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Plasmamac

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Joined: 31/01/2019
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Posted: 06:19am 02 Jun 2023

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Hi, ive testet the webmite udp with a ip adress outside my homenetwork. No success atm. Have anyone tested this also?

Plasma

Mixtel90

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Posted: 06:54am 02 Jun 2023

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Will your router pass UDP? I don't think they are normally set up to do so by default as it can be a security risk. They normally won't accept UDP connections from outside.

Mick

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TassyJim

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Posted: 07:29am 02 Jun 2023

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try sending a UDP message to tassyjim.ddns.net port 6802

It only accepts messages one at a time.

I will add some logging later.
It is also running on a part of my network I don't normally expose so it will not be there for long.

That's going trough two NATs

Jim
Edited 2023-06-02 17:37 by TassyJim

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TassyJim

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Posted: 10:25pm 02 Jun 2023

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I have now put a WEBmite on the net.
It is running a slightly modified version of Peters example.

'
OPTION EXPLICIT
OPTION DEFAULT INTEGER
DIM remoteIP$, n, lastTime$
WEB UDP INTERRUPT myUDPint
'WEB UDP SEND "tassyjim.ddns.net", 6802, "Hello world"
DO
LOOP UNTIL n > 100

SUB myUDPint
PRINT "received "+MM.MESSAGE$+" from "+MM.ADDRESS$+" at "+TIME$
IF remoteIP$ = MM.ADDRESS$ AND LEFT$(lasttime$,5) = LEFT$(TIME$,5) THEN
INC n
ELSE
remoteIP$ = MM.ADDRESS$
lastTime$ = TIME$
n = 1
ENDIF
IF n < 10 AND LEN(MM.MESSAGE$) < 200 THEN
WEB UDP SEND MM.ADDRESS$,6802,MM.MESSAGE$+" at "+TIME$
ENDIF
END SUB

The biggest risk with having a simple server on the net is how easy it would be to end up with a race condition where a message gets bounced back and forth eating up all your bandwidth and eventually getting banned by your ISP.

The above code should limit a user to 10 hits in any minute.
Not very sophisticated and I will do more but it would be silly announcing the code. That would make it too easy for anyone wanting to play silly games.

Code at the other end is:

'
OPTION EXPLICIT
OPTION DEFAULT INTEGER

WEB UDP INTERRUPT myUDPint
WEB UDP SEND "tassyjim.ddns.net", 6802, "Hello world"
DO
LOOP

SUB myUDPint
PRINT "received "+MM.MESSAGE$+" from "+MM.ADDRESS$+" at "+TIME$
END SUB

It just sends one packet and prints the reply.

This will test your router to see if it has port triggering or port forwarding set up.

Jim

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TassyJim

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Posted: 02:20am 03 Jun 2023

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Quote received Hello world from 92.xxx.xxx.xxx at 12:17:11

Did you get the reply?
(Local time which is 02:17 UTC)

Jim
Edited 2023-06-03 12:21 by TassyJim

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Plasmamac

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Posted: 04:04am 03 Jun 2023

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No reply

Plasma

TassyJim

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Posted: 05:38am 03 Jun 2023

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I received plenty of packets and when I tested it, I was receiving replies OK.

The replies are sent to your public IP port 6802 so it looks like you need to check your router port forwarding

That's the trouble with UDP, not easy to know if it works.

Edit: I can't ping the 92.xxx.xxx.xxx address and a trace gets lost in telefonica.de

Jim
Edited 2023-06-03 15:42 by TassyJim

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Plasmamac

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Posted: 10:09am 03 Jun 2023

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Hmm i forwarded the range 6800-8888 to the ip from the mite , dunno why nothing works.
Sorry for flooding, next tests tonight
I totally forget to check the ping 😵‍💫 omg

Plasma

TassyJim

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Posted: 11:50am 03 Jun 2023

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Plasmamac said Hmm i forwarded the range 6800-8888 to the ip from the mite , dunno why nothing works.

UDP not TCP?

Jim

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Plasmamac

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Posted: 12:06pm 03 Jun 2023

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Udp yes

Plasma

TassyJim

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Posted: 09:09pm 03 Jun 2023

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The WEBmite UDP server is back up again.

Next silly question.
You do have the server set in options?

OPTION UDP SERVER PORT 6802

Also,
Many ISPs use CGNAT (Commercial Grade NAT) to save on IP addresses.
In Australia Telstra mobile network is one example.

Can you check you WAN IP as reported by your router and advise the first part only.
If it starts with '92.' it looks like a true public ip but starting with '100.' and it indicates CGNAT. There will be other CGNAT ranges.

Some ISPs block all incoming ports unless you request them being opened. Opening the range 6800-8888 is excessive and I suggest just forwarding what is required.

Apart from that, I have run out of ideas.

Jim

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TassyJim

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Posted: 09:17pm 03 Jun 2023

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Quote received Hi ! Plasma here from 77.xxx.xxx.xxx at 07:15:34

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Plasmamac

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Posted: 09:25pm 03 Jun 2023

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HI Tassyjim

it works ! got reply from your server . i reboot the router and all fine now.

i will now check the runtime if you have nothing against

480 ms atm .
Edited 2023-06-04 07:33 by Plasmamac

Plasma

TassyJim

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Posted: 09:36pm 03 Jun 2023

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Good to see it working.
I noticed that your IP has changed. That means you are on a dynamic IP like most users. That is not a problem.

Jim

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TassyJim

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Posted: 03:02am 04 Jun 2023

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Quote *received Hi ! Paket runtime test from 77.xxx.xxx.xxx at 04:37:32 5
* Safety shutdown
>

You exceeded 10 in a minute so it stopped replying and after 100 in an hour, the system shuts down and needs a manual re-start.

A bit crude but offers some protection from a wrongly programmed pico going astray.

Jim

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Plasmamac

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Posted: 08:52am 04 Jun 2023

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Yup sry for this, a speedtest

Plasma

TassyJim

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Posted: 09:50am 04 Jun 2023

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Plasmamac said Yup sry for this, a speedtest

Don't be sorry, it all helps me refine the protection.

It now has a limit of 20 per minute and will restart at the next hour if you overload it too much.

I have plenty of bandwidth.

Jim

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Plasmamac

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Posted: 09:32pm 04 Jun 2023

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ok will check

Plasma

TassyJim

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Posted: 04:08am 07 Jun 2023

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I have shut the echo program down. I needed the pico for a real job.

Jim

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Plasmamac

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Posted: 05:59am 07 Jun 2023

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Plasma

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