Anthony K
2021-May-01 04:15 UTC
[CentOS] ipforwarding between interfaces and firewall rules
On 26/4/21 8:42 am, R C wrote:> ... > for example; if I do "ping www.google.com"? I get a "ping > www.google.com: Name or service not known"? If I use? an IP address > (from www.google.com), it just works.Sometimes seeing the traffic flow reveals what's really going on. To that end, run command below on the firewall box: tcpdump -i any port 53 or port 5353 Then on the client, query www.google.com
Anthony K
2021-May-01 04:19 UTC
[CentOS] ipforwarding between interfaces and firewall rules
On 1/5/21 2:15 pm, Anthony K wrote:> On 26/4/21 8:42 am, R C wrote: >> ... >> for example; if I do "ping www.google.com"? I get a "ping >> www.google.com: Name or service not known"? If I use? an IP address >> (from www.google.com), it just works. > > Sometimes seeing the traffic flow reveals what's really going on. To > that end, run command below on the firewall box: tcpdump -i any port > 53 or port 5353 Then on the client, query www.google.com >That didn't format well at all - one more try: On firewall: tcpdump -l -n -i any port 53 or port 5353 --- On client: query www.google.com