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TCP 8787

ProtocolTCP
Port8787
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Synopsis

  • RStudio Server (now Posit Workbench) uses TCP 8787 as its default web interface port; this includes official packages and popular Docker images like rocker/rstudio and posit/rstudio.
  • JBoss/WildFly application servers commonly use 8787 for Java remote debugging via JDWP when debug mode is enabled (e.g., JBoss EAP 7/WildFly standalone.conf sets DEBUG_PORT=8787).
  • Software built on WildFly, such as older/legacy Keycloak distributions, also exposes JDWP on 8787 when started in debug mode.
  • Security note: Exposed JDWP on 8787 is frequently abused—attackers can attach a debugger and achieve remote code execution if authentication or network controls are absent.

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