[Ntop] how to monitor http and https only
Istvan Köpe
istvan at advancetech.ro
Thu Apr 29 15:16:07 CEST 2010
ntop can save a log with the new connections only and not the whole traffic?
On 28.04.2010 19:28, Gary Gatten wrote:
> Skip the Squid then, google around for "iptables logging reports reporting" and see if you can find something useful.
>
> Again, ntop will probably do what you need with some tweaking and add-on scripts, but not "out of the box" from what I can tell. I think the "Internet Domain" reports are your starting place with nTop.
>
> G
>
>
> -----Original Message-----
> From: ntop-bounces at listgateway.unipi.it [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan Köpe
> Sent: Wednesday, April 28, 2010 11:24 AM
> To: ntop at unipi.it
> Subject: Re: [Ntop] how to monitor http and https only
>
> I googled around and I could not find any article which confirms that
> https is usable without problems with squid as transparent proxy.
> Everybody is recommending in case of transparent proxy to not redirect
> 443 to squid.
>
>
> On 28.04.2010 18:48, Istvan Köpe wrote:
>
>> Maybe, but not as transparent proxy
>>
>> On 28.04.2010 17:42, Fabio Pardi wrote:
>>
>>> you need squid 2.5+ i guess
>>>
>>> http://www.comfsm.fm/computing/squid/FAQ-1.html#ss1.12
>>>
>>>
>>> Istvan Köpe wrote:
>>>
>>>> I just learned that squid doesn't handle https. So is not good for what
>>>> I need.
>>>>
>>>> On 28.04.2010 15:51, Gary Gatten wrote:
>>>>
>>>>> I'm sure iptables can log most everything as well. Someone has
>>>>> probably written an app to format the logs and summarize the data.
>>>>>
>>>>> ----- Original Message -----
>>>>> From:
>>>>> ntop-bounces at listgateway.unipi.it<ntop-bounces at listgateway.unipi.it>
>>>>> To: ntop at unipi.it<ntop at unipi.it>
>>>>> Sent: Wed Apr 28 07:37:52 2010
>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>
>>>>> Once I had contact with squid and than I realized that squid is a
>>>>> whole
>>>>> chapter in Linux... If is possible I prefer to not install any proxy.
>>>>>
>>>>> I.
>>>>>
>>>>> On 28.04.2010 13:55, Steve Clark wrote:
>>>>>
>>>>>
>>>>>> Or maybe something like squid proxy. I am pretty sure it keeps an
>>>>>> access.log that could provide
>>>>>> the info you are looking for.
>>>>>>
>>>>>> On 04/27/2010 05:08 PM, Gary Gatten wrote:
>>>>>>
>>>>>>
>>>>>>> Ah, I see.... You just want to see if the users are "surfing" or
>>>>>>> actually working? Not sure if nTop will give you this. The Domain
>>>>>>> report will have some of this info, and rrd may actually store this
>>>>>>> as well. I'm just not sure it will provide exactly what you seek.
>>>>>>> What about "IP -> Summary -> Internet Domain"?, then drill
>>>>>>> down
>>>>>>> from there? If this report will work for you, maybe run a script
>>>>>>> with several "wget" on the appropriate URL's and save those each
>>>>>>> night? Perhaps you could enable sticky hosts and then run a cron
>>>>>>> job
>>>>>>> that restarts nTop at midnight (or whenever) each night?
>>>>>>>
>>>>>>> Are you wanting something like "WebSense" - that records every url
>>>>>>> visited, the time of day, the time spent at each site, etc.? You
>>>>>>> may
>>>>>>> want to check out "OpenDNS". They offer similar service for
>>>>>>> tracking
>>>>>>> this type of info and it's not "too" expensive for small number of
>>>>>>> users. I'm sure there is Open Source stuff that will do this as
>>>>>>> well
>>>>>>> - I just don't know of any.
>>>>>>>
>>>>>>> nTop may be able to get what you want - it for sure will capture the
>>>>>>> data, I just don't know of a predefined "report" that will show
>>>>>>> exactly what you want. NTop is good at lots of things, but isn't a
>>>>>>> perfect fit for everything.
>>>>>>>
>>>>>>> Maybe someone else will have other ideas. In the mean time I
>>>>>>> recommend you play with nTop's options a little and see if you can
>>>>>>> get what you need without being too convoluted.
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: ntop-bounces at listgateway.unipi.it
>>>>>>> [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan Köpe
>>>>>>> Sent: Tuesday, April 27, 2010 3:47 PM
>>>>>>> To: ntop at unipi.it
>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>
>>>>>>> The restrictions are done with iptables. There are only 4 hosts with
>>>>>>> internet access(http and https only), 1 with full access(the
>>>>>>> manager)
>>>>>>> and 1 test machine with full access. The rest are limited to
>>>>>>> antivirus
>>>>>>> updates.
>>>>>>>
>>>>>>> I want to save which sites were visited by the users each day. I
>>>>>>> need 2
>>>>>>> type of reports: by local IP and by remote hosts.
>>>>>>>
>>>>>>> Istvan
>>>>>>>
>>>>>>> On 27.04.2010 23:35, Gary Gatten wrote:
>>>>>>>
>>>>>>>
>>>>>>>> With Sticky hosts, idle hosts are never purged from memory.
>>>>>>>> Therefore, every new host will take more and more until it runs
>>>>>>>> out. Depending on the number of hosts, I can't tell you if 256MB
>>>>>>>> will be enough or not. My guess is not.
>>>>>>>>
>>>>>>>> Maybe Wireshark is all you need? A capture filter will limit your
>>>>>>>> traffic to http (or whatever) and you can tell it to create a new
>>>>>>>> file every hour / 100MB / whatever. Then, some of the summary
>>>>>>>> reports may give the info you need. If you don't capture DNS
>>>>>>>> traffic you may have a hard time reconciling host ip's to urls, so
>>>>>>>> keep that in mind.
>>>>>>>>
>>>>>>>> If you're trying to solve a specific problem or answer a specific
>>>>>>>> question, perhaps post that?
>>>>>>>>
>>>>>>>> G
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: ntop-bounces at listgateway.unipi.it
>>>>>>>> [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan Köpe
>>>>>>>> Sent: Tuesday, April 27, 2010 3:29 PM
>>>>>>>> To: ntop at unipi.it
>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>
>>>>>>>> After all I don't even need graphs, but everywhere I looked,
>>>>>>>> everybody
>>>>>>>> is suggesting ntop, or maybe I'm not asking the right questions.
>>>>>>>>
>>>>>>>> What do you mean by "ntop memory usage continue to grow". The
>>>>>>>> system
>>>>>>>> running ntop is a piece of junk, with 256MB ram. Will it crash
>>>>>>>> within 24h?
>>>>>>>>
>>>>>>>> Istvan
>>>>>>>>
>>>>>>>> On 27.04.2010 23:05, Gary Gatten wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>> Sounds right. Beware: enabling sticky hosts will cause ntop memory
>>>>>>>>> usage to continue to grow until: ntop is restarted, or ntop
>>>>>>>>> crashes
>>>>>>>>> from a malloc error.
>>>>>>>>>
>>>>>>>>> There is probably a way to use "wget" and / or other tools to
>>>>>>>>> "download" reports from ntop and save them somewhere. Then maybe
>>>>>>>>> you could set idle purge for say... 70 minutes, and run this batch
>>>>>>>>> report every hour?
>>>>>>>>>
>>>>>>>>> I think I understand what you're trying to do as I often need the
>>>>>>>>> same thing. You may want to spend a few minutes looking at the
>>>>>>>>> "rrd" settings. There may be some combination of "Data to Dump"
>>>>>>>>> and "RRD Detail" that will do what you wish. I've played with
>>>>>>>>> these settings some, but it's been a long time so can't offer much
>>>>>>>>> guidance. There are several good docs on the web that give
>>>>>>>>> details
>>>>>>>>> on what these settings do. If you can get RRD to store the data
>>>>>>>>> you wish, you can then use the "Arbitrary Graph" option to fetch /
>>>>>>>>> display that data. My initial thought is rrd will NOT store
>>>>>>>>> "conversation" level info, but who knows - maybe somewhere in
>>>>>>>>> there
>>>>>>>>> you'll get what you need? You could start be enabling all rrd
>>>>>>>>> data
>>>>>>>>> sets at the "high" level.
>>>>>>>>>
>>>>>>>>> G
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: ntop-bounces at listgateway.unipi.it
>>>>>>>>> [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan
>>>>>>>>> Köpe
>>>>>>>>> Sent: Tuesday, April 27, 2010 2:47 PM
>>>>>>>>> To: ntop at unipi.it
>>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>>
>>>>>>>>> This means, if I want to see what web pages were opened by one
>>>>>>>>> specific
>>>>>>>>> user(local IP), I need to enable "sticky hosts" or I need to
>>>>>>>>> increase
>>>>>>>>> purge hosts to 12 hours, right?
>>>>>>>>>
>>>>>>>>> I'll try with sticky hosts. That seems to be the closest to what I
>>>>>>>>> need.
>>>>>>>>>
>>>>>>>>> Istvan
>>>>>>>>>
>>>>>>>>> On 27.04.2010 18:27, Gary Gatten wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> You may be speaking of two different issues:
>>>>>>>>>> 1.) How nTop determines which hosts are local and which are
>>>>>>>>>> remote
>>>>>>>>>> 2.) Idle host purge timers
>>>>>>>>>>
>>>>>>>>>> First, please make sure you specify "-m all your local network
>>>>>>>>>> ranges" on the command line. Or add via the GUI. This is the
>>>>>>>>>> only way ntop knows local from remote. Anything not defined as
>>>>>>>>>> local is considered remote.
>>>>>>>>>>
>>>>>>>>>> Next, the default idle host purge is 5 minutes. You have two
>>>>>>>>>> options that I know of:
>>>>>>>>>> 1.) Enable "sticky hosts" - which as implies hosts will
>>>>>>>>>> never
>>>>>>>>>> go away until you restart nTop. Only recommended in unique
>>>>>>>>>> environments.
>>>>>>>>>> 2.) Change the idle purge time in "globals-defines.h" and
>>>>>>>>>> recompile nTop.
>>>>>>>>>>
>>>>>>>>>> Not sure which settings over ride which. If you make a change to
>>>>>>>>>> the startup options, you must restart ntop and most/all recorded
>>>>>>>>>> traffic will be lost. If done by the GUI, some settings are
>>>>>>>>>> dynamic, I can't say for sure which ones. I think the GUI
>>>>>>>>>> settings are saved in the prefsCache.db file.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> -----Original Message----
>>>>>>>>>> From: ntop-bounces at listgateway.unipi.it
>>>>>>>>>> [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan
>>>>>>>>>> Köpe
>>>>>>>>>> Sent: Tuesday, April 27, 2010 10:06 AM
>>>>>>>>>> To: ntop at unipi.it
>>>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>>>
>>>>>>>>>> Even if I choose All protocols --> Traffic . I choose
>>>>>>>>>> Hosts:
>>>>>>>>>> All , I
>>>>>>>>>> can't see all the remote hosts. But for a while I could see some
>>>>>>>>>> remote
>>>>>>>>>> hosts which than disappeared. What is the effective time range
>>>>>>>>>> for
>>>>>>>>>> All
>>>>>>>>>> protocols --> Traffic ?
>>>>>>>>>> Where are the parameters saved if I use the web interface for
>>>>>>>>>> changing
>>>>>>>>>> the configuration(Admin-->Configure-->Startup options)?
>>>>>>>>>> I noticed that if I modify /etc/ntop.conf it overrides the web
>>>>>>>>>> config
>>>>>>>>>> settings. Is that right?
>>>>>>>>>> If I modify the /etc/ntop.conf, how can I make the settings
>>>>>>>>>> effective
>>>>>>>>>> without losing the recorded traffic?
>>>>>>>>>>
>>>>>>>>>> On 27.04.2010 17:45, Gary Gatten wrote:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> There's a startup arg to specify which network ranges are local,
>>>>>>>>>>> it might be -b? Check the man and make sure you have this
>>>>>>>>>>> configured correctly for your environment.
>>>>>>>>>>>
>>>>>>>>>>> ----- Original Message -----
>>>>>>>>>>> From:
>>>>>>>>>>> ntop-bounces at listgateway.unipi.it<ntop-bounces at listgateway.unipi.it>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> To: ntop at unipi.it<ntop at unipi.it>
>>>>>>>>>>> Sent: Tue Apr 27 09:38:42 2010
>>>>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>>>>
>>>>>>>>>>> Ok, I got confused. Ntop is set on my Centos router. All the
>>>>>>>>>>> internet
>>>>>>>>>>> traffic goes through it.
>>>>>>>>>>> I go on the web interface All protocols --> Traffic . I
>>>>>>>>>>> choose Hosts:
>>>>>>>>>>> Remote only and I see only some of the remote hosts. I don't
>>>>>>>>>>> understand.
>>>>>>>>>>> Where can I see all the remote hosts which were accessed today?
>>>>>>>>>>>
>>>>>>>>>>> Istvan
>>>>>>>>>>>
>>>>>>>>>>> On 26.04.2010 18:34, Gary Gatten wrote:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> You can't disable "everything", but with packet and protocol
>>>>>>>>>>>> filters, and by viewing specific reports - you can get pretty
>>>>>>>>>>>> close to what you need.
>>>>>>>>>>>>
>>>>>>>>>>>> ----- Original Message -----
>>>>>>>>>>>> From:
>>>>>>>>>>>> ntop-bounces at listgateway.unipi.it<ntop-bounces at listgateway.unipi.it>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> To: ntop at unipi.it<ntop at unipi.it>
>>>>>>>>>>>> Sent: Mon Apr 26 09:31:35 2010
>>>>>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for the hints. But there is still too much information.
>>>>>>>>>>>> All I want is:
>>>>>>>>>>>> - 192.168.0.xxx, between 08:00-14:00, accessed the following
>>>>>>>>>>>> sites: ...
>>>>>>>>>>>> - www.facebook.com, between 08:00-14:00, was accessed by the
>>>>>>>>>>>> following
>>>>>>>>>>>> local IP-s: ...
>>>>>>>>>>>>
>>>>>>>>>>>> I don't need the:
>>>>>>>>>>>> - Host Traffic Stats
>>>>>>>>>>>> - Packet Statistics
>>>>>>>>>>>> - Protocol Distribution
>>>>>>>>>>>> - TCP/UDP Recently Used Ports
>>>>>>>>>>>> - IP Service Stats: Client Role
>>>>>>>>>>>> - TCP/UDP - Traffic on Other Ports
>>>>>>>>>>>>
>>>>>>>>>>>> How can I do all these?
>>>>>>>>>>>>
>>>>>>>>>>>> Istvan
>>>>>>>>>>>>
>>>>>>>>>>>> On 26.04.2010 17:12, Gary Gatten wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> Good call. One can also restrict the displayed protocols with
>>>>>>>>>>>>> -p, all remaining traffic will be displayed as "other"
>>>>>>>>>>>>>
>>>>>>>>>>>>> ----- Original Message -----
>>>>>>>>>>>>> From:
>>>>>>>>>>>>> ntop-bounces at listgateway.unipi.it<ntop-bounces at listgateway.unipi.it>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> To: ntop at unipi.it<ntop at unipi.it>;
>>>>>>>>>>>>> ntop at listgateway.unipi.it<ntop at listgateway.unipi.it>
>>>>>>>>>>>>> Sent: Mon Apr 26 08:44:04 2010
>>>>>>>>>>>>> Subject: Re: [Ntop] how to monitor http and https only
>>>>>>>>>>>>>
>>>>>>>>>>>>> Have you taken a look at the manpages for ntop? On a unix
>>>>>>>>>>>>> system, the "-B" switch followed by a pcap expression will
>>>>>>>>>>>>> give
>>>>>>>>>>>>> you want you want.
>>>>>>>>>>>>>
>>>>>>>>>>>>> e.g
>>>>>>>>>>>>>
>>>>>>>>>>>>> ntop -d -w 8080 -B "port 80 or 443"
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> -----Original Message-----
>>>>>>>>>>>>> From: ntop-bounces at listgateway.unipi.it
>>>>>>>>>>>>> [mailto:ntop-bounces at listgateway.unipi.it] On Behalf Of Istvan
>>>>>>>>>>>>> Köpe
>>>>>>>>>>>>> Sent: Monday, April 26, 2010 9:40 AM
>>>>>>>>>>>>> To: ntop at listgateway.unipi.it
>>>>>>>>>>>>> Subject: [Ntop] how to monitor http and https only
>>>>>>>>>>>>>
>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>
>>>>>>>>>>>>> I just installed ntop and it gives me much more information I
>>>>>>>>>>>>> need. I
>>>>>>>>>>>>> would like to see only the traffic on ports 80 and 443.
>>>>>>>>>>>>> How can I do that?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Istvan
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> Ntop mailing list
>>>>>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> Ntop mailing list
>>>>>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> Ntop mailing list
>>>>>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> Ntop mailing list
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>>>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> Ntop mailing list
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>>>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
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>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Ntop mailing list
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>>>>>>>>>> _______________________________________________
>>>>>>>>>> Ntop mailing list
>>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Ntop mailing list
>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>> _______________________________________________
>>>>>>>>> Ntop mailing list
>>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Ntop mailing list
>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>> _______________________________________________
>>>>>>>> Ntop mailing list
>>>>>>>> Ntop at listgateway.unipi.it
>>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Ntop mailing list
>>>>>>> Ntop at listgateway.unipi.it
>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>> _______________________________________________
>>>>>>> Ntop mailing list
>>>>>>> Ntop at listgateway.unipi.it
>>>>>>> http://listgateway.unipi.it/mailman/listinfo/ntop
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>> Ntop mailing list
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>>>>> _______________________________________________
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>>>>>
>>>>>
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>>>> Ntop mailing list
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>>>>
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