Why doesn't a socket open on a non-standard ssh port, although the port is working?

Question

PHP

Hello.
When trying to open from php ssh on a non-standard port,

$fp = fsockopen("10.20.30.40", 1234, $errno, $errstr, 30);

the error Error 110 falls out all the time. Connection timed out.
If the port is standard - everything works, if not, a timeout occurs. At the same time, putty, winscp and other programs connect without problems.
What can be wrong?

UPD:
In the logs, on the machine to which I am trying to connect, I see the following picture:

Sep 21 19:35:25 sshd[21458]: reverse mapping checking getaddrinfo for ip.178-70-22-20.avangarddsl.ru [11.22.33.44] failed - POSSIBLE BREAK-IN ATTEMPT!
Sep 21 19:35:25 sshd[21458]: Accepted password for root from 11.22.33.44 port 14474 ssh2
Sep 21 19:35:25 sshd[21458]: pam_unix(sshd:session): session opened for user root by (uid=0)
Sep 21 19:35:25 sshd[21458]: subsystem request for sftp by user root
Sep 21 19:35:49 sshd[21336]: Received signal 15; terminating.
Sep 21 19:35:49 sshd[21476]: Server listening on 0.0.0.0 port 1234.
Sep 21 19:35:49 sshd[21476]: Server listening on :: port 1234.

11.22.33.44 is the machine I'm trying to connect to, 1234 is the current ssh port