Re: Change ip address -

2015-10-09 Thread Wolfgang S. Rupprecht

Gordon Messmer  writes:
> On 10/08/2015 11:21 PM, Wolfgang S. Rupprecht wrote:
>> Hacking routes as one of the other replies suggested will only solve
>> half the problem.  The packet gets flung in the right direction.  The
>> problem is that the return packet won't be accepted.  In fact the arp
>> reply won't even happen.
>
> That's not quite correct.  The problem is not that the packets
> wouldn't be accepted by your client, or that your client would not
> reply to ARP requests.  The Buffalo device at 1.1.1.1 would accept
> packets from your client (unless rp_filter is enabled and it had no
> default route, but let's ignore that), but it would lack a route back
> to the client.  The Buffalo device would never send an ARP request,
> nor would it send packets in return.

Yea, I realized that after sending off the msg.  It would never even
send that arp request because it wouldn't see the src address as a local
network hence no arp.

-wolfgang

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Re: Change ip address -

2015-10-09 Thread Gordon Messmer

On 10/08/2015 11:21 PM, Wolfgang S. Rupprecht wrote:

Hacking routes as one of the other replies suggested will only solve
half the problem.  The packet gets flung in the right direction.  The
problem is that the return packet won't be accepted.  In fact the arp
reply won't even happen.


That's not quite correct.  The problem is not that the packets wouldn't 
be accepted by your client, or that your client would not reply to ARP 
requests.  The Buffalo device at 1.1.1.1 would accept packets from your 
client (unless rp_filter is enabled and it had no default route, but 
let's ignore that), but it would lack a route back to the client.  The 
Buffalo device would never send an ARP request, nor would it send 
packets in return.

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Re: Change ip address -

2015-10-08 Thread Wolfgang S. Rupprecht

Bob Goodwin  writes:
> I have a device that when reset requires I set my Fedora-22 computer
> to the address 1.1.1.2 in order that I can access it at 1.1.1.1. with
> my Firefox browser.

# allow us to talk to our zoom modem at 192.168.100.1/24
/usr/sbin/ip addr add 192.168.100.2/24 dev eth0.2

Hacking routes as one of the other replies suggested will only solve
half the problem.  The packet gets flung in the right direction.  The
problem is that the return packet won't be accepted.  In fact the arp
reply won't even happen.   Assigning the appropriate interface a second
address will take care of both the outgoing and incoming packet.   

Ignore the funny name of the ethernet dev.  This is actually on an
OpenWRT router.

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Re: Change ip address -

2015-10-07 Thread Cameron Simpson

On 06Oct2015 22:27, Gordon Messmer  wrote:

On 10/06/2015 05:06 PM, Cameron Simpson wrote:
Rick gave a nightmarishly complex answer, as did several others. It might 
work, but I'm not sure I'd call it reasonable. Bob only needed a temporary 
config, so the reasonable thing to do is to add an "eth0:0" with the right 
addressing as already suggested using the "ifconfig" or "ip" commands.


Yeah, he suggested that.

https://lists.fedoraproject.org/pipermail/users/2015-October/465478.html

If you want this to just be temporary, you could (as root):
ifconfig  1.1.1.2 netmask 255.255.255.0


Hmm, I had thought it was you. [Digs back through the thread...] Aha, yes Rick 
also suggested the direct approach.


Rick, I apologise.

I think my point becomes that all these things involving config files or 
special tools like Network Mangler are (a) overkill for a small problem, (b) 
indirect, not making very clear what underlying change is necessary and (c) 
won't work on other platforms (i.e. non RH, Centos, Fedora).


Whereas the ifconfig is: simple, immediate, says exactly what is going on and 
nothing else and will also work on any other Linux box and with only the most 
trivial of changes, any other UNIX system.


Cheers,
Cameron Simpson 
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Re: Change ip address -

2015-10-06 Thread Gordon Messmer

On 10/06/2015 05:06 PM, Cameron Simpson wrote:


Rick gave a nightmarishly complex answer, as did several others. It 
might work, but I'm not sure I'd call it reasonable. Bob only needed a 
temporary config, so the reasonable thing to do is to add an "eth0:0" 
with the right addressing as already suggested using the "ifconfig" or 
"ip" commands.


Yeah, he suggested that.

https://lists.fedoraproject.org/pipermail/users/2015-October/465478.html

If you want this to just be temporary, you could (as root):
ifconfig  1.1.1.2 netmask 255.255.255.0


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Re: Change ip address -

2015-10-06 Thread Cameron Simpson

On 06Oct2015 12:05, Gordon Messmer  wrote:

On 10/06/2015 08:42 AM, Bob Goodwin wrote:
I've saved this for future use, too bad you weren't here yesterday 
...


Rick gave a reasonable response.  Could have been improved to not 
interfere with regular network access, but I thought it was good enough.


Rick gave a nightmarishly complex answer, as did several others. It might work, 
but I'm not sure I'd call it reasonable. Bob only needed a temporary config, so 
the reasonable thing to do is to add an "eth0:0" with the right addressing as 
already suggested using the "ifconfig" or "ip" commands. It is _direct_! All 
this other guff that hacks with the OS config is just nuts.


Just my 2c,
Cameron Simpson 
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Re: Change ip address -

2015-10-06 Thread Rick Stevens

On 10/06/2015 12:36 PM, Bob Goodwin wrote:

On 10/06/15 15:05, Gordon Messmer wrote:

too bad you weren't here yesterday ...


Rick gave a reasonable response.  Could have been improved to not
interfere with regular network access, but I thought it was good enough.

.

Yes. Initially I could not get the NM GUI to respond to my entries.
After I edited /etc/sysconfig/network-scripts/ifcfg-enp0s25 I was able
to configure it. Perhaps adding NM_CONTROLLED=yes made the difference? I
just wanted my problem fixed and did not experiment beyond that.
Restored the original file when done ...


"NM_CONTROLLED=yes" indicates that, yes, that device is controlled via
Network Manager (and therefore modifiable via the GUI). If that's
missing or set to "no", then the device is controlled via the settings
in the ifcfg- file.
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Re: Change ip address -

2015-10-06 Thread Rick Stevens

On 10/06/2015 12:15 PM, Gordon Messmer wrote:

On 10/06/2015 09:13 AM, Robert Nichols wrote:

It's highly likely that it will simply use its only interface as
a default route, at least that's the way it worked for the two IP
cameras I set up that also had an initial IP address of 1.1.1.1.


That's not generally how IPv4 works.  In the simple, most common
configuration, a device has an address and a netmask.  For a device that
defaults to 1.1.1.1, that's probably either /8 or /24.  In that case,
the device will be able to respond to addresses prefixed with 1.anything
or 1.1.1.anything, respectively.

It's technically possible that the device could have a 0.0.0.0/0 direct
route on its network interface, but it's extremely unlikely. I've never
seen a device configured that way by default.  (Such a device would try
to resolve all addresses via ARP.)  If a device were configured that
way, users probably wouldn't be instructed to use 1.1.1.2 as their own
address, as Bob was.  And that's really the point: Bob stated the
requirement that he use 1.1.1.2 as his address, and adding a direct
route doesn't accomplish that.


I don't know that Bob actually said he HAD to use 1.1.1.2. My guess
(without knowing what the mysterious "device" is) is that the device
used 1.1.1.1/24 and it suggested he use 1.1.1.2 as his address. If that
was the case, than any 1.1.1.0/24 address (other than 1.1.1.1) would
work.

I think the proper way to do handle this (if this reset thing is going
to be ongoing) would be to:

1. Create a udev rule that uses the MAC addr of the NIC to tie
the device to a standardized name (e.g. "eth0"). I absolutely
detest this damned renaming of devices based on when they got
scanned by the kernel. It is a spectacularly idiotic idea and
the fact you can rename it in udev hints that the kernel
developers tacitly agree.

2. Create create an alias to that new name (e.g. "eth0:0").

3. Stick a permanent 1.1.1.2/24 address on that alias.

That way he can always get to 1.1.1.1 (with or without a gateway) since
the aliased NIC and the reset device will be on the same network.

The best solution is to set up the device so it is on the same network
as his machine and figure out why he has to reset it to factory
defaults all the time. I could possibly live with resets to a saved
configuration although I'd be rather annoyed. Having to reset to
factory defaults constantly would indicate the thing should be junked
because of a really poor design. Heaven knows what other nefarious
things it's doing (I sure hope this is all behind a firewall and you
monitor all network connections with something like snort).
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Re: Change ip address -

2015-10-06 Thread Bob Goodwin

On 10/06/15 15:05, Gordon Messmer wrote:
too bad you weren't here yesterday ... 


Rick gave a reasonable response.  Could have been improved to not 
interfere with regular network access, but I thought it was good enough. 

.

Yes. Initially I could not get the NM GUI to respond to my entries. 
After I edited /etc/sysconfig/network-scripts/ifcfg-enp0s25 I was able 
to configure it. Perhaps adding NM_CONTROLLED=yes made the difference? I 
just wanted my problem fixed and did not experiment beyond that. 
Restored the original file when done ...


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Re: Change ip address -

2015-10-06 Thread Gordon Messmer

On 10/06/2015 09:13 AM, Robert Nichols wrote:

It's highly likely that it will simply use its only interface as
a default route, at least that's the way it worked for the two IP
cameras I set up that also had an initial IP address of 1.1.1.1.


That's not generally how IPv4 works.  In the simple, most common 
configuration, a device has an address and a netmask.  For a device that 
defaults to 1.1.1.1, that's probably either /8 or /24.  In that case, 
the device will be able to respond to addresses prefixed with 1.anything 
or 1.1.1.anything, respectively.


It's technically possible that the device could have a 0.0.0.0/0 direct 
route on its network interface, but it's extremely unlikely. I've never 
seen a device configured that way by default.  (Such a device would try 
to resolve all addresses via ARP.)  If a device were configured that 
way, users probably wouldn't be instructed to use 1.1.1.2 as their own 
address, as Bob was.  And that's really the point: Bob stated the 
requirement that he use 1.1.1.2 as his address, and adding a direct 
route doesn't accomplish that.



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Re: Change ip address -

2015-10-06 Thread Gordon Messmer

On 10/06/2015 08:42 AM, Bob Goodwin wrote:
I've saved this for future use, too bad you weren't here yesterday ... 


Rick gave a reasonable response.  Could have been improved to not 
interfere with regular network access, but I thought it was good enough.

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Re: Change ip address -

2015-10-06 Thread Robert Nichols

On 10/06/2015 09:39 AM, Gordon Messmer wrote:

On 10/06/2015 05:24 AM, Robert Nichols wrote:


  ip route add to 1.1.1.1 dev enp0s25

That's all there is to it. Your system now knows that address 1.1.1.1
can be reached directly (no gateway) on that interface.


And how does that destination respond?

It's not as simple as you suggest.  The Buffalo device probably has no
(reachable) gateway, so it will only be able to route outgoing packets
of its own if the destination is within the broadcast network
corresponding to its address and netmask.


It's highly likely that it will simply use its only interface as
a default route, at least that's the way it worked for the two IP
cameras I set up that also had an initial IP address of 1.1.1.1.
Of course that's going to work only for a direct connection with
no router in the way, but that's also true for "ip addr add
1.1.1.2/24 dev eth0".

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Re: Change ip address -

2015-10-06 Thread Bob Goodwin

On 10/06/15 10:39, Gordon Messmer wrote:


The right way to do this was always to add 1.1.1.2 to Bob's 
interface.  Either, as was suggested, using the older (deprecated) 
ifconfig command:

ifconfig eth0:0 1.1.1.2 netmask 255.255.255.0
or using ip:
ip addr add 1.1.1.2/24 dev eth0

.

I've saved this for future use, too bad you weren't here yesterday ...

Thank you,

Bob

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Re: Change ip address -

2015-10-06 Thread Gordon Messmer

On 10/06/2015 05:24 AM, Robert Nichols wrote:


  ip route add to 1.1.1.1 dev enp0s25

That's all there is to it. Your system now knows that address 1.1.1.1
can be reached directly (no gateway) on that interface.


And how does that destination respond?

It's not as simple as you suggest.  The Buffalo device probably has no 
(reachable) gateway, so it will only be able to route outgoing packets 
of its own if the destination is within the broadcast network 
corresponding to its address and netmask.


The right way to do this was always to add 1.1.1.2 to Bob's interface.  
Either, as was suggested, using the older (deprecated) ifconfig command:

ifconfig eth0:0 1.1.1.2 netmask 255.255.255.0
or using ip:
ip addr add 1.1.1.2/24 dev eth0


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Re: Change ip address -

2015-10-06 Thread Robert Nichols

On 10/06/2015 03:19 AM, Bob Goodwin wrote:

On 10/05/15 21:18, Robert Nichols wrote:


All you needed to do was add a routing table entry to direct packets for
1.1.1.1 out the appropriate interface. No need to mess up the rest of
your networking.

.

I was able to accomplish what I needed to do and the system was returned
to normal without much difficulty but I am interested in your suggestion
since this is something that comes up at times however I could use a
some clarification of:

"add a routing table entry to direct packets for
1.1.1.1 out the appropriate interface."

After a bit of Googling I see the following which seems like it might
apply to my need to access the Buffalo ethernet bridge device I needed
to access after  doing a default "reset" to 1.1.1.1.

"Directly Attached NetworkThe local network entry corresponds to the
directly attached network. IP packets destined for the directly attached
network are not forwarded to a router but sent directly to the
destination. Note that the Gateway and Interface columns match the IP
address of the node. This indicates that the packet is sent from the
network adapter corresponding to the node's IP address."

I don't know exactly how to do that, an example perhaps ...


  ip route add to 1.1.1.1 dev enp0s25

That's all there is to it. Your system now knows that address 1.1.1.1
can be reached directly (no gateway) on that interface. At some point
you'll probably want to run "ip route delete 1.1.1.1", but there's no
rush unless you want to connect to a 1.1.1.1 address out there on the
internet.

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Re: Change ip address -

2015-10-06 Thread Bob Goodwin

On 10/05/15 21:18, Robert Nichols wrote:


All you needed to do was add a routing table entry to direct packets for
1.1.1.1 out the appropriate interface. No need to mess up the rest of
your networking. 

.

I was able to accomplish what I needed to do and the system was returned 
to normal without much difficulty but I am interested in your suggestion 
since this is something that comes up at times however I could use a 
some clarification of:


"add a routing table entry to direct packets for
1.1.1.1 out the appropriate interface."

After a bit of Googling I see the following which seems like it might 
apply to my need to access the Buffalo ethernet bridge device I needed 
to access after  doing a default "reset" to 1.1.1.1.


"Directly Attached NetworkThe local network entry corresponds to the 
directly attached network. IP packets destined for the directly attached 
network are not forwarded to a router but sent directly to the 
destination. Note that the Gateway and Interface columns match the IP 
address of the node. This indicates that the packet is sent from the 
network adapter corresponding to the node's IP address."


I don't know exactly how to do that, an example perhaps ...

Thanks,

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FEDORA-23beta/64bit LINUX XFCE POP3

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Re: Change ip address -

2015-10-05 Thread Robert Nichols

On 10/05/2015 03:12 PM, Bob Goodwin wrote:

On 10/05/15 15:50, Rick Stevens wrote:


The instruction says the reset device is now 1.1.1.1

I need to access it at that address in order to configure it.


To change the config on F22 via the NM GUI, just right click on the
icon, select "Edit connections", select the connection you want to
change, click "Edit".

In the next screen, click on "IPv4 Settings" and change your configs
the way you want them to be (e.g. click the dropdown on "Method" and
select "Manual", then in "Addresses", select the existing config and
click "Delete", then click "Add" and fill in the blanks).

If you want this to just be temporary, you could (as root):

ifconfig  1.1.1.2 netmask 255.255.255.0

That would set the IP address of the NIC to 1.1.1.2/24 and you could
configure the device. Then right-click on the NM GUI icon, disable and
then re-enable networking to revert back to the old settings.

Yeah, sort of clunky, but should do the job.

.

I edited /etc/sysconfig/network-scripts/ifcfg-enp0s25 as Jack Craig
suggested and then I was able to make the changes in the NM GUI, dunno
why it wouldn't work before. Perhaps a typo, I'm a lousy typist.

Anyway I have the configuration screen up on another computer so I'm off
to fix things the way I want them.


All you needed to do was add a routing table entry to direct packets for
1.1.1.1 out the appropriate interface. No need to mess up the rest of
your networking.

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Re: Change ip address -

2015-10-05 Thread Bob Goodwin

On 10/05/15 15:50, Rick Stevens wrote:


The instruction says the reset device is now 1.1.1.1

I need to access it at that address in order to configure it.


To change the config on F22 via the NM GUI, just right click on the
icon, select "Edit connections", select the connection you want to
change, click "Edit".

In the next screen, click on "IPv4 Settings" and change your configs
the way you want them to be (e.g. click the dropdown on "Method" and
select "Manual", then in "Addresses", select the existing config and
click "Delete", then click "Add" and fill in the blanks).

If you want this to just be temporary, you could (as root):

ifconfig  1.1.1.2 netmask 255.255.255.0

That would set the IP address of the NIC to 1.1.1.2/24 and you could
configure the device. Then right-click on the NM GUI icon, disable and
then re-enable networking to revert back to the old settings.

Yeah, sort of clunky, but should do the job. 

.

I edited /etc/sysconfig/network-scripts/ifcfg-enp0s25 as Jack Craig 
suggested and then I was able to make the changes in the NM GUI, dunno 
why it wouldn't work before. Perhaps a typo, I'm a lousy typist.


Anyway I have the configuration screen up on another computer so I'm off 
to fix things the way I want them.


Thanks to both of you for the help,

Bob

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Re: Change ip address -

2015-10-05 Thread Rick Stevens

On 10/05/2015 12:16 PM, Bob Goodwin wrote:

On 10/05/15 15:08, Rick Stevens wrote:


Do you want to change the computer's IP via the GUI or the "device"?

.

The F-22 computer.


If it's the computer, what desktop are you using and are you using
Network Manager or ye oldie network scripts?

.

I was trying with the NM GUI since there is an icon at the top of my
XFCE screen.



If it's the "device", what "device" is it?

.

The instruction says the reset device is now 1.1.1.1

I need to access it at that address in order to configure it.


To change the config on F22 via the NM GUI, just right click on the
icon, select "Edit connections", select the connection you want to
change, click "Edit".

In the next screen, click on "IPv4 Settings" and change your configs
the way you want them to be (e.g. click the dropdown on "Method" and
select "Manual", then in "Addresses", select the existing config and
click "Delete", then click "Add" and fill in the blanks).

If you want this to just be temporary, you could (as root):

ifconfig  1.1.1.2 netmask 255.255.255.0

That would set the IP address of the NIC to 1.1.1.2/24 and you could
configure the device. Then right-click on the NM GUI icon, disable and
then re-enable networking to revert back to the old settings.

Yeah, sort of clunky, but should do the job.
--
- Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
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--
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Re: Change ip address -

2015-10-05 Thread Bob Goodwin

On 10/05/15 15:08, Rick Stevens wrote:


Do you want to change the computer's IP via the GUI or the "device"?

.

The F-22 computer.


If it's the computer, what desktop are you using and are you using
Network Manager or ye oldie network scripts?

.

I was trying with the NM GUI since there is an icon at the top of my 
XFCE screen.




If it's the "device", what "device" is it? 

.

The instruction says the reset device is now 1.1.1.1

I need to access it at that address in order to configure it.


--
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
box10  FEDORA-23beta/64bit LINUX XFCE POP3

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Re: Change ip address -

2015-10-05 Thread Rick Stevens

On 10/05/2015 11:56 AM, Bob Goodwin wrote:

I have a device that when reset requires I set my Fedora-22 computer to
the address 1.1.1.2 in order that I can access it at 1.1.1.1. with my
Firefox browser.

I only need to do this long enough to change it's address to 191.168.1.200.

My attempts at using the network GUI have not been successful.

Can someone point me to an instruction or tell me how to do this?


Do you want to change the computer's IP via the GUI or the "device"?

If it's the computer, what desktop are you using and are you using
Network Manager or ye oldie network scripts?

If it's the "device", what "device" is it?
--
- Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
- AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
--
-  A day for firm decisions!!!   Well, then again, maybe not!-
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Re: Change ip address -

2015-10-05 Thread Jack Craig
vi /etc/sysconfig/network-scripts/ifcfg-

UUID="3b09ebdf-057f-4ead-ab74-7bd90cdc4980"
NM_CONTROLLED=yes
BOOTPROTO=none
ONBOOT=yes
TYPE=Ethernet


IPADDR0=108.220.213.121
NETMASK=255.255.255.248


save a copy of file, then edit above file, restart network...

hth, ...

On Mon, Oct 5, 2015 at 11:56 AM, Bob Goodwin 
wrote:

> I have a device that when reset requires I set my Fedora-22 computer to
> the address 1.1.1.2 in order that I can access it at 1.1.1.1. with my
> Firefox browser.
>
> I only need to do this long enough to change it's address to 191.168.1.200.
>
> My attempts at using the network GUI have not been successful.
>
> Can someone point me to an instruction or tell me how to do this?
>
> Thanks,
>
> Bob
>
>
>
>
> --
> Bob Goodwin - Zuni, Virginia, USA
> http://www.qrz.com/db/W2BOD
> box10  FEDORA-23beta/64bit LINUX XFCE POP3
>
> --
> users mailing list
> users@lists.fedoraproject.org
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org
>
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Change ip address -

2015-10-05 Thread Bob Goodwin
I have a device that when reset requires I set my Fedora-22 computer to 
the address 1.1.1.2 in order that I can access it at 1.1.1.1. with my 
Firefox browser.


I only need to do this long enough to change it's address to 191.168.1.200.

My attempts at using the network GUI have not been successful.

Can someone point me to an instruction or tell me how to do this?

Thanks,

Bob




--
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
box10  FEDORA-23beta/64bit LINUX XFCE POP3

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