Connectivity Issues with RustDesk (P2P) after SG2428P Firmware Update (Controller 5.30.13)
Connectivity Issues with RustDesk (P2P) after SG2428P Firmware Update (Controller 5.30.13)
Tags:
#Configuration
#Network Connectivity
#Firmware Update
#RustDesk
Hello community,
I am experiencing a persistent connectivity issue with RustDesk since updating my
SG2428P switch on Jan 24th, 2026 (version
5.30.13).
My Setup:
- Gateway: ER605
- Switch: SG2428P (Updated to latest firmware on Jan 24th)
- ISP: Connection with CGNAT (WAN IP in the 100.74.x.x range).
- Server: Using public RustDesk network (no self-hosted server).
- VLANs: Multiple VLANs (10, 20, 30, 40, 100, 200).
The Problem:
Since the update, all devices within the Omada network show the status "Connecting to the RustDesk network" and cannot establish a connection.
Since the update, all devices within the Omada network show the status "Connecting to the RustDesk network" and cannot establish a connection.
- Comparison with other tools: Interestingly, TeamViewer and AnyDesk are working perfectly without any issues. Only RustDesk is unable to connect.
- Hotspot Test: If I take my MacBook out of the Omada network and connect it to a mobile phone hotspot, RustDesk works instantly. For example, I can then immediately access my mother's PC (which is located at a different house/network).
- The Issue: As soon as I reconnect to the Omada LAN/WLAN, RustDesk fails again. It seems the Omada stack is specifically interfering with RustDesk's handshake or its rendezvous/relay server communication since the update.
What I have tried so far:
- Verified VLAN Isolation is OFF.
- Enabled UPnP for all VLANs.
- Disabled Flood Defense (no change).
- Checked for Gateway ACLs (none exist).
- Toggled ARP-to-Unicast and ARP Detection (currently OFF).
Technical Observations (from ifconfig):
The internal interface
The internal interface
eth0 shows a high number of dropped packets since the update:
eth0: Over 10,000 dropped packets and 214 RX errors.- Given that TeamViewer works, it seems the new firmware might have an issue with specific UDP-based NAT traversal (STUN) that RustDesk relies on.
Log Snippet (Jan 26, 2026):
eth0 Link encap:Ethernet HWaddr 92:13:3C:65:0D:2E
RX packets:15342873 errors:214 dropped:10902 overruns:0 frame:0
Has anyone else seen specific blocking of RustDesk while other remote tools continue to work after the latest SG2428P firmware update?
Thank you!
