Mailinglist Archive: opensuse (729 mails)

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Re: [opensuse] network manager only connects after 2nd or 3rd attempt
Op maandag 1 juni 2015 17:32:35 schreef Daniel Bauer:
Am 01.06.2015 um 16:22 schrieb Freek de Kruijf:

Maybe the firewall blocks the responses.

Can this be?
If it is the firewall shouldn’t it then block in general? Both times I
rebooted today, at beginning I did not have an internet connection, but
disconnecting and connecting again (in networkmanager) it worked

So reboot your system and see that you did not get an IP address. Please
send the output of the command "tail -30 /var/log/firewall".

here's the output:

meitli:~ # tail -30 /var/log/firewall
2015-06-01T17:13:33.499841+02:00 meitli kernel: [ 203.685506]
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255

So, it is not the firewall. Only IPv6 packets with SPT=5353 DPT=5353 get
blocked, which is harmless. See for
an explanation on the protocol.

From your previous message the conclusion is that either your DHCP requests do
not reach the DHCP server or the responses do not reach your system.

You can analyze the first reason by having a system connected to the Ethernet
next to your router and collecting broadcast packages, a DHCP request is a
broadcast, and see if they arrive in that system. On that analyzing system you
can use wireshark to collect packages.

Analyzing the second reason is quite complicated, too complicated to explain.
You need something like an intermediate Ethernet bridge that passes on the
packages, but also copies these packages for analysis.


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Freek de Kruijf

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