dhclient -P -6 ppp0 does not receive dhcp-server responses

Rob Janssen pe1chl at amsat.org
Wed May 19 14:19:26 UTC 2021

I think there is an error in your firewall.
You have "removed all rules for testing", but the policy is set to DROP.

# ip6tables -L -v -n -x
Chain INPUT (policy DROP 211 packets, 57041 bytes)
    pkts      bytes target     prot opt in     out     source               destination         

This means that ALL traffic will be dropped.

You need to do "ip6tables -P INPUT ACCEPT" and test again.


On 5/19/21 4:00 PM, Udo van den Heuvel wrote:
> Hello,
> We run fedora 34 on our boxes.
> Dhclient stopped receiving responses from dhcp-server.
> Dhclient only logs XMT steps.
> This happens even with the (ipv6) firewall disabled.
> Tcpdump shows the responses arriving.
> Because of this I created bug https://bugzilla.redhat.com/show_bug.cgi?id=1956209.
> How can I investigate this issue further and fix it?
> Kind regards,
> Udo

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