Score:0

Ubuntu

ssh tunnel for 443

genderbee

10/18/22, 1:45 PM

I need get a file by a link (443), which is only possible from server B.

I have 3 servers, (A B C).

It is possible to access server B and download this file by wget from server C.

wget https://NAME:[email protected]/customerInfo/804-577823-10 --no-check-certificate
...
2021-06-18 16:18:01 (24,7 MB/s) - ‘804-577823-10’ saved [163/163]

From A to B, it is only allowed to use for port 22 (ssh), not port 443.

I need to make a tunnel, which will go through from A to B via 22 and download the file from C via wget port 443, exact the same way, as if I were on server B.

In short, I need a ssh tunnel from A to B and then I need to use port 443, for apply/download the file on C via wget from A, same way as on B.

I tried, but no success.

ssh -L 4433:C:443 -Nf B

I tried even with proxy, but no success.

wget -e use_proxy=yes -e http_proxy=C https://NAME:[email protected]/customerInfo/804-577823-10 --no-check-certificate

Is it possible?

Thank you.

UPDATE

SERVER_A:443 -> ssh tunnel by port 22 through SERVER_B -> SERVER_C:443

So if I use on SERVER_A same link as on SERVER_B, I want to get file by wget from SERVER_C.

Simplest way is allow port 443 on SERVER_C for SERVER_A, but it is not possible in this case.

Allowed is only port 22 between SERVER_A and SERVER_B.

It is clearest now?

Thanks.

227

1 + 0

ssh

ssl

tunnel

Score:2

Ubuntu

Whois_me

10/18/22, 2:05 PM

It depends on who owns the servers in terms of permissions in order to determine what you are able to do. Also, what i do not quite understand is if this a one time download or you are in need of a permanent solution.

After reading your question I would go into server B with a secure shell.

$ ssh user@serverB

Then download the file from there. ( The point at the end is important)

$ scp -P 443 user@serverC:/path/to/file.txt  .

After this you can get send it to server A

$ scp file.txt user@serverA:~/

There are also more sophisticated solutions but it depends on your needs and freedom to act.

Update:

You can send a command to the server over ssh.

ssh user@serverB "wget your file at C"

You could do a double command like:

ssh user@serverB "wget your file @C:443  && scp file.txt you@serverA:~/"

But then you need to have serverB have his public certificates installed at serverA to go pass-wordless. The alternative is a 2 command script like explained above.

0 + 12

genderbee

10/18/22, 2:11 PM

Hello, yes, I know, but I need direct access to this link/file which is on **C** server from **A** server, so I need to configure **A** server so that link from **C** server to be accessible on **A** server. Is it posstible to do it through ssh tunnel?

Whois_me

10/18/22, 2:14 PM

Do you own server B ?

genderbee

10/18/22, 2:31 PM

Yes, I can do anything on server B, but not on C, so I can't allow access from server A to C directly via port 443.

Thomas Ward

10/18/22, 2:33 PM

@genderbee then you have to go the indirect way - scp it to server B, then scp from server B to server A. If you don't own A or C then you really should be talking to their admins because they may not *want* A and C to have any file transfer.

Whois_me

10/18/22, 3:18 PM

@genderbee. Although I like the challenge of tunneling computers through the matrix, I really am wondering what you are trying to achieve.

genderbee

10/19/22, 10:23 AM

@rm- It is simple, I just want to configure server **A** to get file by `wget` link (port 443) same way, as I would be on server **B**, using by tunnel (or proxy?). Now, when I try `wget` on server **A**, connection is refused even ssh tunnel is up.

genderbee

10/19/22, 10:31 AM

@rm- See question update please.

Whois_me

10/20/22, 9:40 AM

Yes I understand your question. Does my answer resolves your question? If not, you should look at other solutions then wget I guess. Hence my additional question. What are you REALLY trying to to? So we can help outside the scope of your question.

genderbee

10/21/22, 7:06 AM

@rm- I have app based on PHP and this app is using wget call, so it is needed use by `wget`. Still no success.

Whois_me

10/21/22, 7:18 AM

Ok let's do this step by step. Can you wget your file when you are logged in server B? Look at: https://www.gnu.org/software/wget/manual/wget.html#URL-Format

genderbee

10/21/22, 8:19 AM

@rm- Yes, I can. Server B is prod, so it is possible to get link by port 443 from server C. Server A is test, and there is no possibility to get link by port 443 from server C. I have only port 22 allowed between server A and B. How can I make on server A (test) functional port 443 for needed link (server C) via tunnel through port 22?

Whois_me

10/21/22, 1:27 PM

Next step: Add in this wget command in the ssh command. Like in ssh user@serverB "wget command to server C" and execute on A. This should work. You can test the AB connection first with ssh@user "touch test.txt". There should be a new file "test.txt" present inside server B ( /home/user ) after this command.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: ssh tunnel for 443

TH: อุโมงค์ ssh สำหรับ 443

RO: tunel ssh pentru 443

RU: ssh-туннель для 443

VI: đường hầm ssh cho 443

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