• IP addresses

    From Chris Newman@21:1/5 to All on Wed Dec 29 13:22:44 2021
    HI,
    IIRC there is a way of finding out the IP addresses of devices connected
    to a RISC OS m/c but for the life of me I can't remember what it was or
    where I wrote it down. Can anyone help please?

    --
    Chris Newman

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  • From Theo@21:1/5 to Chris Newman on Wed Dec 29 15:14:38 2021
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI,
    IIRC there is a way of finding out the IP addresses of devices connected
    to a RISC OS m/c but for the life of me I can't remember what it was or
    where I wrote it down. Can anyone help please?

    Try *arp -a

    Theo

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  • From Chris Newman@21:1/5 to theom+news@chiark.greenend.org.uk on Wed Dec 29 16:07:18 2021
    In article <huk*67XCy@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI, IIRC there is a way of finding out the IP addresses of devices connected to a RISC OS m/c but for the life of me I can't remember
    what it was or where I wrote it down. Can anyone help please?

    Try *arp -a

    Or possibly *inetstat

    (*arp -a tells you the IP addresses of everything the machine knows
    about, *inetstat tells you what has open TCP connections right now or
    has recently closed, including their ports)

    Thanks, Theo. That was exciting. Lots of stuff to look at. Now to see
    what I recognize and what matches what. Much obliged.

    --
    Chris Newman

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  • From Theo@21:1/5 to Theo on Wed Dec 29 15:16:59 2021
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI,
    IIRC there is a way of finding out the IP addresses of devices connected
    to a RISC OS m/c but for the life of me I can't remember what it was or where I wrote it down. Can anyone help please?

    Try *arp -a

    Or possibly *inetstat

    (*arp -a tells you the IP addresses of everything the machine knows about, *inetstat tells you what has open TCP connections right now or has recently closed, including their ports)

    Theo

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  • From Martin@21:1/5 to Chris Newman on Wed Dec 29 16:46:04 2021
    In article <59a27e6d5ccvjazz@waitrose.com>,
    Chris Newman <cvjazz@waitrose.com> wrote:
    In article <huk*67XCy@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI, IIRC there is a way of finding out the IP addresses of
    devices connected to a RISC OS m/c but for the life of me I
    can't remember what it was or where I wrote it down. Can
    anyone help please?

    Try *arp -a

    Or possibly *inetstat

    (*arp -a tells you the IP addresses of everything the machine
    knows about, *inetstat tells you what has open TCP connections
    right now or has recently closed, including their ports)

    Thanks, Theo. That was exciting. Lots of stuff to look at. Now to
    see what I recognize and what matches what. Much obliged.

    The original question did not seem to clarify if you wanted the
    - WAN Internet IP that RISC OS apps are connected to
    *inetstat gives these
    - LAN local IP that RISC OS knows about
    *arp -a gives these
    *fwshow gives discs and hosts connected using ShareFS
    - LAN local IP that are connected to your network
    If you have a phone or tablet then WiFiMan or one of the many
    other similar apps can list all LAN devices. (iStuff may be more
    restricted)

    --
    Martin Avison
    Note that unfortunately this email address will become invalid
    without notice if (when) any spam is received.

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  • From druck@21:1/5 to Dave on Wed Dec 29 19:45:01 2021
    On 29/12/2021 19:26, Dave wrote:
    How confusing... RISC OS 6.20

    Here *arp -a Displays "route-sysctl-estimate"

    *inetstat Displays "kvm_nlist:"

    I have no idea what either of those mean?

    Try posting the full output.

    ---druck

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  • From Dave@21:1/5 to Chris Newman on Wed Dec 29 19:26:51 2021
    In article <59a27e6d5ccvjazz@waitrose.com>,
    Chris Newman <cvjazz@waitrose.com> wrote:
    In article <huk*67XCy@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI, IIRC there is a way of finding out the IP addresses of devices connected to a RISC OS m/c but for the life of me I can't remember
    what it was or where I wrote it down. Can anyone help please?

    Try *arp -a

    Or possibly *inetstat

    (*arp -a tells you the IP addresses of everything the machine knows
    about, *inetstat tells you what has open TCP connections right now or
    has recently closed, including their ports)

    Thanks, Theo. That was exciting. Lots of stuff to look at. Now to see
    what I recognize and what matches what. Much obliged.

    How confusing... RISC OS 6.20

    Here *arp -a Displays "route-sysctl-estimate"

    *inetstat Displays "kvm_nlist:"

    I have no idea what either of those mean?


    Not confusing is...

    *fwshow Displays

    "No remote nets

    Type 1: (Discs)
    *Name=Public Holder=192.168.0.4
    *Name=VRPCD-620BF Holder=192.168.0.4
    *Name=DRamDisc Holder=192.168.0.4
    Name=FVRPC Holder=192.168.0.3

    Type 2: (Printers)

    Type 5: (Hosts)
    *Name=Blackfan Holder=192.168.0.4"

    That is correct.

    Dave

    --

    Dave Triffid

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  • From Dave@21:1/5 to druck on Wed Dec 29 20:19:36 2021
    In article <sqids0$gfd$1@dont-email.me>,
    druck <news@druck.org.uk> wrote:
    On 29/12/2021 19:26, Dave wrote:
    How confusing... RISC OS 6.20

    Here *arp -a Displays "route-sysctl-estimate"

    *inetstat Displays "kvm_nlist:"

    I have no idea what either of those mean?

    Try posting the full output.

    ---druck

    That is all I get...

    What else should I get?

    Dave

    Straight out of the Task window.

    *arp -a
    route-sysctl-estimate
    *
    *inetstat
    InetStat: kvm_nlist:
    *

    --

    Dave Triffid

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  • From Theo@21:1/5 to Dave on Wed Dec 29 21:42:53 2021
    Dave <dave@triffid.co.uk> wrote:
    That is all I get...

    What else should I get?

    Dave

    Straight out of the Task window.

    *arp -a
    route-sysctl-estimate
    *
    *inetstat
    InetStat: kvm_nlist:
    *

    I think you're on VRPC? That doesn't have a RISC OS network stack, it just piggybacks on Windows'. Hence commands for talking to the RISC OS network stack don't work.

    Theo

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  • From Dave@21:1/5 to Theo on Thu Dec 30 07:29:25 2021
    In article <fuk*xwZCy@news.chiark.greenend.org.uk>,
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Dave <dave@triffid.co.uk> wrote:
    That is all I get...

    What else should I get?

    Dave

    Straight out of the Task window.

    *arp -a
    route-sysctl-estimate
    *
    *inetstat
    InetStat: kvm_nlist:
    *

    I think you're on VRPC? That doesn't have a RISC OS network stack, it
    just piggybacks on Windows'. Hence commands for talking to the RISC OS network stack don't work.

    Theo

    Yes indeed it is VRPC.

    I've now just run my old hardware SARPC (RISC OS 6.20) and get a different result for *arp -a

    *arp -a
    router (192.168.0.1) at e8:48: Redacted.
    faypc (192.168.0.3) at 94:de: Redacted.
    blackfan (192.168.0.4) at 1c:1b: Redacted.
    ? (192.168.0.255) at (incomplete)
    *
    *inetstat
    *
    *fwshow
    No remote nets

    Type 1: (Discs)
    *Name=Dave Holder=192.168.0.6
    Name=Public Holder=192.168.0.4
    Name=VRPCD-620BF Holder=192.168.0.4
    Name=DRamDisc Holder=192.168.0.4

    Type 2: (Printers)

    Type 5: (Hosts)
    *Name=dave Holder=192.168.0.6
    Name=Blackfan Holder=192.168.0.4
    *


    Dave

    --

    Dave Triffid

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  • From Chris Newman@21:1/5 to All on Thu Dec 30 13:52:48 2021
    In article <59a2d2d972dave@triffid.co.uk>, Dave <dave@triffid.co.uk>
    wrote:
    In article <fuk*xwZCy@news.chiark.greenend.org.uk>, Theo
    <theom+news@chiark.greenend.org.uk> wrote:
    Dave <dave@triffid.co.uk> wrote:
    That is all I get...

    What else should I get?

    Dave

    Straight out of the Task window.

    *arp -a route-sysctl-estimate * *inetstat InetStat: kvm_nlist: *

    I think you're on VRPC? That doesn't have a RISC OS network stack,
    it just piggybacks on Windows'. Hence commands for talking to the
    RISC OS network stack don't work.

    Theo

    Yes indeed it is VRPC.

    I've now just run my old hardware SARPC (RISC OS 6.20) and get a
    different result for *arp -a

    *arp -a router (192.168.0.1) at e8:48: Redacted. faypc (192.168.0.3) at 94:de: Redacted. blackfan (192.168.0.4) at 1c:1b: Redacted. ? (192.168.0.255) at (incomplete) * *inetstat * *fwshow No remote nets

    Oooer! I seem to have opened a little thread for discussion (AKA minnie
    can of worms).

    What does redacted mean? Is there a big black line through it like
    government documents?

    I also got some marked "incomplete". What does that mean?

    --
    Chris Newman

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  • From Theo@21:1/5 to Chris Newman on Thu Dec 30 14:20:18 2021
    Chris Newman <cvjazz@waitrose.com> wrote:
    Oooer! I seem to have opened a little thread for discussion (AKA minnie
    can of worms).

    What does redacted mean? Is there a big black line through it like
    government documents?

    I think that just means Dave removed some of the information to avoid
    posting the exact MAC addresses on his system (which aren't a major privacy risk in general, but fair enough)

    I also got some marked "incomplete". What does that mean?

    *arp -a just gives a dump of the ARP cache - the mappings of IPs to MACs
    that the machine has used recently.

    'Incomplete' means the system tried to do an ARP request for a particular IP but the ARP request failed. For example, you tried to talk to a machine
    that is turned off - you wanted to talk to 192.168.1.33 so your machine
    tried to work out what MAC address has that by issuing an ARP request. But
    the machine was turned off, so your machine opened the entry in the ARP
    table but nobody replied with a MAC address to fill it in. Similarly
    broadcast addresses won't have anyone reply to the ARP request because there isn't a real machine at that address.

    Theo

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  • From Dave@21:1/5 to Theo on Thu Dec 30 15:27:31 2021
    In article <guk*ia3Cy@news.chiark.greenend.org.uk>,
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    Oooer! I seem to have opened a little thread for discussion (AKA minnie
    can of worms).

    What does redacted mean? Is there a big black line through it like government documents?

    I think that just means Dave removed some of the information to avoid
    posting the exact MAC addresses on his system (which aren't a major
    privacy risk in general, but fair enough)

    I also got some marked "incomplete". What does that mean?

    *arp -a just gives a dump of the ARP cache - the mappings of IPs to MACs
    that the machine has used recently.

    'Incomplete' means the system tried to do an ARP request for a
    particular IP but the ARP request failed. For example, you tried to
    talk to a machine that is turned off - you wanted to talk to
    192.168.1.33 so your machine tried to work out what MAC address has that
    by issuing an ARP request. But the machine was turned off, so your
    machine opened the entry in the ARP table but nobody replied with a MAC address to fill it in. Similarly broadcast addresses won't have anyone
    reply to the ARP request because there isn't a real machine at that
    address.

    Theo

    Thanks Theo the precise answers.

    Dave

    --

    Dave Triffid

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  • From Dave@21:1/5 to Chris Newman on Thu Dec 30 15:39:37 2021
    In article <59a2f5f274cvjazz@waitrose.com>,
    Chris Newman <cvjazz@waitrose.com> wrote:
    In article <59a2d2d972dave@triffid.co.uk>, Dave <dave@triffid.co.uk>
    wrote:
    In article <fuk*xwZCy@news.chiark.greenend.org.uk>, Theo
    <theom+news@chiark.greenend.org.uk> wrote:
    Dave <dave@triffid.co.uk> wrote:
    That is all I get...

    What else should I get?

    Dave

    Straight out of the Task window.

    *arp -a route-sysctl-estimate * *inetstat InetStat: kvm_nlist: *

    I think you're on VRPC? That doesn't have a RISC OS network stack,
    it just piggybacks on Windows'. Hence commands for talking to the
    RISC OS network stack don't work.

    Theo

    Yes indeed it is VRPC.

    I've now just run my old hardware SARPC (RISC OS 6.20) and get a
    different result for *arp -a

    *arp -a router (192.168.0.1) at e8:48: Redacted.
    faypc (192.168.0.3) at 94:de: Redacted.
    blackfan (192.168.0.4) at 1c:1b: Redacted.
    (192.168.0.255) at (incomplete)

    Oooer! I seem to have opened a little thread for discussion (AKA minnie
    can of worms).

    What does redacted mean? Is there a big black line through it like
    government documents?

    I also got some marked "incomplete". What does that mean?

    Chris, Theo has answered concisely... but one expansion...

    It is somewhat difficult in an email to black line out some text/numerics,
    so to indicate I had removed some of the MAC data for each device
    (Security) I replaced the missing with "Redacted".

    Dave

    --

    Dave Triffid

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  • From Chris Newman@21:1/5 to All on Thu Dec 30 16:18:57 2021
    In article <59a2ffb984dave@triffid.co.uk>, Dave <dave@triffid.co.uk>
    wrote:


    What does redacted mean? Is there a big black line through it like government documents?

    I also got some marked "incomplete". What does that mean?

    Chris, Theo has answered concisely... but one expansion...

    It is somewhat difficult in an email to black line out some
    text/numerics, so to indicate I had removed some of the MAC data for
    each device (Security) I replaced the missing with "Redacted".

    I did ask tongue in cheek. I should have added a smiley. ;-)

    --
    Chris Newman

    --- SoupGate-Win32 v1.05
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  • From Chris Evans (CJE/4D)@21:1/5 to URL:mailto:News03@avisoft.f9.co.uk on Thu Jan 6 12:37:54 2022
    In article <59a281f9d7News03@avisoft.f9.co.uk>, Martin <URL:mailto:News03@avisoft.f9.co.uk> wrote:
    In article <59a27e6d5ccvjazz@waitrose.com>,
    Chris Newman <cvjazz@waitrose.com> wrote:
    In article <huk*67XCy@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote:
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Chris Newman <cvjazz@waitrose.com> wrote:
    HI, IIRC there is a way of finding out the IP addresses of
    devices connected to a RISC OS m/c but for the life of me I
    can't remember what it was or where I wrote it down. Can
    anyone help please?

    Try *arp -a

    Or possibly *inetstat

    (*arp -a tells you the IP addresses of everything the machine
    knows about, *inetstat tells you what has open TCP connections
    right now or has recently closed, including their ports)

    Thanks, Theo. That was exciting. Lots of stuff to look at. Now to
    see what I recognize and what matches what. Much obliged.

    The original question did not seem to clarify if you wanted the
    - WAN Internet IP that RISC OS apps are connected to
    *inetstat gives these
    - LAN local IP that RISC OS knows about
    *arp -a gives these
    *fwshow gives discs and hosts connected using ShareFS
    - LAN local IP that are connected to your network
    If you have a phone or tablet then WiFiMan or one of the many
    other similar apps can list all LAN devices. (iStuff may be more
    restricted)

    Also if you can get to the relevant page your router will give various information about what is connected to it.


    Chris Evans

    --

    ****** IGEPv5: The fastest RISC OS computer so far! *******
    ------------ http://www.cjemicros.co.uk/igepv5 ------------
    CJE Micro's 'Raspberry Pi & RISC OS Specialists'
    Tel: +44 (0)1903 523222
    chris@cjemicros.co.uk http://www.cjemicros.co.uk/
    Unit 16 Arunside Ind. Est., Fort Road, Littlehampton, W.Sussex BN17 7QU

    Don't let the urgent things in life, crowd out the important things!

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