Jiri Popelka <jpopelka@redhat.com>
	   Developer

firewalld 0.3.9 													     FIREWALLD.LOCKDOWN(5)
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