Crazy Network Problem?! This is a weird one, folks - I’m stumped

I’m using Ubuntu Server & Virtualmin. Some external sites/domains are not reachable, whereas others are!

If I do a wget Wordpress.org or wget virtualmin.com I get an error saying:

      failed: Network is unreachable.

But if I do a wget yahoo or wget google - it works! Why the heck are some domains not working, whereas others are? I changed the DNS lookup server to 8.8.8.8 & 1.1.1.1 and am still having the issue! This is SO STRANGE! I feel like I’m losing my mind - I can’t figure this out! Any ideas what might be going on here?

Thank you!

Steve

Show us your network interfaces and routing/gateways.
You do have only one network card?

Tracert those names and see where the issue is. Looks like its called tracepath now.
Did you try installing worpress via virtualmin’s web apps did you get same issue?

I was going to suggest a trace but figured it would get nowhere if the network isn’t found.

Not sure, its says unreachable, not “isn’t found”. So presume it revolved the name ok but just can’t reach it.

First, thanks guys, for trying to help - I so SO much appreciate it!

Second, What’s strange is, I don’t think it’s a DNS issue, because it resolves the domain name to IP correctly - it just won’t connect to some sites, but others it will. I’m so lost and confused - I’m all out of ideas and possibilities. Any thoughts as to why it’s stopping some connections from going thru, yet others are blocked? It doesn’t have anything to do with my network/router, bc I can easily browse any of the sites from another computer.

Ugh. Thanks.

Exactly! It resolves the domain, but still says connection failed. Ugh. I’m so perplexed!

Again, it’s not entirely “broken”, which is the strange part - some domain work fine, others do not. I was using Virtalmin to install Wordpress on one of my virtual servers, and it couldn’t go out to Wordpress to get the install package. But something MUST have changed, because it worked fine on the first site I setup weeks ago.

That’s not a DNS error, I can’t imagine how that would do anything.

Try pinging your gateway, and then the IP of some host outside of your local network as starting points for figuring out where things are going wrong.

No, it’s not a DNS issue. Here is showing traceroute to my gateway, traceroute to Google.com (which both worked fine) and finally a trace to Wordpress which bombed. I’m so stumped. Ugh.

It was working on yahoo.com then, didn’t.

Do you have functioning IPv4 either locally or via a gateway?

need ip4 for that domain

Sure. Yeah. Like I said - some domains work, others do not. I don’t understand that at all.

Yep. Same IP my server shows for Wordpress.org. It just won’t load/access/ connect to it! Damn. I finally got rockin and rollin on the development, now I’m gonna have to take 10 steps back and go back to square one and reinstall and resetup my whole damn server just over this crazy little weird thing. Except for this, everything is working how I need and want it to. Shit. It’s my first attempt at running my Linux web server locally, instead of paying a web host, and I’ve had so many headaches, and I had thought I finally had everything right and could now focus on my websites, but nooooo…screw that - the universe ain’t gonna let THAT happen! Ugh. SMH

Thanks, guys, for trying. This one is too crazy to figure out, I guess. I’m gonna have to blow the thing up. Crap.

It’s gotta be something SIMPLE!

While wget virtualmin.com fails, wget software.virtalmin.com DOES connect! WTF??

I’m gonna sleep on it before restarting. I hope someone can help shed a little light on this. I’m going nuts here. Ugh. No clue what’s happening.

Thanks, guys.

I have a hint for you:

joe@kate:~/Downloads$ host software.virtualmin.com
software.virtualmin.com has address 51.158.66.131
software.virtualmin.com has IPv6 address 2001:bc8:710:9a94:dc00:ff:fe82:8d31
joe@kate:~/Downloads$ host virtualmin.com
virtualmin.com has address 45.76.57.243
virtualmin.com mail is handled by 5 mail.virtualmin.com.

And, I think we answered this question: Crazy Network Problem?! This is a weird one, folks - I’m stumped - #12 by Joe

And, to go further, you can’t run a server on a system that doesn’t have a working path to all routable IPv4 addresses.

Having a public IPv4 address is also probably wise (though less important than it used to be, you’re going to have problems with some users being unable to reach you). e.g. my home network:

joe@kate:~/Downloads$ ping 2001:bc8:710:9a94:dc00:ff:fe82:8d31
ping: connect: Network is unreachable

I appreciate your input, Joe - but see, the thing is, everything WAS working fine and all hosts were reachable. And now, they’re not. I’d love to know what would cause this, so I can fix it/set it back to how it was when it was working fine recently, so I don’t have to resetup my whole dang server. The only thing I’ve been using is Virtualmin to administer and setup my server.

I noticed something was different/wrong when I recently tried to install Wordpress on my 2nd virtual server. It worked fine for the first one, now, it won’t download Wordpress. I can’t access Wordpress .org, nor Virtualmin .com, but other external sites, no problem. I have no idea WHAT recent setting change could cause this. Ugh.