Chris,


I specifically noted NTP here (there is a reason).

You now mentioned the same groups I inquired about before to inquire, but received private emails instead to speak to you alone. I'll do more research to find those as well now. This really does seem circular.


Thanks and 73,


- KB3VWG








On Friday, May 10, 2024 at 07:27:16 AM EDT, Chris via 44net <44net@mailman.ampr.org> wrote:


Hi Lynwood,

So to be clear, 44.1.1.44 resides at AS64435 The Communication GATEWAY LTD in the United Kingdom. You seem to control 44.1.1.0/24 for the purpose?

The company you mention is contracted by ARDC to provide some hosting services, mostly internal to ARDC but there are some services such as ns.ardc.net hosted there as well. ARDC staff control the VMs. It’s a fairly standard arrangement as ARDC don’t have their own rackspace yet - although that may be changing in the future.

So instead of me leaving MDC and my packet hopping a trans-Atlantic fiber cable to you, it makes a round trip to California first before doing so.

I don't understand why this is a problem - a few more ms delay on a reliable fibre network will not adversely affect DNS lookups.

TBH, let me review the current Wiki wording, etc.

As I understand it now - IPENCAP users have to make complex routes/rules (and possibly SNATs if they firewall and respect AMPRGW's bandwidth) on their GW to use services with ns.ardc,org -from within AMPRNet. That's not considering now we're discussing NTP.

Not really, so long as you have an A record for your encap’d host it will traverse the gateway router without any issue.

I mentioned privately to you there was a TAC mailing list that went defunct, I'd like to beta test as well.

This is a lot of information to consume. Sharing is key as well.

You can find all our discussion groups here: https://ardc.groups.io/g/main you are welcome to join in.

73,
Chris - G1FEF
—
ARDC Administrator

Web: https://www.ardc.net



- KB3VWG

On Friday, May 10, 2024 at 06:43:15 AM EDT, Chris <chris@ardc.net> wrote:


Hi Lynwood,

I can look into the feasibility of adding a tunnel endpoint to at least one of the authoritative DNS servers if you think that would be useful.

Just FYI though, the IPIP Tunnel Mesh network is on the decline, it has been for many years now, at some point in the not too distant future I imagine it will be deprecated in favour of the far more feature rich and reliable POPs the TAC are developing and which are currently in beta.

73,
Chris - G1FEF
—
ARDC Administrator

Web: https://www.ardc.net


On 10 May 2024, at 11:32, lleachii@aol.com wrote:

Chris,


I'm not sure you understand how profound your statement was or should be to all. Per our discussions on this thread, I understood the use case to be that access to ns.ardc.net be via 44net SRC IPs. Perhaps I misconceive that the IPENCAP users were being considered when the statement was made?

So OK cool - this server sits on the Public Internet, without a [voluntary] tunnel. I previously inquired about it's location, etc. for these reasons (keeping in mind UDP delays discussed for NTP, DNS, etc.):


config nat                               
        option src 'amprwan'             
        option src_ip '44.60.44.254'          
        option dest_ip '44.1.1.44/32'             
        option target 'SNAT'              
        option snat_ip '44.60.44.1'    
        option name 'test'                      
        list proto 'all'

Reasoning to explain the complexity -

In addition to needing an IP rule to for the route to use AMPRNet, I then need to SNAT to use a Public IP 44net IP - because the server is not on AMPRNet.

---

root@OpenWrt:~# tcpdump -vvvn -i tunl0 udp and port 123 and  host 44.1.1.44
tcpdump: listening on tunl0, link-type RAW (Raw IP), snapshot length 262144 bytes
10:09:07.781705 IP (tos 0x48, ttl 64, id 11385, offset 0, flags [DF], proto UDP (17), length 76)
    44.60.44.1.46695 > 44.1.1.44.123: [bad udp cksum 0x85b3 -> 0x9279!] NTPv4, Client, length 48
        Leap indicator:  (0), Stratum 0 (unspecified), poll 0 (1s), precision 0
        Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: (unspec)
          Reference Timestamp:  0.000000000
          Originator Timestamp: 0.000000000
          Receive Timestamp:    0.000000000
          Transmit Timestamp:   1349083242.779565174 (1942-10-02T09:20:42Z)
            Originator - Receive Timestamp:  0.000000000
            Originator - Transmit Timestamp: 1349083242.779565174 (1942-10-02T09:20:42Z)
10:09:07.981557 IP (tos 0x0, ttl 50, id 38178, offset 0, flags [DF], proto UDP (17), length 76)
    44.1.1.44.123 > 44.60.44.1.46695: [udp sum ok] NTPv4, Server, length 48
        Leap indicator:  (0), Stratum 2 (secondary reference), poll 0 (1s), precision -22
        Root Delay: 0.004333, Root dispersion: 0.039169, Reference-ID: 0x55c7d666
          Reference Timestamp:  3924323032.642092258 (2024-05-10T09:43:52Z)
          Originator Timestamp: 1349083242.779565174 (1942-10-02T09:20:42Z)
          Receive Timestamp:    3924324547.884376446 (2024-05-10T10:09:07Z)
          Transmit Timestamp:   3924324547.884487523 (2024-05-10T10:09:07Z)
            Originator - Receive Timestamp:  +2575241305.104811271
            Originator - Transmit Timestamp: +2575241305.104922349


---


It now works. Transparency is key and I appreciate the response.

So now the question truly begs. Since you know our IPs, why not make a firewall/access rule allowing them also (that's what I do, because it seems to have been done on the old gw.ampr.org)?

It seems that we took an extremely circuitous route for me to determine the same information I inquired upon originally and had to learn through days of seeing connectivity errors relying on the statement. I'm glad it's clarified now.
 


Many thanks and 73,




- KB3VWG



On Friday, May 10, 2024 at 05:47:41 AM EDT, Chris <chris@ardc.net> wrote:



> On 10 May 2024, at 10:36, lleachii--- via 44net <44net@mailman.ampr.org> wrote:
>
> Does ns.ardc.org have an access policy restricting traffic to only IPs with a DNS entry (i.e. Intra-AMPRNet only)?
>
> That differs from what I've been told, so I wish ask.
>
> I'm having a difficult time with one of my valid AMPRNet IPs and have been struggling for days. I only have success with IPS having DNS entries.

ns.ardc.net will provide authoritative DNS answers from any IPv4 or IPv6 address for ampr.org and the reverse zones it is authoritative for.

From what you’ve said it may be that you are trying to query it from a host inside the IPIP Tunnel Mesh? In which case your query will need to traverse the gateway router at UCSD in order to reach ns.ardc.net which, although is on a 44Net IP address, is not connected to the IPIP Tunnel Mesh - it is on directly announced (BGP) 44Net address space.

As you can only traverse the gateway router at UCSD if your host’s IP has an A record in ampr.org that is the most likely reason for what you are seeing.

73,
Chris - G1FEF




> 73,
>
>
> Lynwood
> KB3VWG
>
>
>
>
>
> _______________________________________________
> 44net mailing list -- 44net@mailman.ampr.org
> To unsubscribe send an email to 44net-leave@mailman.ampr.org


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