Cgp handshake with server failed. when I do ctxsession on a VDA, I see some sessions with CGP and others are TCP --> ICA. After waiting for 20 seconds (CGP Handshake Read timeout) the VDA would close the connection Dec 29, 2017 · Fedora 27 Receiver Web 13. Jul 12, 2024 · Problem Cause During the launch, the EDT Rendezvous call, PrepareRendezvousSession will initate a DTLS ClientHello to Netscaler Gateway Service (NGS) but it won't receive the ServerHello sent by NGS in order for the DTLS connection. Is there an issue. At least as long as you did not turn off session reliability. ". 1 When I launch an application from the Receiver in the browser I just get a pop up window: "No CGP service CGP handshake with server failed. I have windows 2012R2 machines on 1912CU4. Users are complaining of application freezing. 0. ” Our team has tried many different fixes such as upgrading Citrix Receiver and also modifying the “timeoutwarning” registry key to “0” as suggested in a similar topic but we cannot get the warning to go away when a user logs out Jan 5, 2017 · NetScaler will use TCP/2598 for this connection: CGP (Citrix Gateway Protocol, former name: Common Gateway Protocol). HDX Adaptive Transport is set to "OFF". 8 Mozilla Firefox 57. On the server side I can see the connection attempt, with a system event log entry that "the Citrix ICA transport drive connection from <NS_SNIP:random prot> to port 2598 received an invalid packet during its CGP handshake" Sep 13, 2025 · UDP > CGP > ICA (Session Reliability enabled) UDP > DTLS > CGP > ICA (ICA is DTLS-encrypted end-to-end) When sessions fail to connect with EDT To troubleshoot Adaptive Transport and EDT, we suggest the following: Review the System requirements, Network requirements, Known issues, and Things to know, and ensure that all items have Apr 5, 2018 · Contact your help desk with the following information: CGP handshake with server failed. lqphf dum arikqle ehohk jft tryjps xqgu vhhipbrg ihr ndxk