Hello,
Since machien-ip, gateway and SRX IP-Address are all in same subnet, you need to have them assigned to same vlan.
Verify below and update the results:
1. switch-port to which machine is connected to is in valn.20
2. Interface of L3-Switch that is connected to SRX is in vlan.20
3. Modify configuration of SRX to have vlan-id 20 for vlan1
- set vlans vlan1 vlan-id 20
Regards,
Raveen