Port 1309Quartus jtagd
**Quartus JTAGD** port (1309) is primarily used by *Altera* (now part of Intel) for remote programming, debugging, and hardware communication with FPGA devices via JTAG servers. This port facilitates interactions between Quartus software tools and programmable logic devices, enabling hardware development and maintenance workflows..
- transport
- tcp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 8,057
single transport
payload readable on path
used by convention
caution
rank 630 of 993 · top 63%
Technical Details
what runs on :1309Port 1309 is associated with Altera Quartus JTAGD, a service used to provide remote access to FPGA devices utilizing the JTAG (Joint Test Action Group) interface. The JTAGD daemon listens on this port to facilitate programming, debugging, boundary scan operations, and hardware verification over a network connection from a Quartus design environment.
Altera's Quartus software suite relies on this service for communication with its development hardware, allowing engineers to download bitstreams, run diagnostics, and perform real-time control tasks. Since JTAG is a standardized protocol for test access, this port enables seamless integration across supported hardware within design and testing workflows.
Typically, the JTAGD service is run on engineering workstations or dedicated servers connected to the target FPGA via hardware interfaces (such as USB-Blaster). The use of port 1309 simplifies multi-user access and supports distributed development environments where hardware resources must be shared securely and efficiently.
Security Information
exposure of :1309risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
system averages 3.9 across 342 ports — this one sits 0.1 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common vulnerabilities related to port 1309 involve unauthorized remote access, as exposing JTAGD externally can permit attackers to:
- Reprogram FPGA devices with malicious firmware
- Extract intellectual property from bitstreams
- Disrupt hardware functionality
- Conduct debugging attacks compromising device security
Mitigations include:
- Restricting network exposure of port 1309 using internal networks or VPNs
- Implementing strict firewall rules to limit access
- Using secure tunneling (e.g., SSH port forwarding)
- Enforcing strong authentication on hosts running JTAGD
- Auditing access logs to detect unauthorized attempts
- Where possible, isolate FPGA programming interfaces from untrusted networks
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risk mix of the 8 listed
- caution100%
0 of 8 encrypted