44net

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3194 discussions

domain cleanup idea
by kb9mwr＠gmail.com 09 May '13

09 May '13

First, Hessu your VPN idea looks interesting. Hopefully I'll have some time in the coming weeks to give it a try. Thanks for your efforts. Regarding cleaning up the DNS. Someone mentioned the idea of sorting hosts that are theoretically reachable via a tunnel. Then possibly purging ones that are not, or at least further review of these. So we gave it a shot, seemed simple enough. Look at the encap.txt file, look for hosts in each CIDR... (checking this file: ftp://hamradio.ucsd.edu/pub/amprhosts.) A quick google search yielded this nifty function that is the magic to the whole thing http://stackoverflow.com/questions/594112/matching-an-ip-to-a-cidr-mask-in-… http://pastebin.com/CCiX4Upd It's not quite working, maybe someone who knows more can fix it? I get some errors about Undefined offsets. Steve, KB9MWR

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use of 44-net behind NAT
by Jim Alles 01 May '13

01 May '13

from the wiki at http://en.wikipedia.org/wiki/AMPRNet: *44.128.0.0/16* *44.128.x.x is the testing subnet and consists of 65,536 (216) addresses. Much akin to 10.0.0.0/8, 172.16.0.0/12, 169.254.0.0/16 or 192.168.0.0/16, this is an unroutable private IP block<http://en.wikipedia.org/wiki/Private_network>. Connectivity to the rest of the network should be given through router gateways <http://en.wikipedia.org/wiki/Gateway_(telecommunications)> much as one would do with Network address translation<http://en.wikipedia.org/wiki/Network_address_translation> in any other private IP block.* There is no attribution to that statement, and nothing I could find at AMPR.org Is this the best way to address devices when doing NAT into a private network? Any issues? Or are there advantages to requesting assigned numbers? thanks & 73, Jim Alles

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How to update DNS?
by Matt VK2RQ 01 May '13

01 May '13

I just made some requests via the AMPRNet portal to create some DNS records in the ampr.org domain, and the requests were rejected with the following remark: "DNS is not active yet, please subscribe to the 44-Net mailing list to keep advised of progress." I presume they are referring to this mail list. So, how do I get DNS records created in the ampr.org domain? I understand that in the past, there was an email robot, but I have been unable to find any details on how to use it. Can anyone point me in the right direction? Many thanks, Matt VK2RQ

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Going Forward: IPv6
by Jim Alles 01 May '13

01 May '13

What are your thoughts about where do we go with IPv6? We (PSARC) are about to request a backbone connection with IPv6 addressing. What if I wanted to map an assigned 44net address to a IPv6 address? Or, is tunneling the answer? It looks like the possibilities are endless http://en.wikipedia.org/wiki/IPv6_transition_mechanisms Jim A.

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tunnel alternates
by Jim Alles 30 Apr '13

30 Apr '13

Brian K.: *"This is precisely the situation that our longstanding method of tunnel gateways is designed to overcome. You do this by setting up a Linux host that is assigned a single PSU address, probably something that isn't too hard to do. You shouldn't need to have them open any holes in the firewall or ask for special treatment as long as the existing firewall allows IPIP (internet protocol #4) through, which most do because the firewall managers never thought to block it, and also because some VPN schemes used to use it. The PSU folks don't have to do anything about network 44 routing or BGP or whatever. You then get a subnet allocation from your regional AMPRNet IP address coordinator and register a gateway for that subnet (via the PSU address) on the portal. Voila', you now have a subnet of AMPRNet routed to your Linux host via IP-IP encapsulation, and through the technique of tunnel gatewaying that Linux host is now connected to the AMPRNet, albeit at a somewhat limited bandwidth."* * * I am not opposed to this, especially since I have not tried it yet. However, PSU has resources, that if they can be tapped, might enable PSARC do something equivalant to what USC is doing, but for the state of Pennsylvania. For one, to further experiment, and also to improve the bandwidth limitations down the road. The 'Backbone" connection I expect to get through PSU will be 1 gigabit/sec. If co-located w/ PennREN, we would be sitting on a statewide 10Gb/s middle mile network. And, that is IPv6 now. It would be a heck of a way to learn! 73, Jim A.

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Re: [44net] use of 44-net behind NAT
by kb9mwr＠gmail.com 30 Apr '13

30 Apr '13

Jim, Your question sounds similar to one I just asked last week. In my case, convincing the IT department to forward IPIP to our internal address isn't likely. So I have been playing with OpenVpn, and started documenting things. It looks like it will do what I want. Requests will come to my IPIP Rip gateway, which will also double as an OpenVPN server, and I'll route the traffic though that statefull connection. I have been trying to track down notes/papers/documents that might be of use: http://www.qsl.net/k/kb9mwr//wapr/tcpip/index.html Speaking of which, does anyone else have any recommendations on things that have been written over the years? I swear I am the only ham in my local club that has at least a basic understanding of TCP/IP. So anything I can use to help explain things to newbies would be helpful. I usually just reference the O'Reilly Books, TCP/IP Administration comes to mind. Has anything ever been written explaining DNS records with a ham slant?

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interesting problem
by Don Moore 24 Apr '13

24 Apr '13

A gateway had his internet address change yesterday and the new address was changed to the new address at the gateway successfully.. We've noticed that the RIP process has the correct address but the encap.txt file does not. Is there a problem at the gateway with the way it is handling the encap.txt file when data is changed? It appears that the old file is sent and not the new one.. 73, Don - ve3zda

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Re: [44net] private tunnel?
by kb9mwr＠gmail.com 19 Apr '13

19 Apr '13

Excellent explanation Marius. So how does PPTP compare to openvpn? I have tried to find a good explanation for the various VPN types, hamachi, openvpn, pptp, etc.. haven't really found such yet.

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Re: [44net] private tunnel?
by kb9mwr＠gmail.com 19 Apr '13

19 Apr '13

C.J. thanks for the examples. I think I know the answer to what I am going to ask, but.. Could an IPIP tunnel accomplish the same thing that OpenVPN can for the situation I described (NAT and no modification to a remote firewall)? Why not?

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portal registration issue
by Geoff Armstrong VA7CWD 17 Apr '13

17 Apr '13

Hello, I have tried on a number of occasions to register on the Portal. I have not received a confirmation email once. Anyone else having this issue? Thanks, Geoff VA7CWD / VE7KA

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