Can curl make a connection to any TCP ports … – Stack Overflow
Can curl make a connection to any TCP ports not just HTTP/HTTPS
I need to check for an open port, for example: 11740.
Is this possible?
asked Dec 6 ’13 at 22:22
Yes, it’s possible, the syntax is curl [protocol]
curl
If you’re using Bash, you can also use pseudo-device /dev files to open a TCP connection, e. g. :
exec 5<>/dev/tcp/127. 0. 1/1234
echo “send some stuff” >&5
cat <&5 # Receive some stuff.
See also: More on Using Bash's Built-in /dev/tcp File (TCP/IP).
answered Feb 11 '16 at 12:21
kenorbkenorb125k68 gold badges605 silver badges641 bronze badges
Of course:
curl curl
Port 80 and 443 are just default port numbers.
answered Dec 6 '13 at 22:30
user2926055user29260551, 8029 silver badges10 bronze badges
Since you're using PHP, you will probably need to use the CURLOPT_PORT option, like so:
curl_setopt($ch, CURLOPT_PORT, 11740);
Bear in mind, you may face problems with SELinux:
Unable to make php curl request with port number
answered Dec 7 '13 at 1:33
brandonscriptbrandonscript59. 4k29 gold badges145 silver badges206 bronze badges
Not the answer you're looking for? Browse other questions tagged php curl or ask your own question.
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How to specify the SSL port with command line curl? – Server …
I’m trying to test the SSL connection on one of my servers. The server is behind a load balancer (LB) so it’s listening for SSL connections on the port 8090.
I have use the –resolve option to test when talking to the LB which listens on port 443.
curl –resolve ” ”
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curl simply ignores the port and goes with 443. Of-course, this causes the DNS cache to miss and I end-up using the public DNS IP…
* Added to DNS cache
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* Trying 3. 3. 3…
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How can I force curl to use the port 8090 for an SSL connection?
Thanks.
asked Oct 1 ’13 at 0:50
4
Tested with curl 7. 22. 0 (x86_64-pc-linux-gnu) libcurl/7. 0 OpenSSL/1. 0. 1 zlib/1. 2. 4 libidn/1. 23 librtmp/2. 3, the –resolve header works as expected with and a non-standard port specified in both places.
answered Oct 2 ’13 at 0:22
Michael – sqlbotMichael – sqlbot21. 1k1 gold badge55 silver badges79 bronze badges
If –resolve is not working out, you can specify the Host header (you might need to supress certificate warnings with -k):
curl -k -H ‘Host: ‘ ”
or with more verbose terms:
curl –insecure –header ‘Host: ‘ ”
answered Oct 1 ’13 at 23:09
Not the answer you’re looking for? Browse other questions tagged ssl port curl or ask your own question.
Frequently Asked Questions about curl specify port
What port does curl use?
Such connections implicitly start out using SSL/TLS and as such servers and clients use TCP port 465 to communicate with each other.
What is the default curl port?
Port 80 and 443 are just default port numbers.Dec 7, 2013
Does curl use port 443?
curl simply ignores the port and goes with 443.Oct 1, 2013