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* HFmodem + nopad option
@ 2026-03-20 19:48 Rafael Diniz
2026-03-21 7:24 ` Jonathan Lane
2026-03-25 12:51 ` Sergey Matveev
0 siblings, 2 replies; 7+ messages in thread
From: Rafael Diniz @ 2026-03-20 19:48 UTC (permalink / raw)
To: nncp-devel
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Here is a commit with the latest nopad proposal field + the changes in
the HF modem, which now works!
https://github.com/Rhizomatica/nncp/commit/c537d10965679068a8fd8d489b9e0a71df8f0bca
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* Re: HFmodem + nopad option
2026-03-20 19:48 HFmodem + nopad option Rafael Diniz
@ 2026-03-21 7:24 ` Jonathan Lane
2026-03-22 22:28 ` Rafael Diniz
2026-03-25 12:51 ` Sergey Matveev
1 sibling, 1 reply; 7+ messages in thread
From: Jonathan Lane @ 2026-03-21 7:24 UTC (permalink / raw)
To: Rafael Diniz, nncp-devel
On Fri Mar 20, 2026 at 12:48 PM PDT, Rafael Diniz wrote:
> Here is a commit with the latest nopad proposal field + the changes in
> the HF modem, which now works!
>
> https://github.com/Rhizomatica/nncp/commit/c537d10965679068a8fd8d489b9e0a71df8f0bca
>
Cool! I've been reading up on HERMES and it looks like an interesting
backcountry / maritime relay system even for places like the US. Can
you just get two units, pair them together, and establish a bridge? I'd
love to integrate that with NNCP for getting email in the woods without
the expense or power draw of a Starlink terminal.
And if you're still looking for a GitHub replacement, I recommend
SourceHut. Here's what my fork of John's NNCPNet looks like:
https://git.sr.ht/~tidux/nncpnet
--
Jonathan Lane
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: HFmodem + nopad option
2026-03-21 7:24 ` Jonathan Lane
@ 2026-03-22 22:28 ` Rafael Diniz
0 siblings, 0 replies; 7+ messages in thread
From: Rafael Diniz @ 2026-03-22 22:28 UTC (permalink / raw)
To: nncp-devel
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Hi Jonathan
We do have currently an email network which uses UUCP to directly
connect in a given region, gateway to diverse nodes over HF, no IP
(running postfix, dovecot, the same suspects.. calling uux / rmail...).
But not in the US.
In HERMES the plan here is to have it with NNCP in the future. If you
want to test such setup in the US, I think it would not be difficult,
but be aware the hams in the US don't like to hear the word encryption,
so I feel better get another type of licensing model to operate in woods
/ places without telecom coverage / telecom blackouts. I would not know
the precise service, but in ITU frequency chart they are named
fixed/portable/mobile wireless services, and there pretty a lot of bands
allocated for those in HF.
Even the most affordable amateur radio transceivers will operate outside
ham bands (usually just a small modification), or, of course,
professional rigs will operate by default in all HF bands, We use the
sBitx radio for our deployments, which are wideband, affordable, can run
all email setup, modem, nncp in the raspberry pi inside, and can cover
most the HF band as whole (we got licenses in Brazil, for example, in
the 5 MHz and upper 7 MHz).
Btw, I created a further optimized nncp branch with less overhead, after
the last email of Sergey which pointed to other places where padding is
done (tks Sergey!), but this is not ready for upstreaming, as it breaks
compatibility with v3 protocol (adds a v4 but keeps compatibility with
v3, as of now):
https://github.com/Rhizomatica/nncp/commits/pktv4-variable-path/
Thanks for the repo at https://git.sr.ht/~tidux/nncpnet ! Very useful
when I start migrating the email services!
Cheers,
Rafael
On 3/21/26 7:24 AM, Jonathan Lane wrote:
> On Fri Mar 20, 2026 at 12:48 PM PDT, Rafael Diniz wrote:
>> Here is a commit with the latest nopad proposal field + the changes in
>> the HF modem, which now works!
>>
>> https://github.com/Rhizomatica/nncp/commit/c537d10965679068a8fd8d489b9e0a71df8f0bca
>>
> Cool! I've been reading up on HERMES and it looks like an interesting
> backcountry / maritime relay system even for places like the US. Can
> you just get two units, pair them together, and establish a bridge? I'd
> love to integrate that with NNCP for getting email in the woods without
> the expense or power draw of a Starlink terminal.
>
> And if you're still looking for a GitHub replacement, I recommend
> SourceHut. Here's what my fork of John's NNCPNet looks like:
>
> https://git.sr.ht/~tidux/nncpnet
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* Re: HFmodem + nopad option
2026-03-20 19:48 HFmodem + nopad option Rafael Diniz
2026-03-21 7:24 ` Jonathan Lane
@ 2026-03-25 12:51 ` Sergey Matveev
2026-03-26 8:55 ` Rafael Diniz
2026-03-26 14:08 ` Rafael Diniz
1 sibling, 2 replies; 7+ messages in thread
From: Sergey Matveev @ 2026-03-25 12:51 UTC (permalink / raw)
To: nncp-devel
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*** Rafael Diniz [2026-03-20 19:48]:
>Here is a commit with the latest nopad proposal field + the changes in the
>HF modem, which now works!
Great! Merged into develop branch.
If you have got other additional commits and documentation update,
if HFmodem is ready to be publicly released then let me know.
--
Sergey Matveev (http://www.stargrave.org/)
LibrePGP: 12AD 3268 9C66 0D42 6967 FD75 CB82 0563 2107 AD8A
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* Re: HFmodem + nopad option
2026-03-25 12:51 ` Sergey Matveev
@ 2026-03-26 8:55 ` Rafael Diniz
2026-03-26 14:08 ` Rafael Diniz
1 sibling, 0 replies; 7+ messages in thread
From: Rafael Diniz @ 2026-03-26 8:55 UTC (permalink / raw)
To: nncp-devel
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On 3/25/26 12:51 PM, Sergey Matveev wrote:
> *** Rafael Diniz [2026-03-20 19:48]:
>> Here is a commit with the latest nopad proposal field + the changes in the
>> HF modem, which now works!
Hi Sergey!
I let you know, definitely, thanks for your support! At this point it is
fully functional. We of course need and will carry more over-the-air
tests to make sure everything is working as expected and also explore
other features like nncp-bundle in broadcast context to see if all works
well.
Cheers,
Rafael
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* Re: HFmodem + nopad option
2026-03-25 12:51 ` Sergey Matveev
2026-03-26 8:55 ` Rafael Diniz
@ 2026-03-26 14:08 ` Rafael Diniz
2026-04-01 11:34 ` Sergey Matveev
1 sibling, 1 reply; 7+ messages in thread
From: Rafael Diniz @ 2026-03-26 14:08 UTC (permalink / raw)
To: nncp-devel
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Btw, should we add to the manual some comment like:
• Handshake padding bypass — NNCP's sync protocol pads the first
handshake message to ~65 KB to hide queue depth from observers. At 87
BPS, transmitting 65 KB of padding takes over 12 minutes. A per-node
configuration option to skip this padding would make connection
establishment practical over HF.
?
On 3/25/26 12:51 PM, Sergey Matveev wrote:
> *** Rafael Diniz [2026-03-20 19:48]:
>> Here is a commit with the latest nopad proposal field + the changes in the
>> HF modem, which now works!
>
> Great! Merged into develop branch.
> If you have got other additional commits and documentation update,
> if HFmodem is ready to be publicly released then let me know.
>
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: HFmodem + nopad option
2026-03-26 14:08 ` Rafael Diniz
@ 2026-04-01 11:34 ` Sergey Matveev
0 siblings, 0 replies; 7+ messages in thread
From: Sergey Matveev @ 2026-04-01 11:34 UTC (permalink / raw)
To: nncp-devel
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*** Rafael Diniz [2026-03-26 14:08]:
>Btw, should we add to the manual some comment like: [...]
Should be useful, of course.
--
Sergey Matveev (http://www.stargrave.org/)
LibrePGP: 12AD 3268 9C66 0D42 6967 FD75 CB82 0563 2107 AD8A
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Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2026-03-20 19:48 HFmodem + nopad option Rafael Diniz
2026-03-21 7:24 ` Jonathan Lane
2026-03-22 22:28 ` Rafael Diniz
2026-03-25 12:51 ` Sergey Matveev
2026-03-26 8:55 ` Rafael Diniz
2026-03-26 14:08 ` Rafael Diniz
2026-04-01 11:34 ` Sergey Matveev