NFS mount Ubuntu 22.04 - Connection timed out

I have two systems running on Ubuntu 22.04. I want to mount one of the disks of the server (PC1 - auerbach) on the client (PC2 - hubel) using NFS.

The /etc/exports file on PC1 looks like the following:

/media/auerbach-data    139.124.148.0/25(rw,no_subtree_check,sync,fsid=001)

I ran sudo exportfs -av on PC1 which works.The /etc/fstab file on PC2 looks like the following:

auerbach:/media/auerbach-data      /mnt/auerbach-data    nfs     defaults,auto,rw        0       0

However, when I run sudo mount /mnt/auerbach-data -v on PC2, I get the error message:

mount.nfs: timeout set for Thu Nov 28 10:44:02 2024mount.nfs: trying text-based options 'vers=4.2,addr=139.124.148.27,clientaddr=139.124.148.5'mount.nfs: mount(2): Connection timed outmount.nfs: Connection timed out

What is really weird is that when I run showmount -e on PC1, I get:

Export list for PC1:/media/auerbach-data 139.124.148.0/25

So it seems like the exportation itself works.And when I then run showmount, I get:

Hosts on PC1:PC2’s ip

Which seems to indicate PC1 sees PC2. Furthermore, when I run showmount -e auerbach on PC2, I get:

Export list for auerbach: /media/auerbach-data 139.124.148.0/25

After a bit of research to fix the issue, I used tcpdump -i eno145 host auerbach and figured that when running the mount command on PC2, PC1 didn't receive any information over the network. This isn't the case when I ping PC1 or use showmount. Some of the logs are listed below:

tcpdump: verbose output suppressed, use -v[v]... for full protocol decodelistening on eno145, link-type EN10MB (Ethernet), snapshot length 262144 bytes10:52:29.203855 IP hubel.836 > auerbach.nfs: Flags [S], seq 3035191773, win 64240, options [mss 1460,sackOK,TS val 3448551700 ecr 0,nop,wscale 7], length 010:52:30.244579 IP hubel.836 > auerbach.nfs: Flags [S], seq 3035191773, win 64240, options [mss 1460,sackOK,TS val 3448552741 ecr 0,nop,wscale 7], length 0

Does anybody know how I could solve this issue? Thank you in advance!

Additional Information:There is no Firewall on auerbach and port 2049 is open (checked with telnet).

When I use sudo mount -t nfs auerbach:/media/auerbach-data /mnt/auerbach-data -v, I get:

mount.nfs: timeout set for Thu Nov 28 16:53:57 2024mount.nfs: trying text-based options 'vers=4.2,addr=139.124.148.27,clientaddr=139.124.148.79'