44net

44net@mailman.ampr.org

3194 discussions

question regarding amprgw.sysnet.ucsd.edu
by Blaine Forbort 01 Aug '13

01 Aug '13

Hi all, I've just set up my net44 gateway using a Debian machine running in the cloud with a static IP. My plan is to use this machine as an IPIP-to-OpenVPN adapter so that I can run my subnet from home via my LTE connection, with will not support IPIP. I set up the machine with Debian linux and rip44d. I'm currently receiving the routing table from 44.0.0.1, and I'm able to ping several net44 machines in my area (44.4.2.153 and 44.4.50.1 for example), however, my linux machine is not able to ping 44.0.0.1. At first I assumed that this was a security policy, however, I'm also not able to access the ampr.org website from that machine now. in addition, I'm unable to ping my machine's net44 address from the internet. Is this a result of gw.ampr.org not updating it's gateway list, and thus not knowing how to route to me, or have I missed something obvious? Also, if anyone with a properly maintained gateway list could ping me at 44.4.36.1 and let me know the result, I'd appreciate it. Thank you, Blaine -- Blaine Forbort, K1QV Vallejo California

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Re: [44net] gateways sunset
by kb9mwr＠gmail.com 01 Aug '13

01 Aug '13

I am okay with that. When or is someone working on cleaning the DNS up next? 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. I gave it a quick try before, as it 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/rbFuTeVi It's not quite working, maybe someone who knows more can fix it? If no one else is working on this, and it would seem helpful, please let me know, and I'll try and devote some time to it again. Steve, KB9MWR

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Re: [44net] ampr.org DNS name add and update ?
by Wm Lewis 31 Jul '13

31 Jul '13

Hello Miro: Your local Coordinator can set that up for you. > Hello, > How can you add a name ampr.org as lz4ny.ampr.org be directed to IP > 44.185.1.1 tried by portal.ampr.org but it does not. > We will be happy to direct me where I can find more detailed information about the entry of names in ampr.org or setup dns server in Debian can add and edit names zone Bulgaria - 44.185.xx > > > 73, Miro, LZ4NY

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ampr.org DNS name add and update ?
by lz4ny＠mail.bg 31 Jul '13

31 Jul '13

Hello, How can you add a name ampr.org as lz4ny.ampr.org be directed to IP 44.185.1.1 tried by portal.ampr.org but it does not. We will be happy to direct me where I can find more detailed information about the entry of names in ampr.org or setup dns server in Debian can add and edit names zone Bulgaria - 44.185.xx 73, Miro, LZ4NY ------------------------------------- Mail.BG: Безплатен e-mail адрес. Най-добрите характеристики на българския пазар - 20 GB пощенска кутия, 1 GB прикрепен файл, безплатен POP3, мобилна версия, SMS известяване и други. http://mail.bg

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amprgw bandwidth
by Neil Johnson 30 Jul '13

30 Jul '13

Brian, How much bandwidth do you see coming from the Internet to amprgw on a daily basis ? Thanks. -Neil -- Neil Johnson -N0SFH http://erudicon.com

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Re: [44net] Distributed BGP Announce
by Rob Janssen 29 Jul '13

29 Jul '13

> Subject: > Re: [44net] Distributed BGP Announce > From: > Brian D Heaton <ky9k-lists(a)ky9k.org> > Date: > 07/29/2013 05:54 AM > > To: > AMPRNet working group <44net(a)hamradio.ucsd.edu> > > > My experience is with Cisco's "ip tcp adjust-mss xxx". It works 100% in all cases I've seen. Some very large deployed networks use that functionality. The only times we have issues is when folks remove that statement thinking it is redundant to > MTU size. (We set both) > > 73-KY9K/Brian > > > On 7/25/2013 8:59 AM, Marc, LX1DUC wrote >>> Also as it only really efficts TCP, I solve it on my GRE tunnels with >>> ip tcp adjust-mss 1436 in cisco >>> set interface $interface ip tcp adjust-mss 1436 in juniper >>> tcp-mss-adjust 1436 under an SDP config in Alcatel-Lucent >> >> What is your experience with that setup? Does it always (99.999% :-D) work? If so, count me in an let's go with it. >> >> 73 de Marc, LX1DUC I probably invented that :-) I introduced it into my version of NET (derived from KA9Q NET) in august of 1995, to avoid the fragmentation that frequently occurred when forwarding IP datagrams over NET/ROM transport. In my version, the MSS was automatically calculated from the MTU of the incoming and outgoing interface in the IP routing code. It worked very well. (MTU discovery did not exist back then) In 2001, Cisco introduced it in IOS and I realized I should have patented it :-) From changelog: PE1CHL.950819: TCP SYN packets are examined when routed, and the MSS option will be adjusted down to the maximum MSS possible on the incoming and outgoing interfaces. Thus, a more optimal end-to-end MSS is chosen, and fragmentation is avoided (e.g. when running IP over NET/ROM somewhere inbetween the endpoints) Rob

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On The Air
by Bill Vodall 29 Jul '13

29 Jul '13

So how are folks actually making use of all this nifty routing technology on the air with Amateur Radio these days? I don't remember the last time I've seen an "ampr.org" email address here on the list. I kinda remember the last time I had one that worked... Bill

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Re: [44net] Distributed BGP Announce
by Bryan Fields 29 Jul '13

29 Jul '13

On 7/25/13 2:59 AM, Marc, LX1DUC wrote: > By defautl GRE provides an Layer3 MTU of 1476 bytes. How will you cope > with packet fragmentation or in case DF=1 with ICMP type=3 code=4 (The > datagram is too big. Packet fragmentation is required but the 'don't > fragment' (DF) flag is on.) filtering. Yes, but this is why we have PMTUD. It works fine so long as ICMP is not blocked. If ICMP is blocked, then some one along the path needs to get some clue. I've only encountered this on private networks (LAN's, and packet cores where IT runs it). Generally it's fixed with me screaming "YOU'RE BREAKING THE INTERNET STUPID!" ;) Also as it only really efficts TCP, I solve it on my GRE tunnels with ip tcp adjust-mss 1436 in cisco set interface $interface ip tcp adjust-mss 1436 in juniper tcp-mss-adjust 1436 under an SDP config in Alcatel-Lucent 73's -- Bryan Fields 727-409-1194 - Voice 727-214-2508 - Fax http://bryanfields.net

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Receiving routes with conventional RIP
by Neil Johnson 29 Jul '13

29 Jul '13

Is it possible to get the IPIP routes delivered by conventional routing protocols (RIP, OSPF, etc) rather than running a custom daemon ? Just curious. -Neil -- Neil Johnson -N0SFH http://erudicon.com

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Tunnel issues with rip44d
by Neil Johnson 28 Jul '13

28 Jul '13

I can't seem to get rip44d to hear the routes. I'm sure I'm doing something dumb. Here is my /etc/networking/interfaces configuration: # Tunnel to amprnet auto tun0 iface tun0 inet static address 44.50.128.1 netmask 255.255.255.0 broadcast 44.50.128.255 pre-up iptunnel add tun0 mode ipip local 128.255.134.47 post-down iptunnel del tun0 If I run tcpdump on the tun0 interface I can see the routes coming down, but when I run rip44d it never hears them. I did I miss. I'm running ubuntu 12.04 LTS. Thanks. -Neil -- Neil Johnson -N0SFH http://erudicon.com

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