Simones-MacBook-Pro:nprobe simone$ ./nprobe -f "not host 10.0.0.1" -i en0 -n none --zmq tcp://*:5556 -b 2 [...] 15/Jan/2017 17:38:59 [nprobe.c:6031] Packet capture filter set to "not host 10.0.0.1" [...]
On Sun, Jan 15, 2017 at 5:07 PM, Gerhard Mourani <gmour...@prival.ca> wrote: > Simone, > > > > BPF is not supported for collector interfaces. If you want to use it > then specify it on the nProbe. > > Can you show me an example, because I'm not able to do it on nprobe with > the -f option. > > > Gerhard Mourani > ------------------------------ > *From:* Simone Mainardi <maina...@ntop.org> > *Sent:* January 15, 2017 9:55:58 AM > *To:* Gerhard Mourani > *Cc:* n...@unipi.it > *Subject:* Re: [Ntop] Excluding hosts or a subnet from being monitored > > Gerhard, > > On Fri, Jan 13, 2017 at 9:25 PM, Gerhard Mourani <gmour...@prival.ca> > wrote: > >> Simone, >> >> I found the problem: If you dont use the = sign on the filter parameter >> line, it doesn't see it. >> >> Doesn't work -> --packet-filter "ip and not proto ipv6 and not ether host >> ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 or 239.0.0.0/8) and not host >> 192.168.2.227" >> >> Work -> --packet-filter="ip and not proto ipv6 and not ether host >> ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 or 239.0.0.0/8) and not host >> 192.168.2.227" >> > > That is true, I have made a fix. > > The point is that when the filter is not seen, *ntopng doesn't say > anything from the command line*. Nevertheless, in all your emails, you were > sending us logs with ntopng showing "Packet capture filter set on ..." so > it was not possible to figure out the cause of the issue. I don't know > which logs you were sending but for sure they were not consistent with the > claimed behavior. Next time please make sure to post logs that are actually > representative. > > >> >> Also, if I've eth0 and tcp://127.0.0.1:5556 as my NIC, >> > > BPF is not supported for collector interfaces. If you want to use it then > specify it on the nProbe. > > >> it doesn't work, here the output: >> >> /usr/bin/ntopng /etc/ntopng/ntopng.conf >> 13/Jan/2017 15:20:15 [Prefs.cpp:715] Localhost HTTP user login disabled >> 13/Jan/2017 15:20:15 [Ntop.cpp:1121] Setting local networks to >> 192.168.2.0/24 >> 13/Jan/2017 15:20:15 [Redis.cpp:92] Successfully connected to redis >> 127.0.0.1:6379@0 >> [NDPI] addDefaultPort(): found duplicate for port 5061: overwriting it >> with new value >> [NDPI] addDefaultPort(): found duplicate for port 3001: overwriting it >> with new value >> 13/Jan/2017 15:20:15 [PcapInterface.cpp:85] Reading packets from >> interface eth0... >> 13/Jan/2017 15:20:15 [PcapInterface.cpp:254] *Packet capture filter on >> eth0 set to "ip and not proto ipv6 and not ether host ff:ff:ff:ff:ff:ff and >> not net (224.0.0.0/8 <http://224.0.0.0/8> or 239.0.0.0/8 >> <http://239.0.0.0/8>) and not host 192.168.2.227"* >> 13/Jan/2017 15:20:15 [Ntop.cpp:1267] Registered interface eth0 [id: 0] >> [NDPI] addDefaultPort(): found duplicate for port 5061: overwriting it >> with new value >> [NDPI] addDefaultPort(): found duplicate for port 3001: overwriting it >> with new value >> 13/Jan/2017 15:20:15 [CollectorInterface.cpp:226] *ERROR: No filter can >> be set on a collector interface. Ignored ip and not proto ipv6 and not >> ether host ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 <http://224.0.0.0/8> >> or 239.0.0.0/8 <http://239.0.0.0/8>) and not host 192.168.2.227* >> 13/Jan/2017 15:20:15 [Ntop.cpp:1267] Registered interface tcp:// >> 127.0.0.1:5556 [id: 1] >> 13/Jan/2017 15:20:15 [Ntop.cpp:1279] Registered interface view eth0 [id: >> 0] >> 13/Jan/2017 15:20:15 [Ntop.cpp:1279] Registered interface view tcp:// >> 127.0.0.1:5556 [id: 1] >> 13/Jan/2017 15:20:15 [main.cpp:255] PID stored in file >> /var/run/ntopng/ntopng.pid >> 13/Jan/2017 15:20:15 [Utils.cpp:341] User changed to ntopng >> 13/Jan/2017 15:20:15 [HTTPserver.cpp:509] Web server dirs >> [/usr/share/ntopng/httpdocs][/usr/share/ntopng/scripts] >> 13/Jan/2017 15:20:15 [HTTPserver.cpp:515] HTTPS server listening on port >> 3001 >> 13/Jan/2017 15:20:15 [main.cpp:295] Working directory: /var/lib/nst/ntopng >> 13/Jan/2017 15:20:15 [main.cpp:297] Scripts/HTML pages directory: >> /usr/share/ntopng >> 13/Jan/2017 15:20:15 [Ntop.cpp:271] Welcome to ntopng x86_64 v.2.4.161019 >> - (C) 1998-2016 ntop.org >> 13/Jan/2017 15:20:15 [Ntop.cpp:276] Built on CentOS release 6.8 (Final) >> 13/Jan/2017 15:20:15 [PeriodicActivities.cpp:53] Started periodic >> activities loop... >> 13/Jan/2017 15:20:15 [RuntimePrefs.cpp:34] Dumping alerts into syslog >> 13/Jan/2017 15:20:15 [Ntop.cpp:531] Adding 192.168.2.0/24 as IPv4 local >> network for eth0 >> 13/Jan/2017 15:20:15 [Ntop.cpp:561] Adding fe80::20c:29ff:fe83:c98e/64 as >> IPv6 local network for eth0 >> 13/Jan/2017 15:20:15 [NetworkInterface.cpp:1538] Started packet polling >> on interface eth0 [id: 0]... >> 13/Jan/2017 15:20:15 [NetworkInterface.cpp:1538] Started packet polling >> on interface tcp://127.0.0.1:5556 [id: 1]... >> 13/Jan/2017 15:20:15 [CollectorInterface.cpp:104] Collecting flows on >> tcp://127.0.0.1:5556 [ntopng->nprobe] >> 13/Jan/2017 15:20:16 [NetworkInterface.cpp:1058] Invalid packet received >> [len: 2934][MTU: 1518]. >> 13/Jan/2017 15:20:16 [NetworkInterface.cpp:1059] WARNING: If you have >> TSO/GRO enabled, please disable it >> 13/Jan/2017 15:20:16 [NetworkInterface.cpp:1061] WARNING: Use: sudo >> ethtool -K eth0 gro off gso off tso off >> 13/Jan/2017 15:21:05 [main.cpp:37] Shutting down... >> 13/Jan/2017 15:21:05 [Redis.cpp:60] Redis has disconnected: >> reconnecting... >> Killed >> >> Gerhard, >> >> On Jan 13, 2017, at 3:00 PM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerhard, both. >> >> Even if I put the filter in a conf file it works: >> >> deri@centos6 203> cat /tmp/test.conf >> -i=eth0 >> --packet-filter="ip and not proto ipv6 and not ether host >> ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 or 239.0.0.0/8) and not host >> 192.168.2.109" >> --community= >> >> deri@centos6 204> sudo /usr/local/bin/ntopng /tmp/test.conf >> 13/Jan/2017 21:00:00 [Ntop.cpp:1121] Setting local networks to >> 127.0.0.0/8 >> 13/Jan/2017 21:00:00 [Redis.cpp:92] Successfully connected to redis >> 127.0.0.1:6379@0 >> 13/Jan/2017 21:00:01 [PcapInterface.cpp:85] Reading packets from >> interface eth0... >> 13/Jan/2017 21:00:01 [PcapInterface.cpp:254] Packet capture filter on >> eth0 set to "ip and not proto ipv6 and not ether host ff:ff:ff:ff:ff:ff and >> not net (224.0.0.0/8 or 239.0.0.0/8) and not host 192.168.2.109" >> >> >> >> >> On Thu, Jan 12, 2017 at 2:08 PM, Gerhard Mourani <gmour...@prival.ca> w >> rote: >> Simone, >> >> Did you run ntopng with the filter directly from the command line or via >> the configuration file? I think the problem happens when the filter is in >> the configuration file and you run ntopng to read it in this file. >> >> Gerhard, >> >> >> On Jan 11, 2017, at 5:13 PM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerhard, >> >> I've just tried to reproduce on centos6. The filter is working properly. >> I also tried to exclude the ntopng host and it works. So the only >> additional suggestion I have is to try and update ntopng to the latest >> stable. >> >> Regards >> >> On Tue, Jan 10, 2017 at 10:23 PM, Gerhard Mourani <gmour...@prival.ca> w >> rote: >> > The point here is that the filter doesn't contain any clause that >> matches host 10.0.0.39 ... >> Because, I've changed 10.0.0.39 for 192.168.2.227 for the test. >> >> Here the one in prod with 10.0.0.39: >> >> [root@ntpprod ~]# /usr/bin/ntopng -i eth3 --packet-filter="ip and not >> proto ipv6 and not ether host ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 >> or 239.0.0.0/8) and not host 10.0.0.39" >> 10/Jan/2017 16:22:02 [Ntop.cpp:1121] Setting local networks to >> 127.0.0.0/8 >> 10/Jan/2017 16:22:02 [Redis.cpp:92] Successfully connected to redis >> 127.0.0.1:6379@0 >> 10/Jan/2017 16:22:02 [PcapInterface.cpp:85] Reading packets from >> interface eth3... >> 10/Jan/2017 16:22:02 [PcapInterface.cpp:254] Packet capture filter on >> eth3 set to "ip and not proto ipv6 and not ether host ff:ff:ff:ff:ff:ff and >> not net (224.0.0.0/8 or 239.0.0.0/8) and not host 10.0.0.39" >> 10/Jan/2017 16:22:02 [Ntop.cpp:1267] Registered interface eth3 [id: 2] >> 10/Jan/2017 16:22:02 [Ntop.cpp:1279] Registered interface view eth3 [id: >> 2] >> 10/Jan/2017 16:22:02 [main.cpp:255] PID stored in file /var/run/ntopng.pid >> 10/Jan/2017 16:22:02 [Utils.cpp:341] User changed to nobody >> 10/Jan/2017 16:22:02 [HTTPserver.cpp:466] Please read >> https://github.com/ntop/ntopng/blob/dev/doc/README.SSL if you want to >> enable SSL. >> 10/Jan/2017 16:22:02 [HTTPserver.cpp:509] Web server dirs >> [/usr/share/ntopng/httpdocs][/usr/share/ntopng/scripts] >> 10/Jan/2017 16:22:02 [HTTPserver.cpp:512] HTTP server listening on port >> 3000 >> 10/Jan/2017 16:22:02 [main.cpp:295] Working directory: /var/tmp/ntopng >> 10/Jan/2017 16:22:02 [main.cpp:297] Scripts/HTML pages directory: >> /usr/share/ntopng >> 10/Jan/2017 16:22:02 [Ntop.cpp:271] Welcome to ntopng x86_64 v.2.4.161013 >> - (C) 1998-2016 ntop.org >> 10/Jan/2017 16:22:02 [Ntop.cpp:276] Built on CentOS release 6.8 (Final) >> 10/Jan/2017 16:22:02 [PeriodicActivities.cpp:53] Started periodic >> activities loop... >> 10/Jan/2017 16:22:02 [RuntimePrefs.cpp:34] Dumping alerts into syslog >> 10/Jan/2017 16:22:02 [Ntop.cpp:531] Adding 169.254.0.0/16 as IPv4 local >> network for eth3 >> 10/Jan/2017 16:22:02 [Ntop.cpp:561] Adding fe80::250:56ff:fe90:7661/64 as >> IPv6 local network for eth3 >> 10/Jan/2017 16:22:02 [NetworkInterface.cpp:1538] Started packet polling >> on interface eth3 [id: 2]... >> >> Gerhard, >> >> On Jan 10, 2017, at 4:17 PM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerard, >> >> >> On Tue, Jan 10, 2017 at 10:13 PM, Gerhard Mourani <gmour...@prival.ca> w >> rote: >> Simone, >> >> Here when launched from command line: >> >> [root@ntptest plugins]# /usr/bin/ntopng -i eth0 --packet-filter="ip and >> not proto ipv6 and not ether host ff:ff:ff:ff:ff:ff and not net ( >> 224.0.0.0/8 or 239.0.0.0/8) and not host (192.168.2.227)" >> >> OK, so the filter is properly parsed. I went back through this thread and >> found that you complained that >> >> > "The issue is that even if 10.0.0.39 is filtered to be excluded, it >> appears in the view of top hosts.," >> >> The point here is that the filter doesn't contain any clause that matches >> host 10.0.0.39 ... >> >> 10/Jan/2017 16:10:46 [Ntop.cpp:1121] Setting local networks to >> 127.0.0.0/8 >> 10/Jan/2017 16:10:46 [Redis.cpp:92] Successfully connected to redis >> 127.0.0.1:6379@0 >> 10/Jan/2017 16:10:46 [PcapInterface.cpp:85] Reading packets from >> interface eth0... >> 10/Jan/2017 16:10:46 [PcapInterface.cpp:254] Packet capture filter on >> eth0 set to "ip and not proto ipv6 and not ether host ff:ff:ff:ff:ff:ff >> and not net (224.0.0.0/8 or 239.0.0.0/8) and not host (192.168.2.227)" >> 10/Jan/2017 16:10:46 [Ntop.cpp:1267] Registered interface eth0 [id: 0] >> 10/Jan/2017 16:10:46 [Ntop.cpp:1279] Registered interface view eth0 [id: >> 0] >> 10/Jan/2017 16:10:46 [main.cpp:255] PID stored in file /var/run/ntopng.pid >> 10/Jan/2017 16:10:46 [Utils.cpp:341] User changed to nobody >> 10/Jan/2017 16:10:46 [HTTPserver.cpp:466] Please read >> https://github.com/ntop/ntopng/blob/dev/doc/README.SSL if you want to >> enable SSL. >> 10/Jan/2017 16:10:46 [HTTPserver.cpp:509] Web server dirs >> [/usr/share/ntopng/httpdocs][/usr/share/ntopng/scripts] >> 10/Jan/2017 16:10:46 [HTTPserver.cpp:512] HTTP server listening on port >> 3000 >> 10/Jan/2017 16:10:46 [main.cpp:295] Working directory: /var/tmp/ntopng >> 10/Jan/2017 16:10:46 [main.cpp:297] Scripts/HTML pages directory: >> /usr/share/ntopng >> 10/Jan/2017 16:10:46 [Ntop.cpp:271] Welcome to ntopng x86_64 v.2.4.161019 >> - (C) 1998-2016 ntop.org >> 10/Jan/2017 16:10:46 [Ntop.cpp:276] Built on CentOS release 6.8 (Final) >> 10/Jan/2017 16:10:46 [PeriodicActivities.cpp:53] Started periodic >> activities loop... >> 10/Jan/2017 16:10:46 [RuntimePrefs.cpp:34] Dumping alerts into syslog >> 10/Jan/2017 16:10:46 [Ntop.cpp:531] Adding 192.168.2.0/24 as IPv4 local >> network for eth0 >> 10/Jan/2017 16:10:46 [Ntop.cpp:561] Adding fe80::20c:29ff:fe83:c98e/64 as >> IPv6 local network for eth0 >> 10/Jan/2017 16:10:46 [NetworkInterface.cpp:1538] Started packet polling >> on interface eth0 [id: 0]... >> 10/Jan/2017 16:10:53 [NetworkInterface.cpp:1058] Invalid packet received >> [len: 1804][MTU: 1518]. >> 10/Jan/2017 16:10:53 [NetworkInterface.cpp:1059] WARNING: If you have >> TSO/GRO enabled, please disable it >> 10/Jan/2017 16:10:53 [NetworkInterface.cpp:1061] WARNING: Use: sudo >> ethtool -K eth0 gro off gso off tso off >> >> Seem that the filter passed but still can see IP 192.168.2.227 on my list! >> >> Gerhard, >> >> >> On Jan 10, 2017, at 4:04 PM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerhard, >> >> From the logs I can't see anything that confirms ntopng has read/parsed >> the bpf filter specified. It looks like the filter is ignored. I am >> not sure those logs contain the full output, though. >> >> Can you please run ntopng in foreground and paste the output? Simply call >> /usr/local/bin/ntopng /etc/ntopng/ntopng.conf >> >> Regards, >> Simone >> >> On Mon, Jan 9, 2017 at 8:46 PM, Gerhard Mourani <gmour...@prival.ca> >> wrote: >> Configuration: >> --interface tcp://127.0.0.1:5556 >> --packet-filter "ip and not proto ipv6 and not ether host >> ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 or 239.0.0.0/8) and not host >> 10.0.0.39" >> --local-networks 10.0.0.0/24,192.168.2.0/24 >> --daemon >> --user ntopng >> --pid /var/run/ntopng/ntopng.pid >> --http-port 0 >> --https-port 3001 >> --data-dir /var/lib/nst/ntopng >> --dns-mode 1 >> --disable-autologout >> --disable-login 0 >> --sticky-hosts none >> --http-prefix /ntopng >> --ndpi-protocols /etc/ntopng/protos.txt >> >> Log file: >> 09/Jan/2017 14:43:49 [Ntop.cpp:1121] Setting local networks to >> 10.0.0.0/24,192.168.2.0/24 >> 09/Jan/2017 14:43:49 [Redis.cpp:92] Successfully connected to redis >> 127.0.0.1:6379@0 >> 09/Jan/2017 14:43:49 [Ntop.cpp:1095] Parent process is exiting (this is >> normal) >> 09/Jan/2017 14:43:49 [Ntop.cpp:1267] Registered interface tcp:// >> 127.0.0.1:5556 [id: 1] >> 09/Jan/2017 14:43:49 [Ntop.cpp:1279] Registered interface view tcp:// >> 127.0.0.1:5556 [id: 1] >> 09/Jan/2017 14:43:49 [main.cpp:255] PID stored in file >> /var/run/ntopng/ntopng.pid >> 09/Jan/2017 14:43:49 [Utils.cpp:341] User changed to ntopng >> 09/Jan/2017 14:43:49 [HTTPserver.cpp:509] Web server dirs >> [/usr/share/ntopng/httpdocs][/usr/share/ntopng/scripts] >> 09/Jan/2017 14:43:49 [HTTPserver.cpp:515] HTTPS server listening on port >> 3001 >> 09/Jan/2017 14:43:49 [main.cpp:295] Working directory: /var/lib/nst/ntopng >> 09/Jan/2017 14:43:49 [main.cpp:297] Scripts/HTML pages directory: >> /usr/share/ntopng >> 09/Jan/2017 14:43:49 [Ntop.cpp:271] Welcome to ntopng x86_64 v.2.4.161013 >> - (C) 1998-2016 ntop.org >> 09/Jan/2017 14:43:49 [Ntop.cpp:276] Built on CentOS release 6.8 (Final) >> 09/Jan/2017 14:43:49 [PeriodicActivities.cpp:53] Started periodic >> activities loop... >> 09/Jan/2017 14:43:49 [RuntimePrefs.cpp:34] Dumping alerts into syslog >> 09/Jan/2017 14:43:49 [NetworkInterface.cpp:1538] Started packet polling >> on interface tcp://127.0.0.1:5556 [id: 1]... >> 09/Jan/2017 14:43:50 [CollectorInterface.cpp:104] Collecting flows on >> tcp://127.0.0.1:5556 [ntopng->nprobe] >> >> Gerhard, >> >> On Jan 9, 2017, at 11:26 AM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerhard, please attach the configuration used and the full ntopng console >> output (or log file). >> >> On Mon, Jan 9, 2017 at 2:24 PM, Gerhard Mourani <gmour...@prival.ca> >> wrote: >> Simone, >> >> The issue is that even if 10.0.0.39 is filtered to be excluded, it >> appears in the view of top hosts. Also, the IP 0.0.0.0 appaers and I >> don't have any idea about what it is? >> >> >> >> GERHARD MOURANI | Spécialiste Telecom – Concepteur Logiciel >> 450 761-9973 p634 | gmour...@prival.ca >> 9935, rue de Châteauneuf, bureau 120, Brossard, Québec, J4Z 3V4 >> Québec 418 907-8356 | Ottawa 613 689-1539 | Toronto 416 645-5626 >> facebook.com/Prival-230867980323343 >> linkedin.com/company/prival >> >> >> >> On Jan 8, 2017, at 5:36 AM, Simone Mainardi <maina...@ntop.org> wrote: >> >> Gerhard, >> >> The filter is correct and properly parsed by ntopng. So what is the issue >> you are experiencing? >> >> Simone >> >> On Thu, Jan 5, 2017 at 7:58 PM, Gerhard Mourani <gmour...@prival.ca> >> wrote: >> This doesn't work for me, I'm using the following parameters to exclude >> 10.0.0.39 which is my ntopng server IP: >> --packet-filter "ip and not proto ipv6 and not ether host >> ff:ff:ff:ff:ff:ff and not net (224.0.0.0/8 or 239.0.0.0/8) and not host >> 10.0.0.39" >> >> Gerhard, >> >> On Jan 5, 2017, at 12:09 PM, brett.sti...@cargocarriers.co.zw wrote: >> >> Thank you Simone. >> >> I will try that tomorrow morning. >> >> Much appreciated. >> >> >> >> On January 5, 2017 6:40:25 PM GMT+02:00, Simone Mainardi < >> maina...@ntop.org> wrote: >> >> Brett, the filter is not complete. If you want to exclude 10.0.50.246 >> set: >> >> --packet-filter="not host 10.0.50.246" >> >> If you look at the ntopng output you will see if the filter is parsed >> correctly. >> >> >> >> >> On Thu, Jan 5, 2017 at 4:05 PM, Brett Stiell (CCIH) < >> brett.sti...@cargocarriers.co.zw> wrote: >> >> Hi there. >> >> >> >> Thanks for getting back to me >> >> >> >> This is the contents of my ntopng.start file:- >> >> >> >> -G=/var/run/ntopng.pid >> >> --daemon= >> >> --local-networks="10.0.50.0/25,10.0.50.128/26,10.0.50.193/30" >> >> --packet-filter 10.0.50.246 >> >> -m "10.0.50.0/25,10.0.50.128/26,10.0.50.193/30" >> >> --track-local-hosts >> >> >> >> Regards, >> >> >> >> Brett >> >> >> >> *From:* Simone Mainardi [mailto:maina...@ntop.org] >> *Sent:* Thursday, January 05, 2017 3:26 PM >> *To:* n...@unipi.it >> *Cc:* ntop mailing list >> *Subject:* Re: [Ntop] Excluding hosts or a subnet from being >> >> monitored >> >> >> >> >> Hi, >> >> >> >> --packet-filter is the proper way to do that. Can you please report >> >> the >> >> exact filter you specified? Also check (and paste) ntopng output. >> >> ntopng >> >> prints a confirmation message if it has successfully parsed the >> >> filter. >> >> >> >> >> Regards >> >> Simone >> >> >> >> On Thu, Jan 5, 2017 at 11:14 AM, Brett Stiell (CCIH) < >> brett.sti...@cargocarriers.co.zw> wrote: >> >> Hi. >> >> >> >> Is there any way to exclude a subnet or a range of hosts from being >> monitored and appearing on the dashboard etc. >> >> >> >> Our servers are in a specific IP range and I am not interested in >> receiving their usage data. >> >> >> >> I tried –B and –packet-filter and “not” but they don’t seem to work. >> >> >> >> Thanks >> >> >> _______________________________________________ >> Ntop mailing list >> Ntop@listgateway.unipi.it >> http://listgateway.unipi.it/mailman/listinfo/ntop >> >> >> >> >> -- >> Sent from my Android device with Email Mail. Please excuse my >> brevity._______________________________________________ >> Ntop mailing list >> Ntop@listgateway.unipi.it >> http://listgateway.unipi.it/mailman/listinfo/ntop >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >
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