Firewalld - source IP not working

 
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Operating Systems Linux Red Hat Firewalld - source IP not working
# 1  
Old 09-19-2017
Firewalld - source IP not working

New to firewalld, and having an issue trying to emulate my old iptable ruleset.

Server has one network interface, which I usually only allow SSH in from certain IPs, I know I can do this with rich rules but have read that this is sub-optimal.

So, I created a new zone, ABCinternal, added a couple of source IPs that are allowed to SSH in, reloaded the firewall and IPs other than the ones listed can still SSH in - what am I missing here?


Code:
[root@rhel7-test zones]# firewall-cmd --zone=ABCinternal --list-all
ABCinternal (active)
  target: 
  icmp-block-inversion: no
  interfaces:
  sources: 192.168.1.10 192.168.1.99
  services: ssh
  ports: 
  protocols: 
  masquerade: no
  forward-ports: 
  source-ports: 
  icmp-blocks: 
  rich rules:

# 2  
Old 09-19-2017
You probably have not removed the ssh service from the default zone
Code:
firewall-cmd --permanent --zone=public --remove-service=ssh
firewall-cmd --reload

# 3  
Old 09-19-2017
ssh was in there

So ran the below and reloaded and it made no difference

Code:
firewall-cmd --permanent --zone=public --remove-service=ssh

I did change the default zone to ABCinternal...may that is causing the problem?

Code:
firewall-cmd -get-default-zone
ABCinternal


Last edited by fishface; 09-19-2017 at 05:03 PM..
# 4  
Old 09-19-2017
Hmm, can you check all active zones, if service ssh or port 22/tcp is present somewhere? You can do this by either running
Code:
firewall-cmd --get-active-zones

and then for each zone listed
Code:
firewall-cmd --zone=xxx --list-protocols
firewall-cmd --zone=xxx --list-services

or by inspecting all xml-Files in /etc/firewalld/zones
# 5  
Old 09-19-2017
I have added the interface, it's also in defined /etc/sysconfig/network-scripts/ifcfg-ens192, thinking that might be the issue but it made no difference.

Code:
firewall-cmd --get-active-zones
ABCinternal
  interfaces: ens192
  sources: 192.168.1.10 192.168.1.99

Code:
firewall-cmd --zone=ABCinternal --list-protocols
firewall-cmd --zone=public --list-protocols
firewall-cmd --zone=internal --list-protocols
firewall-cmd --zone=drop --list-protocols
firewall-cmd --zone=trusted --list-protocols
firewall-cmd --zone=dmz --list-protocols
firewall-cmd --zone=home --list-protocols
firewall-cmd --zone=work --list-protocols
firewall-cmd --zone=external --list-protocols

The above produced no output

Code:
firewall-cmd --zone=ABCinternal --list-services
ssh
firewall-cmd --zone=public --list-services
dhcpv6-client
firewall-cmd --zone=internal --list-services
ssh mdns samba-client dhcpv6-client
firewall-cmd --zone=drop --list-services
no output
firewall-cmd --zone=trusted --list-services
no output
firewall-cmd --zone=dmz --list-services
dmz
firewall-cmd --zone=home --list-services
ssh mdns samba-client dhcpv6-client
firewall-cmd --zone=work --list-services
ssh dhcpv6-client
firewall-cmd --zone=external --list-services
ssh

Also /etc/firewalld/zones only has 2 zones

ABCinternal.xml
ABCinternal.xml.old
public.xml
public.xml.old
# 6  
Old 09-20-2017
You should remove any interface attributes from the ABCinternal zone or every ssh-connect arriving on one of the listed interfaces will be accepted.

I can't see any active services but ssh in your listings (because ABCinternal is the only active zone and it only accepts ssh). But let's say this machine is a webserver then you have to allow http in zone public in order for this to work.
# 7  
Old 09-20-2017
Currently, all I need is ssh, and only from those IPs, hence why I only have ssh listed under the ABCinternal zone.

Previously I have removed the interface from the ABCinternal zone, so it was as below, but it made no difference.

Code:
firewall-cmd --get-active-zones
ABCinternal
  interfaces: 
  sources: 192.168.1.10 192.168.1.99

As I see it, I have a single zone configured, ABCinternal, that is active, and should only allow the 2 source IPs listed to ssh in, but it allows any IP to ssh in. I'm obviously not "getting" something but not sure what!

Last edited by fishface; 09-20-2017 at 11:13 AM..
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