Mailinglist Archive: opensuse (1470 mails)

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Re: [opensuse] What is the meaning of these firewall log entries?
13.02.2016 06:18, John Andersen пишет:
On 02/12/2016 11:19 AM, Carlos E. R. wrote:
That's why I was interested in these firewall log entries. I know (now) that
it is not the
first time I have got caught by this issue of icmp, I opened it in the
firewall, then I forgot.

Are we sure that netconsole is involved at in in the icmp issue?

You only see the messages because your firewall blocks icmp.

No. He sees this message because other system blocks UDP

[SRC= DST= LEN=343 TOS=0x00 PREC=0x00 TTL=64
ID=3128 PROTO=UDP SPT=6666 DPT=6666 LEN=323 ]

Were you not blocking, the would just go through and you would never know.

DHCP servers ping before leasing an IP, just to make sure no one manually
assigned it. There are probably more legitimate uses for ping on your network
as well.

Its uncommon to block icmp on your LAN, but common to block it on your Public
facing Nic.

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