The most common 3Com router login is blank / admin.
The Most Common 3Com Logins
- blank / admin: most 3Com routers (leave the username empty, or type admin if one is asked for).
- admin / 1234: some models.
Every Known 3Com Default Password
| 3com Model | Username | Password |
|---|---|---|
| 3c510 | blank | admin |
| 3c855 | blank | admin |
| 3C857 | blank | admin |
| 3CP4130 | admin | 1234 |
| 3cr856-95 | blank | admin |
| 3CR858-91 | blank | admin |
| 3CR858-91 | blank | admin |
| 3cr860-95 | blank | 1234 |
| 3CRWDR100A-72 | blank | admin |
| 3CRWDR101A-75 | blank | admin |
| 3CRWDR101A-75 | blank | admin |
| 3CRWDR101E-75 | blank | admin |
| 3CRWDR101E-75 | blank | admin |
| 3CRWDR300A-73 | blank | admin |
| 3crwe51196 | blank | admin |
| 3crwe52196 | blank | admin |
| 3crwe554G72 | blank | admin |
| 3CRWE554G72T | admin | admin |
| 3CRWE754G72 | blank | admin |
| 3CRWER100-75 | blank | admin |
| 3CRWER100-75 | blank | admin |
| 3CRWER200-75 | blank | admin |
| 3CRWER300-73 | blank | admin |
| WL522 | blank | admin |
| WL540 | blank | admin |
If the Default Password Doesn't Work
Someone has changed it. Check the label, then reset the router to get the default back. To set a new password, go to System Tools > Administrator Password. See choosing a strong password.