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Message #02096
[Bug 1650489] Re: ufw broken on Linux Mint 17.3
Hi,
I tried it, and the result is
Jan 9 23:33:11 FSC-neu kernel: [ 119.986998] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:bc:05:43:ae:38:1a:08:00 SRC=192.168.1.254 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2
Jan 9 23:33:15 FSC-neu kernel: [ 124.063501] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:fb:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=57247 PROTO=2
Jan 9 23:34:07 FSC-neu kernel: [ 176.575247] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=146 TOS=0x00 PREC=0x00 TTL=64 ID=27304 PROTO=UDP SPT=5353 DPT=42937 LEN=126
Jan 9 23:34:07 FSC-neu kernel: [ 176.623963] [UFW ALLOW] IN= OUT=eth0 SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50220 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:07 FSC-neu kernel: [ 176.623982] [UFW ALLOW] IN=eth0 OUT= MAC= SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50220 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:07 FSC-neu kernel: [ 176.625233] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=41849 PROTO=UDP SPT=8612 DPT=42937 LEN=40
Jan 9 23:34:08 FSC-neu kernel: [ 177.133004] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=146 TOS=0x00 PREC=0x00 TTL=64 ID=21591 PROTO=UDP SPT=5353 DPT=42937 LEN=126
Jan 9 23:34:08 FSC-neu kernel: [ 177.175232] [UFW ALLOW] IN= OUT=eth0 SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50353 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:08 FSC-neu kernel: [ 177.175253] [UFW ALLOW] IN=eth0 OUT= MAC= SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50353 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:08 FSC-neu kernel: [ 177.176434] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=58754 PROTO=UDP SPT=8612 DPT=42937 LEN=40
Jan 9 23:34:08 FSC-neu kernel: [ 177.674191] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=146 TOS=0x00 PREC=0x00 TTL=64 ID=56849 PROTO=UDP SPT=5353 DPT=42937 LEN=126
Jan 9 23:34:08 FSC-neu kernel: [ 177.723215] [UFW ALLOW] IN= OUT=eth0 SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50448 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:08 FSC-neu kernel: [ 177.723232] [UFW ALLOW] IN=eth0 OUT= MAC= SRC=192.168.1.31 DST=224.0.0.1 LEN=44 TOS=0x00 PREC=0x00 TTL=1 ID=50448 DF PROTO=UDP SPT=42937 DPT=8612 LEN=24
Jan 9 23:34:08 FSC-neu kernel: [ 177.724294] [UFW BLOCK] IN=eth0 OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251 DST=192.168.1.31 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=26443 PROTO=UDP SPT=8612 DPT=42937 LEN=40
Still getting blocked...
Yours
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https://bugs.launchpad.net/bugs/1650489
Title:
ufw broken on Linux Mint 17.3
Status in Gufw:
New
Status in Linux Mint:
New
Status in ufw:
Incomplete
Bug description:
Hi,
on my Linux Mint 17.3 x64 Cinnamon, ufw appears to be broken (0.34~rc-
0ubuntu2).
Networking seemed to work alright, surfing was no problem, also FTP
and SSH worked. But not Bonjour, which I need to use the scanner that
is inside my Canon MX925. So I used gufw (14.04.2-0ubuntu1.2) to add
rules that allow packets sent to ports 8610 and 8612, and packets
coming from 5353 (Bonjour). But still, some of these packets get
blocked, according to syslog.
Looking deeper inside the matter, I realised that the default inbound
policy is deny. So surfing should not be possible, but it works
alright.
sudo ufw status verbose
Status: Aktiv
Protokollierung: on (medium)
Voreinstellung: reject (eingehend), allow (abgehend), disabled (gesendet)
Neue Profile: skip
Zu Aktion Von
-- ------ ---
8612 ALLOW IN Anywhere (log)
5353 ALLOW IN Anywhere (log)
8612 (v6) ALLOW IN Anywhere (v6) (log)
5353 (v6) ALLOW IN Anywhere (v6) (log)
8610 ALLOW OUT Anywhere (log)
8612 ALLOW OUT Anywhere (log)
8610 (v6) ALLOW OUT Anywhere (v6) (log)
8612 (v6) ALLOW OUT Anywhere (v6) (log)
Bonjour should be the only thing working, but in fact, it's the only
thing NOT working. So I looked at those predefined sets of rules that
ufw should come with, according to
http://www.larrytalkstech.com/ufw-the-linux-uncomplicated-firewall/
but most of the ones mentioned there are missing.
sudo ufw app list
Verfügbare Anwendungen:
CUPS
Samba
Only CUPS and Samba are known? Not even DNS or tcp/80 ? Since surfing
works alright, my guess is that ufw does not really work together with
iptables, which to my understanding is the "real firewall" that (g)ufw
is only a frontend for. So ufw does not show all rules that are in
force, and ufw does not correctly apply new rules at the correct
position in the chain, so they get defeated by the existing rules,
thus Bonjour gets broken.
Dec 15 14:00:30 FSC-neu kernel: [72537.358551] [UFW BLOCK] IN=eth0
OUT= MAC=90:1b:0e:18:56:e3:60:12:8b:46:ce:55:08:00 SRC=192.168.1.251
DST=192.168.1.31 LEN=146 TOS=0x00 PREC=0x00 TTL=64 ID=63636 PROTO=UDP
SPT=5353 DPT=36762 LEN=126
Thanks
Oliver
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References