After installing BleemSync 1.1 on my PlayStation Classic, I could connect to the BleemSync UI from Windows but not from Linux (Ubuntu 19.04). Google Chrome reported "unable to connect," and ping to 169.254.215.100 reported a network error.
dmesg showed that Linux identified the device, and RNDIS networking started
[23945.137399] usb 1-3: new high-speed USB device number 31 using xhci_hcd [23945.286069] usb 1-3: New USB device found, idVendor=04e8, idProduct=6863, bcdDevice=ff.ff [23945.286075] usb 1-3: New USB device strings: Mfr=3, Product=4, SerialNumber=5 [23945.286079] usb 1-3: Product: classic [23945.286082] usb 1-3: Manufacturer: BleemSync [23945.290633] rndis_host 1-3:1.0 usb0: register 'rndis_host' at usb-0000:00:14.0-3, RNDIS device, 8a:04:6f:1c:f9:72 [23945.291271] cdc_acm 1-3:1.2: ttyACM0: USB ACM device [23945.339113] rndis_host 1-3:1.0 enp0s20f0u3: renamed from usb0
However, ifconfig showed it did not have an IPv4 address. This indicates a DHCP failure.
$ ifconfig enp0s20f0u3 enp0s20f0u3: flags=4163mtu 1500 inet6 fe80::adf4:a447:4b1d:f96c prefixlen 64 scopeid 0x20 ether 72:b7:b8:ae:c8:00 txqueuelen 1000 (Ethernet) RX packets 8 bytes 536 (536.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 81 bytes 12347 (12.3 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
I bypassed DHCP by manual IP configuration.
sudo route add -net 169.254.215.0 netmask 255.255.255.0 metric 1024 dev enp0s20f0u3 sudo ifconfig enp0s20f0u3 169.254.215.2 ping 169.254.215.100
Now Google Chrome, ping, and even telnet worked.
Note: your interface name may vary. Mine was enp0s20f0u3.
This solution worked until rebooting Ubuntu. Later I found a permanent solution: BleemSync 1.0 on Ubuntu thanks to DDFoster96.