Re: [GTALUG] Updating my mailserver
On Mon, 31 Aug 2020 at 22:13, William Witteman via talk wrote: > I have run a mailserver for my domains for a long time. I have not > thought about its ability to send outbound mail for a while though, > and my logs tell me what my experience already suggested - it cannot > send email to Gmail (and probably lots of other places). > If you want your outbound messages to reach Gmail users, you need to send authenticated messages and your reverse DNS must be set up correctly: https://support.google.com/mail/answer/81126 If you can't set up reverse DNS on IPv6, disable IPv6 in your Postfix configuration. Gmail will reject your messages that are sent over IPv6 unless you have the reverse DNS working correctly for IPv6. In my experience, if you acquire your IP address from a pool of addresses at your ISP over DHCP, your outbound messages will most likely be doomed as suspected spam. You need to have a static IP address that is not blacklisted: check out http://multirbl.valli.org/ --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Updating my mailserver
On Mon, 31 Aug 2020 22:13:18 -0400 William Witteman via talk wrote: > I have run a mailserver for my domains for a long time. I have not > thought about its ability to send outbound mail for a while though, > and my logs tell me what my experience already suggested - it cannot > send email to Gmail (and probably lots of other places). William, I use my ISP to send emails. I have used a local mail server to send emails in the distant past, and it has been filtered out by spam filters. Recently, I sent out a batch of emails with a reply-to address, and that got filtered. In 1998, my ISP service changed its URL from echo-on.net to eol.ca. I am still getting spam for hgib...@echo-on.net. -- Howard Gibson hgib...@eol.ca jhowardgib...@gmail.com http://home.eol.ca/~hgibson --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Updating my mailserver
On 2020-08-31 10:13 p.m., William Witteman via talk wrote: I have run a mailserver for my domains for a long time. I have not thought about its ability to send outbound mail for a while though, and my logs tell me what my experience already suggested - it cannot send email to Gmail (and probably lots of other places). Do you have DKIM and SPF records set for your domains? For Google there is a google-site-verification TXT entry string to be added to the DNS records. -- Cheers! Kevin. http://www.ve3syb.ca/ | "Nerds make the shiny things that https://www.patreon.com/KevinCozens | distract the mouth-breathers, and | that's why we're powerful" Owner of Elecraft K2 #2172 | #include | --Chris Hardwick --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Generic SSH question.
I had luck running wireguard on a VPS and u b connecting my servers to it. It can traverse NAT without issues, but I b never tested with corporate proxies or firewalls. So when I have to run errands, I connect my phone to wireguard and run vnc viewer to connect to my work computer. On Mon, Aug 31, 2020, 20:36 Alvin Starr via talk wrote: > On 8/31/20 6:46 PM, Tim Tisdall wrote: > > On Mon, 31 Aug 2020 at 11:28, Alvin Starr via talk > wrote: > >> Does anybody know of a software package or service that does for SSH the > >> kind of thing that teamviewer does? > >> > >> I run into linux systems that are behind firewalls and trying to bounce > >> through some windows box using teamviewer or other screen sharing app is > >> getting real old. > > It's been a long time since I've used it, but Chrome Remote Desktop is > > pretty good and I think will work on most systems. I'm not sure how > > it compares to TeamViewer, but I think it uses Google servers to > > facilitate connections behind firewalls. It's pretty easy to use, > > too, as you don't need to know IP addresses. > > https://remotedesktop.google.com/ > That is kind of the opposite of what I am looking for. > > A lucky search found me something called teleconsole. which looks to be > what I want. > I would rather run the bastion server also but this has got to be better > than bouncing through a windows box. > > -- > Alvin Starr || land: (647)478-6285 > Netvel Inc. || Cell: (416)806-0133 > al...@netvel.net || > > --- > Post to this mailing list talk@gtalug.org > Unsubscribe from this mailing list > https://gtalug.org/mailman/listinfo/talk > --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Generic SSH question.
On 8/31/20 6:46 PM, Tim Tisdall wrote: On Mon, 31 Aug 2020 at 11:28, Alvin Starr via talk wrote: Does anybody know of a software package or service that does for SSH the kind of thing that teamviewer does? I run into linux systems that are behind firewalls and trying to bounce through some windows box using teamviewer or other screen sharing app is getting real old. It's been a long time since I've used it, but Chrome Remote Desktop is pretty good and I think will work on most systems. I'm not sure how it compares to TeamViewer, but I think it uses Google servers to facilitate connections behind firewalls. It's pretty easy to use, too, as you don't need to know IP addresses. https://remotedesktop.google.com/ That is kind of the opposite of what I am looking for. A lucky search found me something called teleconsole. which looks to be what I want. I would rather run the bastion server also but this has got to be better than bouncing through a windows box. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 al...@netvel.net || --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Generic SSH question.
On Mon, 31 Aug 2020 at 11:28, Alvin Starr via talk wrote: > Does anybody know of a software package or service that does for SSH the > kind of thing that teamviewer does? > > I run into linux systems that are behind firewalls and trying to bounce > through some windows box using teamviewer or other screen sharing app is > getting real old. It's been a long time since I've used it, but Chrome Remote Desktop is pretty good and I think will work on most systems. I'm not sure how it compares to TeamViewer, but I think it uses Google servers to facilitate connections behind firewalls. It's pretty easy to use, too, as you don't need to know IP addresses. https://remotedesktop.google.com/ --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Generic SSH question.
On 8/31/20 3:24 PM, D. Hugh Redelmeier via talk wrote: | From: Alvin Starr via talk | | Does anybody know of a software package or service that does for SSH the kind | of thing that teamviewer does? | | I run into linux systems that are behind firewalls and trying to bounce | through some windows box using teamviewer or other screen sharing app is | getting real old. Teamviewer is a screen sharing service where the screen sharing is handled through a middleman. I start teamviewer and give someone a token so that they can access my screen. It works behind masqueraded firewalls. I don't know what teamviewer does. Can you explain? Particularly in the scenario you are talking about. In this case someone wants me to connect to teamviewer so that I can access their screen on a windows desktop. Where I can use putty or some other terminal client to access the linux server. Windows boxes now have ssh. And they can have a large chunk of certain Linux distros. But they do ssh natively out-of-the-box. True but windows users like to pay for GUI services. I've only use ssh as a client on Window with Windows. But surely Windows has an ssh server too (what would the shell be? PowerSell? cmd.exe?). I believe that Windows also has a powershell service that is like SSH. But still this requires some kind of port forward to get through the firewall. Why would you bounce through a Windows box? Surely Windows is a bad choice for a gateway. Lots of people think Windows boxes are fine: Its not my choice. I would rather poke myself in the eye than have to deal with a windows server. But I like to eat and that means I need to do what the paying customers want. 1) on a desktop (not me) 2) on a server for services that are designed to run on Windows. But not a gateway/router. --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 al...@netvel.net || --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
Re: [GTALUG] Generic SSH question.
| From: Alvin Starr via talk | | Does anybody know of a software package or service that does for SSH the kind | of thing that teamviewer does? | | I run into linux systems that are behind firewalls and trying to bounce | through some windows box using teamviewer or other screen sharing app is | getting real old. I don't know what teamviewer does. Can you explain? Particularly in the scenario you are talking about. Windows boxes now have ssh. And they can have a large chunk of certain Linux distros. But they do ssh natively out-of-the-box. I've only use ssh as a client on Window with Windows. But surely Windows has an ssh server too (what would the shell be? PowerSell? cmd.exe?). Why would you bounce through a Windows box? Surely Windows is a bad choice for a gateway. Lots of people think Windows boxes are fine: 1) on a desktop (not me) 2) on a server for services that are designed to run on Windows. But not a gateway/router.--- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
[GTALUG] Generic SSH question.
Does anybody know of a software package or service that does for SSH the kind of thing that teamviewer does? I run into linux systems that are behind firewalls and trying to bounce through some windows box using teamviewer or other screen sharing app is getting real old. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 al...@netvel.net || --- Post to this mailing list talk@gtalug.org Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
