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VPN and tailscale blocked on hotel wifi

I’m travelling for the moment, and usually I just access my home network with tailscale and it has always worked flawlessly. But the hotel I’m staying at apparently blocks VPN connections, I can’t use my regular VPN for work on their network either and I’ve tried obfuscation,different ports etc. nothing seems to work and it never connects.

How can I circumvent this, if at all? I’m staying for several weeks, so this is a pretty bug issue.

ShortN0te ,

That is why i have everything that needs to be accessible, is reasonably secure and is not critical like management interfaces exposed.

You could try to http proxy your connection. As soon as the connection is then encrypted with https no firewall can block it.

The firewall probably blocks everything except port 80 and 443 and every protocol except tcp and udp.

Decronym Bot , (edited )

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:

Fewer Letters More Letters
DNS Domain Name Service/System
HTTP Hypertext Transfer Protocol, the Web
HTTPS HTTP over SSL
IMAP Internet Message Access Protocol for email
IP Internet Protocol
SMTP Simple Mail Transfer Protocol
SSL Secure Sockets Layer, for transparent encryption
TCP Transmission Control Protocol, most often over IP
VPN Virtual Private Network

[Thread for this sub, first seen 21st Aug 2024, 06:45] [FAQ] [Full list] [Contact] [Source code]

Max_P ,
@Max_P@lemmy.max-p.me avatar

Best bet is probably going to be using something like OpenVPN on port 443 in TCP mode, which basically looks like regular HTTPS. It’s a hotel, I doubt they’re going to be doing deep analysis to detect signs it’s OpenVPN. It’s detectable easily but they wouldn’t spend the money on that advanced of a firewall.

My guess is they went for an allowed list of ports rather than blocked, so it lets DNS (53), HTTP (80), HTTPS (443), probably also POP/IMAP/SMTP (110, 995, 143, 993, 465)

StevenSaus ,
@StevenSaus@midwest.social avatar

You could try using a relay somewhere in your process; while I was on a travel gig I had to do some finicky work with a travel router (though this may not work, since you need a VPN for your work, but maybe it’ll give you an idea: ideatrash.net/…/howto-secure-and-share-your-inter…

Also if you have your DNS resolvers manually put in, you may not encounter their portal. Had that problem when on hotel wifi as well.

All that said, I ended up using phone data a lot.

TheHolm ,
@TheHolm@aussie.zone avatar

Usually it can be solved by talking to hotel stuff. you are paying for that service and can expect it be suitable for any legal use.

Nurgus ,

Talking to hotel staff. About networking. Yeah… uh… Good luck!

breakingcups ,

Have you passed their captive portal before turning on the VPN?

ExcessShiv OP ,

I haven’t encountered a captive portal at all. I can use the internet just fine without VPN.

SaintWacko ,

This was years ago, but I had a similar issue of not being able to SSH in a hotel. I talked to the front desk and they were able to grant me access to a different network that didn’t have that blocked. I can’t remember whether I had to pay for it or not…

Mikelius ,

I’ve had this issue many times as well. I’ve found changing the MTU would help since it seems some filter specific ranges. Doesn’t always work but I’ve had more success than failure doing so

ExcessShiv OP ,

I’ll give that a go

Nurgus ,

MTU 1280 fixes all MTU problems, at a cost to performance.

superkret ,

When you use someone else’s internet, there’s nothing you can really do. Maybe rent a VPS and set it up as relay.

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