Hey all--I'm experiencing increasing delays in resolving the hostname when I connect to my board and I'm curious if anyone has any tips on how I can clear them up. I'm currently having SBBS restart services after a user logs off (and checking that no other users are logged in). Here's the rest of how I have it set up:

-A domain from GoDaddy with a DNS record pointing to,
-A hosted Ubuntu VPS serving as a static IP that leads to,
-A reverse SSH tunnel from a Win 10 32-bit VM to the VPS

If I try to sign on right after signing off, the board responds immediately. The longer the board goes without a call, the longer the hostname resolution takes. Regardless of final resolution time, I get the initial Synchronet version statement at the top of the screen right away.

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þ Synchronet þ The Harbor - telnet.harborbbs.com - Gen X Foreva!

Re: Hostname resolution delay
By: Bragi to All on Mon May 05 2025 01:59 pm

Hey all--I'm experiencing increasing delays in resolving the hostname when I connect to my board and I'm curious if anyone has any tips on how I can clear them up.

Are you sure it's hostname lookup that's taking time? If you disable hostname lookups in the Terminal Server, does the delay go away?

What the size of your text/host.can and text/*ip.can files?

I'm currently having SBBS restart services after a user logs
off (and checking that no other users are logged in). Here's the rest of how I have it set up:

-A domain from GoDaddy with a DNS record pointing to,
-A hosted Ubuntu VPS serving as a static IP that leads to,
-A reverse SSH tunnel from a Win 10 32-bit VM to the VPS

If I try to sign on right after signing off, the board responds immediately. The longer the board goes without a call, the longer the hostname resolution takes. Regardless of final resolution time, I get the initial Synchronet version statement at the top of the screen right away.

There's a Synchronet version statement upon initial connect and before hostname lookup:
Synchronet BBS for Win32 Version 3.21
Telnet connection from: 2600:6c88:8c40:5b::14e
Resolving hostname...

After the hostname has been resolved and confirmed to not be blocked (e.g. via host.can file), then there's a screen clear and another Synchronet version/copyright notice:
Synchronet BBS for Win32 Version 3.21 Copyright 2025 Rob Swindell
--
digital man (rob)

This Is Spinal Tap quote #3:
How much more black could this be? and the answer is none. None more black. Norco, CA WX: 60.5øF, 77.0% humidity, 8 mph W wind, 0.33 inches rain/24hrs
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Re: Hostname resolution delay
By: Digital Man to Bragi on Mon May 05 2025 02:18 pm

Hey DM--thanks as always for your time and help.

Are you sure it's hostname lookup that's taking time? If you disable hostname lookups in the Terminal Server, does the delay go away?

I believe it's the hostname lookup. I disabled it just a minute ago and will monitor it.

What the size of your text/host.can and text/*ip.can files?

They're just a few lines long, each, with what look to be the default, commented-out lines with semi-colons.

There's a Synchronet version statement upon initial connect and before hostname lookup:
Synchronet BBS for Win32 Version 3.21
Telnet connection from: 2600:6c88:8c40:5b::14e
Resolving hostname...

Yeah, this is where the delay gets longer and longer. An extra note. Whenever I connect, the "Telnet connection from:" always shows as "::1"

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þ Synchronet þ The Harbor - telnet.harborbbs.com - Gen X Foreva!

Re: Hostname resolution delay
By: Bragi to Digital Man on Mon May 05 2025 07:21 pm

There's a Synchronet version statement upon initial connect and before hostname lookup:
Synchronet BBS for Win32 Version 3.21
Telnet connection from: 2600:6c88:8c40:5b::14e
Resolving hostname...

Yeah, this is where the delay gets longer and longer.

That's weird. Doesn't seem like a Synchronet issue, to be honest.

An extra note.
Whenever I connect, the "Telnet connection from:" always shows as "::1"

::1 is the IPv6 address of localhost/loopback (IPv4 127.0.0.1).
--
digital man (rob)

Synchronet/BBS Terminology Definition #11:
C64 = Commodore 64 (personal computer)
Norco, CA WX: 57.9øF, 85.0% humidity, 5 mph WNW wind, 0.33 inches rain/24hrs ---
þ Synchronet þ Vertrauen þ Home of Synchronet þ [vert/cvs/bbs].synchro.net

Re: Hostname resolution delay
By: Digital Man to Bragi on Mon May 05 2025 05:24 pm

That's weird. Doesn't seem like a Synchronet issue, to be honest.

Yeah, I wasn't sure. It's just weird that the delay happens only after I see the initial Synchronet version stamp. The delay seems to still be present even with hostname lookup disabled. I re-enabled it. I'm still trying to figure out why the delay goes away after I restart the board's services.

::1 is the IPv6 address of localhost/loopback (IPv4 127.0.0.1).

I'm very puzzled by this, especially since I'm connecting through a domain routed to a hosted VPS, which only then is making it to my home network. Regardless, I may try to confirm all IPv6 stuff is disabled everywhere (I thought I already had).

Thanks again

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þ Synchronet þ The Harbor - telnet.harborbbs.com - Gen X Foreva!

Re: Hostname resolution delay
By: Bragi to Digital Man on Mon May 05 2025 07:21 pm

Re: Hostname resolution delay
By: Digital Man to Bragi on Mon May 05 2025 02:18 pm

Hey DM--thanks as always for your time and help.

Are you sure it's hostname lookup that's taking time? If you disable hostname lookups in the Terminal Server, does the delay go away?

I believe it's the hostname lookup. I disabled it just a minute ago and will monitor it.

just turn off the hostname lookup. with some bbses it takes a bit too long. you don't really need it. you have the ip addy.
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Re: Hostname resolution delay
By: Bragi to Digital Man on Mon May 05 2025 09:36 pm

I'm very puzzled by this, especially since I'm connecting through a domain routed to a hosted VPS, which only then is making it to my home network. Regardless, I may try to confirm all IPv6 stuff is disabled everywhere (I thought I already had).

what the fuck. why are you doing that.
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þ Synchronet þ ::: BBSES.info - free BBS services :::

Re: Hostname resolution delay
By: MRO to Bragi on Tue May 06 2025 12:48 am

I'm very puzzled by this, especially since I'm connecting through a domain routed to a hosted VPS, which only then is making it to my home network. Regardless, I may try to confirm all IPv6 stuff is disabled everywhere (I thought I already had).

what the fuck. why are you doing that.

Why am I doing what? Using a domain with my bbs? lol.. Silly question. Unless you're asking about the hosted VPS, which is just for a static IP since I have Starlink as an ISP, which uses CGNAT and doesn't give its users a public IP of any kind.

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þ Synchronet þ The Harbor - telnet.harborbbs.com - Gen X Foreva!

Re: Hostname resolution delay
By: Bragi to MRO on Tue May 06 2025 07:39 am

what the fuck. why are you doing that.

Why am I doing what? Using a domain with my bbs? lol.. Silly question.

"I'm very puzzled by this, especially since I'm connecting through a domain routed to a hosted VPS, which only then is making it to my home network. "

what you mean is 'only then is making it to my home network"
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Re: Hostname resolution delay
By: MRO to Bragi on Tue May 06 2025 05:06 pm

what you mean is 'only then is making it to my home network"

I'm hosting the BBS on a VM on a NAS

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þ Synchronet þ The Harbor - telnet.harborbbs.com - Gen X Foreva!