411 reputation
210
bio website
location California
age
visits member for 4 years, 9 months
seen Oct 25 '13 at 22:48

I started with computers when I was 14 and became a computer professional at age 17 when I wrote a real-time multi-tasking operating system for ship, pipeline and refinery control while attending Tulane University in New Orleans.

From there, at 19 I passed on jobs at Apple and Microsoft (in '83) to join Digital Equipment Corporation where I helped found two support businesses for them.

I then joined Relational Technology Inc. (later Ingres Corp), and, as a direct report to the Sr. VP of Sales, performed just about every technical role in the company, curriculum development, consulting, technical support, development, benchmarking, created Demos, represented the company at trade shows, etc, and I even helped sell the product.

After a while as an independent consultant, Professor Michael Stonebraker invited me to lead a research team at UC Berkeley's Electronics Research Laboratory wherein I developed the world's first "Grid" computing system - which was also the first truly heterogeneous distributed computing system, today known as "cloud computing."

In '97 I commercialized the work and founded several companies where today I have a split life as "executive" and technical wizard - in short, I serve as chief cook and bottle washer. I'm a jack of trades, and specialize in computing performance and heterogeneity with an eye toward production work, stability, maintainability and up-time performance.

In the last few years I have become involved with life-sciences computing, and last year served as CTO / VP Engineering of a company bringing health-information to the masses, but unfortunately that venture folded due to what I will politely call, "capitalization issues."


Sep
18
answered firewalld: trouble forwarding port 25 while other ports forward just fine, “rich rule” logging shows NO entries
Sep
18
answered Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Sep
18
comment Cannot reach website from outside of LAN
I haven't any good suggestion - except to be thorough - and I don't care all that much one way or there the other (just mildly curious), but I'm giving your question an up-vote because I think it's terrible some people down-vote what they perceive as novice questions - frankly, you've got a lot more clue than some I've seen! Good luck...
Sep
18
comment firewalld: trouble forwarding port 25 while other ports forward just fine, “rich rule” logging shows NO entries
@MichaelHampton ...I'm stupified!... I help out the Postgres open-source project, and for us the idea of putting out a release that wasn't darned stable is unthinkable - I guess the OS guys aren't as careful! Keep in mind that firewalld is the_default firewall software! ...But I appreciate you making the point. Know of any method to convert the firewalld rules to IP-Tables?
Sep
18
asked firewalld: trouble forwarding port 25 while other ports forward just fine, “rich rule” logging shows NO entries
Feb
1
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
@MichaelHampton The point is I'm NOT applying to eth0 and 1, those interface names aren't even used on my box AT ALL. The script I posted was from the old, original system and, before I just edited it recently, it said exactly that, but I updated it a little to TRY and be briefer and include comments on things I'd tried. Again, any comment on the ACTUAL problem?
Feb
1
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
@MichaelHampton "...your question doesn't reflect the changes you claim to have made." Ugh. OK. Any ideas on the actual problem? This seems simple enough, WAS working and now I'm completely "dead in the water," we're not receiving emails for WAY too long, people are upset. I guess it worked by magic before. -shrug- In particular, as netstat -ln doesn't show a local use of port 25, I don't get why it's not forwarding on the second system I scrounged up. The first one seems to ONLY forward with the wrong interface masqueraded?!
Feb
1
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
@MichaelHampton ...I'm not that dumb / ignorant / etc; I of course have been trying that for days. No joy. My suspicion is that the name I see from ifconfig isn't the same as what iptables wants to use. I sourced up another system that's older and doesn't have the name issue and it at least port-forwards correctly - except for port 25 and I'm not sure why (it doesn't have sendmail, etc)...
Feb
1
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
@MichaelHampton MAYBE YOUR HUNCH WAS CORRECT: after more hours than I'd like to admit trying to get this system working correctly, I've come to think that maybe you are on to something. Here are some other thoughts: serverfault.com/questions/474449/… Any suggestions?
Feb
1
revised Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Better english / small typos.
Feb
1
revised Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Reflect new understanding of the problem
Jan
31
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Sorry again - I must be TERRIBLE at communication today: On your observation I switched the interfaces used in that statement, from -o eth0 to -o eth1 and THAT is when "no packets get passed at all." So when you ask "where's the rule", my answer is that I just switched interfaces - isn't THAT what was my error?!?! CLEARLY the original script had one or the other - I didn't do a damned thing to it (knowingly). Sorry to be less than clear; NEITHER masquerade works as hoped: one passes zero (no forwards), the other forwards but masquerades the wrong direction.
Jan
31
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Sorry; connections from the external interface should be either explicitly forwarded to the internal interface (as outlined above, ports 222 and 25) or are either locally accepted (only 22) or rejected. All connections from the internal interface should either be locally accepted (only port 22) or masqueraded on the external interface. This same set of rules was formerly doing just that, except for any errors I just introduced. Thanks for your thoughts / observations.
Jan
31
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Thanks, David, ... I feel sooooooo silly! BUT, when I do that - eliminate the rule or change it to the actual OUTBOUND interface - no packets get passed at all. Any suggestions?
Jan
30
comment Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
@MichaelHampton Yes, I think so: I cut and pasted from "ifconfig" output. Shouldn't that do it?
Jan
30
asked Confusion Post FedoraCore Upgrade: NAT / port forwarding trouble, and POSTROUTING MASQUERADE has unexpected influence on forwarding ports
Jan
29
answered mount.nfs: access denied by server while mounting (Kerberos authentication)
Mar
16
comment postfix pop-before-smtp isn't parsing the log correctly - need PERL help, I think
Sorry, but when you say "which you haven't done," you're wrong. The problem was solved a few days ago. You know, condesention to people you're writing to / about isn't flattering to one's self.
Mar
15
comment customizable web email client backend
@DavidCaccavella OOPS! After writing the update to my answer I just posted, I re-read your question and just realized I thought you were coding in PHP, but if it's an ajax front end, then switch to use JavaMail!
Mar
15
revised customizable web email client backend
addressing comments made by the question asker