- Roundtable - muug.ca

How Long Can HDMI Cable be Run? -- Blue Jeans Cable
by Adam Thompson 05 Oct '15

05 Oct '15

http://www.bluejeanscable.com/articles/how-long-can-hdmi-run.htm -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

4 8

aRrgh: a newcomer's (angry) guide to R
by Adam Thompson 05 Oct '15

05 Oct '15

http://arrgh.tim-smith.us/ I wish I had known of this resource the last time I tried to use R for something. Maybe it will help someone else. -Adam -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

4 5

"ASCII to My Heart"
by Adam Thompson 04 Oct '15

04 Oct '15

https://cmcenroe.me/2015/09/27/ascii.html Some things I didn't know about ASCII. -Adam -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

1 0

Ringing voltage and waveform in Cisco/Linksys ATA's
by Hartmut W Sager 01 Oct '15

01 Oct '15

Why do these Cisco/Linksys ATA's have some stupid defaults? I just played with (er, configured) another one over the last weekend. I always (have to) change the default ringing voltage in these Cisco/Linksys ATA's from 85V trapezoidal to 90V sinusoidal, so that an attached phone will ring reliably. I don't know for which part of the planet (if any) their default is intended. From the standards I've studied in the past, the trapezoidal waveform especially doesn't ring a Bell. Hartmut W Sager - Tel +1-204-339-8331

2 1

Folder tree visualization
by Wyatt Zacharias 30 Sep '15

30 Sep '15

Does anyone know of a graphical folder tree visualization tool? Specifically one that can recognize symbolic links, and can stop at a specified folder depth? -- Wyatt Zacharias

4 4

aggregating dsl lines
by Trevor Cordes 30 Sep '15

30 Sep '15

Is it possible to aggregate DSL lines, to combine them to get X-times the bandwidth on a single link? In this situation, I control both ends, the DSLAM and the DSL modem side on the other end of some POTS runs (CAT3-ish I assume, or worse). Note, I don't want load balancing or fancy routing/sharing. I need double (or more) the bandwidth for a single application (single TCP connection). If required, we can have linux/bsd boxes we control at either end of the links. If it's not possible, does anyone have any other ideas for somehow getting better bandwidth out of 500m POTS wires (quantity 4)? Thanks!

6 10

Re: [RndTbl] aggregating dsl lines
by Brock Wolfe 29 Sep '15

29 Sep '15

Are there any reasons for not considering commercial (backbone) wireless gear for connecting points. It is a common practice for multi-building sites where project funds (or other constraints) prevent wired/fibre connections between buildings. On 9/29/2015 10:48 AM, roundtable-request(a)muug.mb.ca wrote: > Send Roundtable mailing list submissions to > roundtable(a)muug.mb.ca > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.muug.mb.ca/mailman/listinfo/roundtable > or, via email, send a message with subject or body 'help' to > roundtable-request(a)muug.mb.ca > > You can reach the person managing the list at > roundtable-owner(a)muug.mb.ca > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Roundtable digest..." > > > Today's Topics: > > 1. aggregating dsl lines (Trevor Cordes) > 2. Re: aggregating dsl lines (Colin Stanners) > 3. Re: aggregating dsl lines (Robert Keizer) > 4. Re: aggregating dsl lines (Adam Thompson) > 5. Re: aggregating dsl lines (Adam Thompson) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 29 Sep 2015 04:18:54 -0500 > From: Trevor Cordes <trevor(a)tecnopolis.ca> > To: MUUG RndTbl <roundtable(a)muug.mb.ca> > Subject: [RndTbl] aggregating dsl lines > Message-ID: <20150929091854.GA13606(a)pog.tecnopolis.ca> > Content-Type: text/plain; charset=us-ascii > > Is it possible to aggregate DSL lines, to combine them to get X-times the > bandwidth on a single link? In this situation, I control both ends, the > DSLAM and the DSL modem side on the other end of some POTS runs (CAT3-ish > I assume, or worse). > > Note, I don't want load balancing or fancy routing/sharing. I need double > (or more) the bandwidth for a single application (single TCP connection). > > If required, we can have linux/bsd boxes we control at either end of the > links. > > If it's not possible, does anyone have any other ideas for somehow getting > better bandwidth out of 500m POTS wires (quantity 4)? > > Thanks! > > > ------------------------------ > > Message: 2 > Date: Tue, 29 Sep 2015 07:09:51 -0500 > From: Colin Stanners <cstanners(a)gmail.com> > To: Continuation of Round Table discussion <roundtable(a)muug.mb.ca> > Subject: Re: [RndTbl] aggregating dsl lines > Message-ID: > <CAPoOROw+CvZAq_O2T+b0M7zukSEaydm10KzYCd6=fougATzkyg(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > At layers 2/3 you can do Multilink PPP or even something wierd and > questionably reliable like LACP over Ethernet-over-IP over the individual > connections, but given that it's only 500m and you control both ends the > best solution would likely be at > http://www.netsys-direct.com/Ethernet_Extenders_s/1814.htm , particularly > http://www.netsys-direct.com/product_p/nv-600ekit.htm > > On Tue, Sep 29, 2015 at 4:18 AM, Trevor Cordes <trevor(a)tecnopolis.ca> wrote: > >> Is it possible to aggregate DSL lines, to combine them to get X-times the >> bandwidth on a single link? In this situation, I control both ends, the >> DSLAM and the DSL modem side on the other end of some POTS runs (CAT3-ish >> I assume, or worse). >> >> Note, I don't want load balancing or fancy routing/sharing. I need double >> (or more) the bandwidth for a single application (single TCP connection). >> >> If required, we can have linux/bsd boxes we control at either end of the >> links. >> >> If it's not possible, does anyone have any other ideas for somehow getting >> better bandwidth out of 500m POTS wires (quantity 4)? >> >> Thanks! >> _______________________________________________ >> Roundtable mailing list >> Roundtable(a)muug.mb.ca >> http://www.muug.mb.ca/mailman/listinfo/roundtable >> >

2 1

Mr. Robot (on Showcase)
by Bradford C. Vokey 17 Sep '15

17 Sep '15

Further to my recommendation to watch "Mr. Robot": For those that don't get Showcase in your Shaw cable package, it seems that you can watch Mr. Robot on-line for free here: http://www.showcase.ca/video#mrrobot/video New episodes every Friday!

2 1

cheaper ISP
by Trevor Cordes 16 Sep '15

16 Sep '15

What's the cheapest option for a Winnipeg business to get decent (especially upload) internet access when they aren't in a Shaw area (but are in MTS). Right now they have MTS crappy like 5Mbps down and 400kbps up. It's horrible. We'd be fine with 5 or 10 (or more) down, but we want at least 2 up. The more up in our pricerange the better. Monthly traffic will be quite low in both directions, but we get large-demand bursts. Price range is $40-$80/month. They are willing to pay (a bit) more upfront to save on the monthly fee, if required. They need zero extra features (email boxes, web space, a/v, domain, etc), they just need faster internet. Lower latency than what garbage MTS gives would be better too. I already checked with MTS and what they want for more upload bw is way too much (compared to what Shaw charges). Thanks!

4 7

Linux capabilities vs setuid-root
by Gilbert E. Detillieux 16 Sep '15

16 Sep '15

I mentioned Linux capabilities (setcap/getcap commands) briefly during last night's round-table session, and Trevor mentioned that he thought that recent Fedora releases had eliminated the use of setuid-root binaries in favour of capabilities-based binaries. (That's the stated goal, in any case.) Not sure about the very latest Fedora/Rawhide releases, but here are the numbers on a Fedora 21 host I was able to quickly check... $ getcap /usr/*bin/*|wc -l 10 $ ls -l /usr/*bin/*|grep '^...s'|wc -l 21 $ ls -l /usr/*bin/*|grep '^......s'|wc -l 7 $ All of the setuid binaries (in the second command) are setuid-root. The setgid binaries (last command) have varying group ID's. For comparison, here are the numbers on an EL7 host... $ getcap /usr/*bin/*|wc -l 8 $ ls -l /usr/*bin/*|grep '^...s'|wc -l 23 $ ls -l /usr/*bin/*|grep '^......s'|wc -l 9 $ The difference in counts between the two hosts likely has more to do with specific packages loaded than with actual differences in the distros, though. Note that Linux capabilities are intended to grant only specific kernel-based rights that were otherwise restricted to root, so it likely won't eliminate all setuid/setgid use cases, without some more drastic coding solutions. Gilbert -- Manitoba UNIX User Group E-mail: <gedetil(a)muug.mb.ca> c/o Gilbert E. Detillieux Web: http://www.muug.mb.ca/ University of Manitoba Phone: (204)474-8161 Winnipeg MB CANADA R3T 2N2 Fax: (204)474-7609

4 3