Voucher Length

klamath

Hi there! :)
I have a pfsense firewall running at the hotel and we've been using the captive portal with voucher system for a short time', but we've got a lot of complaints from the guests about the length of the vouchers.

we are wondering if anyone has any tip for shortening the length of the vouchers?
is it possible, vouchers to 6 characters max?

thanks!

Nachtfalke

This would be interesting for me, too.
Perhaps it would be possible to shorten the characters. So just use numbers so it is easier for your guest to enter these voucher codes.

But it would be great if there would be an option to enter a specific voucher length.

valshare

+1

dj_seijin

+100

eri--

You can restrict the character set already only to numbers.
But without some financial backing i do not think anyone will do the modifications.

sandern

Create a shorter private key and modify the roll/ticket/checksum bits accordingly.

My vouchers are 6 characters long.

nabachi

@sandern:

Create a shorter private key and modify the roll/ticket/checksum bits accordingly.

My vouchers are 6 characters long.

Hi,

Can you please elaborate more on this. How did you create a shorter Key? I was getting an error when i tried to create a 6-bit key. Any Help would be great.

Thanks

valshare

Hi, the shortest key i was able to create with openssl was a 32bit key. With this, i was ables to create a 8-10 length Voucher key.

nabachi

ah, so i must be doing something wrong in the voucher configuration. :)

Which values did you use in number of roll, ticket and checksum?

I am now trying out different values in the configuration. 8 - 10 characters is good in my opinion.

Thanks Valshare

nabachi

Hi again,

I couldn't make the voucher length shorter than 20 characters. Rolls and Ticket bits seems to effect the number of voucher rolls and tickets which can be created under each roll or tickets.

Kind Regards

valshare

Hi,

here are my setting. You must delete the old tickets and create new ones.

Regards, Valle

voucher_setup.jpg_thumb

valshare

there is an error in the "# of Roll Bits". This must be 15 to leave room the place the magic initializer.

nabachi

@valshare:

Hi,

here are my setting. You must delete the old tickets and create new ones.

Regards, Valle

Hi Valle,

Thanks to you, i was able to generate 10 - 7 character long voucher :)

I was able to generate 7 character log vouchers with the default voucher configs from a fresh installation of pfsense 2.0. I had 20 character voucher's after i changed "character set" to 123456789.

Many Thanks & Kind Regards

klamath

@sandern:

Create a shorter private key and modify the roll/ticket/checksum bits accordingly.

My vouchers are 6 characters long.

explain how to do it, please!

sandern

Hi,

First generate a key "openssl genrsa 30 > key.private"

I'm not sure about the 30 but I tried a few times to get the smallest possible number, it was 29-30-31 or something. The lowest one it would accept.

Then openssl rsa -pubout < key.private >key.public

And use the following values in the configuration screen:

Roll bits: #5 (This can be more but we didn't have to use many different rolls)
Ticket bits: #16
Checksum bits: #5

With this values I had a roll with 1023 vouchers with a length of 5-6 characters.

Sander

klamath

@sandern:

Hi,

First generate a key "openssl genrsa 30 > key.private"

I'm not sure about the 30 but I tried a few times to get the smallest possible number, it was 29-30-31 or something. The lowest one it would accept.

Then openssl rsa -pubout < key.private >key.public

And use the following values in the configuration screen:

Roll bits: #5 (This can be more but we didn't have to use many different rolls)
Ticket bits: #16
Checksum bits: #5

With this values I had a roll with 1023 vouchers with a length of 5-6 characters.

Sander

Thanks!!!
works only with 31… i got error with 30!

"openssl genrsa 31 > key.private"

The vouchers is now with 7 characters length!

Work like a charm!!!
THANKS!!! THANKS!!! THANKS!!!

brunoguidone

@sandern:

Hi,

First generate a key "openssl genrsa 30 > key.private"

I'm not sure about the 30 but I tried a few times to get the smallest possible number, it was 29-30-31 or something. The lowest one it would accept.

Then openssl rsa -pubout < key.private >key.public

And use the following values in the configuration screen:

Roll bits: #5 (This can be more but we didn't have to use many different rolls)
Ticket bits: #16
Checksum bits: #5

With this values I had a roll with 1023 vouchers with a length of 5-6 characters.

Sander

Sorry, can you explain better?
because it still doesn't work. I need to generate a voucher with 6 characters.

Thanks for help,
Bruno

wallabybob

What parameters did you try? What was the outcome?

How many characters do you have in your set of available characters for voucher codes?

brunoguidone

@wallabybob:

What parameters did you try? What was the outcome?

How many characters do you have in your set of available characters for voucher codes?

Hi Wallabybob
That's my configuration:
.
I tried all combinations and stays longer than 10 characters. Can you help me, please ?

Thanks,
Bruno

wallabybob

@brunoguidone:

Can you help me, please ?

I have not read the voucher handling code so I'm guessing. After reading this thread a few times I SUSPECT Sandern left out a step in his instructions: I suspect that the contents of the key.private and key.public files should be pasted into the corresponding key boxes on the voucher configuration page. Did you do that?

I suspect the default keys need to be replaced by shorter keys to produce a shorter length voucher code. Possibly a smaller magic number will also help.