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internal/Internal-Services.md
| ... | ... | @@ -140,6 +140,15 @@ Repository Mirrors are listed on another page: [Repository Mirrors](/services/Re |
| 140 | 140 | | terraria.pebkac.dn42:7777 (IPv4 only/TCP) | [Terraria](https://terraria.org/) | Ask [TOMKAP-DN42](https://explorer.dn42.pebkac.gr/?#/person/TOMKAP-DN42) for password/whitelisting | |
| 141 | 141 | | The burble.dn42 shell servers include a number of classic text games, see [shell access](https://dn42.burble.com/services/shell/#classic-games) | Various | Log in to the shell servers for more | |
| 142 | 142 | |
| 143 | +## Challenges |
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| 144 | + |
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| 145 | +Test out your skills with online challenges |
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| 146 | + |
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| 147 | +| Start here | Remarks | |
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| 148 | +|:------------------------------------------------- |:---------------------------------- | |
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| 149 | +| https://burble.dn42/services/ping/ | burble.dn42 ping challenge | |
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| 150 | + |
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| 151 | + |
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| 143 | 152 | ## Shell |
| 144 | 153 | |
| 145 | 154 | Providers of shell access: |