| 53 | Consul | tcp/udp | DNS | DNS service discovery | 
| 443 | seal-ipp-checkin | tcp | HTTPS | Job acceptance via IPPS | 
| 515 | seal-checkin | tcp | LPR | Job acceptance via LPR | 
| 631 | seal-ipp-checkin | tcp | HTTP | Job acceptance via IPP | 
| 1898 | seal-error-sheet | tcp | HTTPS |  | 
| 1908 | seal-convert-ps2pdf | tcp | HTTPS |  | 
| 1918 | seal-convert-pdfstamp | tcp | HTTPS |  | 
| 1928 | seal-convert-pdf2ps | tcp | HTTPS |  | 
| 1938 | seal-convert-sapgof | tcp | HTTPS |  | 
| 1958 | seal-convert-dispatcher | tcp | HTTPS |  | 
| 1968 | seal-dispatcher | tcp | HTTPS | HTTP streaming  up to PLOSSYS 5.3.0 | 
| 1969 | seal-controller | tcp | HTTPS | HTTP streaming; as of PLOSSYS 5.3.0 | 
| 1978 | seal-ghost | tcp | HTTPS | HTTP streaming | 
| 1988 | seal-bodyscanner | tcp | HTTPS | HTTP streaming | 
| 1998 | seal-checkout | tcp | HTTPS | HTTP streaming | 
| 2008 | seal-printer-monitor | tcp | HTTPS | HTTP streaming | 
| 2028 | seal-copier | tcp | HTTPS | HTTP streaming | 
| 2038 | seal-convert-sapwin | tcp | HTTPS | HTTP streaming | 
| 5601 | Kibana | tcp | HTTP | GUI for visualising the log data | 
| 8080 | seal-rest | tcp | HTTPS | REST API | 
| 8081 | seal-job-notifier | tcp | HTTP | PLOSSYS Infoclient API | 
| 8082 | seal-job-notifier | tcp | HTTPS | PLOSSYS Infoclient API | 
| 8300 | Consul | tcp | RPC | Server RPC | 
| 8301 | Consul | tcp/udp | Serf LAN | Serf LAN | 
| 8302 | Consul | tcp/udp | Serf WAN | Serf WAN | 
| 8400 | Consul | tcp | RPC | Client RPC | 
| 8500 | Consul | tcp | HTTPS | Consul Administrator GUI | 
| 9000 | PLOSSYS Administrator | tcp | HTTPS | PLOSSYS 5 GUI | 
| 9200 | Elasticsearch | tcp | HTTP(S) | Log database REST API | 
| 9300 | Elasticsearch | tcp | Binary | Communication in cluster mode | 
| 27017 | MongoDB | tcp | MongoDB-specific binary | Database | 
| 32769 | seal-keycloak | tcp | HTTPS | OIDC identity provider (optional) |