- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Other services ports
Registered services that fit no other category. 4,970 ports, most common first.
| Port | Service | Transport | Risk | Encryption |
|---|---|---|---|---|
| 181 | Unify unify | TCP UDP | - | - |
| 182 | Unisys Audit SITP audit | TCP UDP | - | - |
| 183 | OCBinder ocbinder | TCP UDP | - | - |
| 184 | OCServer ocserver | TCP UDP | - | - |
| 185 | Remote-KIS remote-kis | TCP UDP | - | - |
| 186 | KIS Protocol kis | TCP UDP | - | - |
| 187 | Application Communication Interface aci | TCP UDP | - | - |
| 188 | Plus Five's MUMPS mumps | TCP UDP | - | - |
| 189 | Queued File Transport qft | TCP UDP | - | - |
| 190 | Gateway Access Control Protocol gacp | TCP UDP | - | - |
| 192 | OSU Network Monitoring System osu-nms | TCP UDP | - | - |
| 193 | Spider Remote Monitoring Protocol srmp | TCP UDP | - | - |
| 195 | DNSIX Network Level Module Audit dn6-nlm-aud | TCP UDP | - | - |
| 196 | DNSIX Session Mgt Module Audit Redir dn6-smm-red | TCP UDP | - | - |
| 199 | SMUX smux | TCP UDP | - | - |
| 200 | IBM System Resource Controller src | TCP UDP | - | - |
| 202 | AppleTalk Name Binding at-nbp | TCP UDP | - | - |
| 203 | AppleTalk Unused at-3 | TCP UDP | - | - |
| 205 | AppleTalk Unused at-5 | TCP UDP | - | - |
| 206 | AppleTalk Zone Information at-zis | TCP UDP | - | - |
| 207 | AppleTalk Unused at-7 | TCP UDP | - | - |
| 208 | AppleTalk Unused at-8 | TCP UDP | - | - |
| 210 | ANSI Z39.50 IANA assigned this well-formed service name as a replacement for "z39.50". z39-50, z39.50 | TCP UDP | - | - |
| 211 | Texas Instruments 914C/G Terminal IANA assigned this well-formed service name as a replacement for "914c/g". 914c-g, 914c/g | TCP UDP | - | - |
| 212 | ATEXSSTR anet | TCP UDP | - | - |
| 213 | IPX ipx | TCP UDP | - | - |
| 214 | VM PWSCS vmpwscs | TCP UDP | - | - |
| 215 | Insignia Solutions softpc | TCP UDP | - | - |
| 216 | Computer Associates Int'l License Server CAIlic | TCP UDP | - | - |
| 218 | Netix Message Posting Protocol mpp | TCP UDP | - | - |
| 219 | Unisys ARPs uarps | TCP UDP | - | - |
| 223 | Certificate Distribution Center cdc | TCP UDP | - | - |
| 224 | masqdialer masqdialer | TCP UDP | - | - |
| 242 | Direct direct | TCP UDP | - | - |
| 243 | Survey Measurement sur-meas | TCP UDP | - | - |
| 244 | inbusiness inbusiness | TCP UDP | - | - |
| 245 | LINK link | TCP UDP | - | - |
| 246 | Display Systems Protocol dsp3270 | TCP UDP | - | - |
| 248 | bhfhs bhfhs | TCP UDP | - | - |
| 256 | RAP rap | TCP UDP | - | - |
| 257 | Secure Electronic Transaction set | TCP UDP | - | - |
| 259 | Efficient Short Remote Operations esro-gen | TCP UDP | - | - |
| 260 | Openport openport | TCP UDP | - | - |
| 261 | IIOP Name Service over TLS/SSL nsiiops | TCP UDP | - | yes |
| 262 | Arcisdms arcisdms | TCP UDP | - | - |
| 263 | HDAP hdap | TCP UDP | - | - |
| 264 | BGMP bgmp | TCP UDP | - | - |
| 265 | X-Bone CTL x-bone-ctl | TCP UDP | - | - |
| 266 | SCSI on ST sst | TCP UDP | - | - |
| 267 | Tobit David Service Layer td-service | TCP UDP | - | - |
| 268 | Tobit David Replica td-replica | TCP UDP | - | - |
| 269 | MANET Protocols manet | TCP UDP | - | - |
| 270 | Q-mode encapsulation for GIST messages gist | UDP | - | - |
| 271 | IETF Network Endpoint Assessment (NEA) Posture Transport Protocol over TLS (PT-TLS) pt-tls | TCP | - | yes |
| 281 | Personal Link personal-link | TCP UDP | - | - |
| 282 | Cable Port A/X cableport-ax | TCP UDP | - | - |
| 283 | rescap rescap | TCP UDP | - | - |
| 284 | corerjd corerjd | TCP UDP | - | - |
| 286 | FXP Communication fxp | TCP UDP | - | - |
| 287 | K-BLOCK k-block | TCP UDP | - | - |
| 309 | EntrustTime entrusttime | TCP UDP | - | - |
| 310 | bhmds bhmds | TCP UDP | - | - |
| 311 | AppleShare IP WebAdmin asip-webadmin | TCP UDP | - | - |
| 312 | VSLMP vslmp | TCP UDP | - | - |
| 313 | Magenta Logic magenta-logic | TCP UDP | - | - |
| 314 | Opalis Robot opalis-robot | TCP UDP | - | - |
| 315 | DPSI dpsi | TCP UDP | - | - |
| 316 | decAuth decauth | TCP UDP | - | - |
| 317 | Zannet zannet | TCP UDP | - | - |
| 318 | PKIX TimeStamp pkix-timestamp | TCP UDP | - | - |
| 319 | PTP Event ptp-event | TCP UDP | - | - |
| 320 | PTP General ptp-general | TCP UDP | - | - |
| 321 | PIP pip | TCP UDP | - | - |
| 322 | RTSPS rtsps | TCP UDP | - | - |
| 333 | Texar Security Port texar | TCP UDP | - | - |
| 344 | Prospero Data Access Protocol pdap | TCP UDP | - | - |
| 345 | Perf Analysis Workbench pawserv | TCP UDP | - | - |
| 346 | Zebra server zserv | TCP UDP | - | - |
| 347 | Fatmen Server fatserv | TCP UDP | - | - |
| 348 | Cabletron Management Protocol csi-sgwp | TCP UDP | - | - |
| 349 | mftp mftp | TCP UDP | - | - |
| 350 | MATIP Type A matip-type-a | TCP UDP | - | - |
| 351 | bhoetty bhoetty, matip-type-b | TCP UDP | - | - |
| 352 | bhoedap4 bhoedap4, dtag-ste-sb | TCP UDP | - | - |
| 353 | NDSAUTH ndsauth | TCP UDP | - | - |
| 354 | bh611 bh611 | TCP UDP | - | - |
| 355 | DATEX-ASN datex-asn | TCP UDP | - | - |
| 356 | Cloanto Net 1 cloanto-net-1 | TCP UDP | - | - |
| 357 | bhevent bhevent | TCP UDP | - | - |
| 358 | Shrinkwrap shrinkwrap | TCP UDP | - | - |
| 360 | scoi2odialog scoi2odialog | TCP UDP | - | - |
| 361 | Semantix semantix | TCP UDP | - | - |
| 362 | SRS Send srssend | TCP UDP | - | - |
| 364 | Aurora CMGR aurora-cmgr | TCP UDP | - | - |
| 365 | DTK dtk | TCP UDP | - | - |
| 366 | ODMR odmr | TCP UDP | - | - |
| 367 | MortgageWare mortgageware | TCP UDP | - | - |
| 368 | QbikGDP qbikgdp | TCP UDP | - | - |
| 369 | rpc2portmap rpc2portmap | TCP UDP | - | - |
| 370 | codaauth2 codaauth2 | TCP UDP | - | - |
Securing other services services
Other port categories
Web /tools/ports/category/web Remote access /tools/ports/category/remote-access File transfer & sharing /tools/ports/category/file-transfer Email /tools/ports/category/email Databases & caches /tools/ports/category/databases Directory & authentication /tools/ports/category/directory-auth Network services /tools/ports/category/network-services VPN, tunnels & proxies /tools/ports/category/vpn-tunnels Messaging & queues /tools/ports/category/messaging Voice & chat /tools/ports/category/voice-chat Media & streaming /tools/ports/category/media IoT & industrial (ICS) /tools/ports/category/iot-ics DevOps, cloud & containers /tools/ports/category/devops Monitoring & logging /tools/ports/category/monitoring Gaming /tools/ports/category/gaming