Groups > comp.os.linux.networking > #4218

Re: Need help with iptables and ftp

From	William Unruh <unruh@invalid.ca>
Newsgroups	comp.os.linux.networking
Subject	Re: Need help with iptables and ftp
Date	2018-08-29 12:13 +0000
Organization	A noiseless patient Spider
Message-ID	<pm62la$hhm$1@dont-email.me> (permalink)
References	<plq1fe$amg$1@dont-email.me> <slrnpoacer.u91.dan@xps-linux.djph.net> <slrnpoccb6.31ka.grahn+nntp@frailea.sa.invalid> <slrnpocr6o.u91.dan@xps-linux.djph.net>

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On 2018-08-29, Dan Purgert <dan@djph.net> wrote:
> Jorgen Grahn wrote:
>> On Tue, 2018-08-28, Dan Purgert wrote:
>>> T wrote:
>>>> Hi All,
>>>>
>>>> Fedora 28
>>>>
>>>> # uname -r
>>>> 4.17.12-200.fc28.x86_64
>>>>
>>>> Since switching from RHEL to Fedora 28, my iptables
>>>> no longer tracks the high ports used by ftp.
>>>
>>> I hope I didn't simply miss the discussion on it ... but why FTP in the
>>> first place?  
>>
>> I asked basically "why is something still using active FTP on your
>> systems, when mine haven't for a decade or so?" and I still wonder
>> about that.
>>
>>> It's not like anything's encrypted (unless you're using FTP/SSL?), so
>>> even if you're moving ports around and whatnot, it's not like someone
>>> can't simply be watching everything that gets transferred anyway --
>>> inclusive of username/password.
>>
>> There's anonymous FTP.  Hard to tell if some software on some system
>> of yours will want to use it.
>
> Sure, but until we get the answer of "why FTP", we're just making
> assumptions, and (at least in my case) hoping we're making the wrong
> ones.

It sounds to me like he has put a firewall ban on all higher ports. But
that also bans all passive ftp connections. So he wants to track his
machine's ftp responses on higher ports, so as not to ban all ftp (eg he
may be allowing annonymous ftp)


>
>

Thread

Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-24 15:39 -0700
  Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-24 16:11 -0700
  Re: Need help with iptables and ftp Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-08-25 07:23 +0000
    Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-25 23:13 -0700
      Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-08-26 11:35 +0200
        Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 14:05 -0700
          Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-27 00:02 +0000
            Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 17:11 -0700
              Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-27 02:00 +0000
                Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 19:37 -0700
                Re: Need help with iptables and ftp "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2018-08-26 22:59 -0400
                Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 20:42 -0700
                Re: Need help with iptables and ftp "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2018-08-27 00:29 -0400
                Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 22:06 -0700
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-27 09:47 +0000
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-03 20:47 +0200
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-27 09:44 +0000
                Re: Need help with iptables and ftp "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2018-08-27 06:17 -0400
                Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-27 12:21 -0700
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-03 20:55 +0200
                Re: Need help with iptables and ftp Scott Hemphill <hemphill@hemphills.net> - 2018-08-27 11:22 -0400
                Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-27 12:18 -0700
          Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 17:44 -0700
      Re: Need help with iptables and ftp T <T@invalid.invalid> - 2018-08-26 17:43 -0700
  Re: Need help with iptables and ftp Dan Purgert <dan@djph.net> - 2018-08-28 11:28 +0000
    Re: Need help with iptables and ftp Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-08-29 05:38 +0000
      Re: Need help with iptables and ftp Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-08-29 10:13 +0300
      Re: Need help with iptables and ftp Dan Purgert <dan@djph.net> - 2018-08-29 09:52 +0000
        Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-29 12:13 +0000
          Re: Need help with iptables and ftp Dan Purgert <dan@djph.net> - 2018-08-29 12:27 +0000
            Re: Need help with iptables and ftp "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2018-08-29 11:14 -0400
              Re: Need help with iptables and ftp Aragorn <thorongil@telenet.be> - 2018-08-29 23:15 +0200
              Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-08-30 10:35 +0200
                Re: Need help with iptables and ftp Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-08-30 13:16 +0000
                Re: Need help with iptables and ftp Richard Kettlewell <invalid@invalid.invalid> - 2018-08-30 16:15 +0100
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-08-30 18:42 +0200
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-31 00:31 +0000
                Re: Need help with iptables and ftp Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-08-31 05:49 +0000
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-08-31 12:48 +0200
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-31 22:11 +0000
                Re: Need help with iptables and ftp Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2018-09-01 09:56 +0300
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-01 16:14 +0200
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-09-04 18:00 +0200
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-04 20:36 +0200
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-09-05 10:25 +0200
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-05 20:30 +0200
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-09-06 00:03 +0200
                Re: Need help with iptables and ftp Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-01 15:56 +0200
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-09-01 19:18 +0000
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-09-04 18:01 +0200
                Re: Need help with iptables and ftp William Unruh <unruh@invalid.ca> - 2018-08-31 00:25 +0000
                Re: Need help with iptables and ftp "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2018-08-30 20:34 -0400
                Re: Need help with iptables and ftp Dan Purgert <dan@djph.net> - 2018-08-31 09:25 +0000
                Re: Need help with iptables and ftp Wouter Verhelst <w@uter.be> - 2018-08-31 12:50 +0200
                Re: Need help with iptables and ftp Dan Purgert <dan@djph.net> - 2018-08-31 11:13 +0000
                Re: Need help with iptables and ftp Allodoxaphobia <knock_yourself_out@example.net> - 2018-08-31 12:30 +0000

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