The following is a list of content type which can be blocked by the DrayTek firewall/routers. The list does constantly evolve as new protocols are introduced and also by model:

Block Data TypeFile Type/Extension or Protocol
Active Web ContentCookies, ActiveX, Java, Javascript
File Type Image : .bmp .dib .gif .jpeg .jpg .jpg2 .jp2 .pct .pcx .pic .pict .png .tif .tiff
Video : .asf .avi .mov .mpe .mpeg .mpg .mp4 .qt .rm .wmv .3gp .3gpp .3gpp2 .3g2
Audio : .aac .aiff .au .mp3 .m4a .m4p .ogg .ra .ram .vox .wav .wma
Java : .class .jad .jar .jav .java .jcm .js .jse .jsp .jtk
ActiveX : .alx .apb .axs .ocx .olb .ole .tlb .viv .vrm
Compressed Files : .ace .arj .bzip2 .bz2 .cab .gz .gzip .rar .sit .zip .arc
Executeable : .bas .bat .com .exe .inf .pif .reg .scr
Instant Messaging (IM)MSN, YahooIM, AIM, ICQ, GoogleChat, QQ, iChat, Jabber, GoogleTalk, XFire, GaduGadu, Paltalk, Qnext, Meetro, POCO/PP365, AresChat, AliWW, KC, Lava-Lava,ICU2, iSpQ, UC
Web-Based IMeMessenger, WebMSN, meebo, eBuddy, ILoveIM, ICQ Java, ICQ Flash, goowy, IMhaha, getMessenger, IMUnitive, Wablet, mabber, MSN2GO, KoolIM, MessengerFX, MessengerAdictos, WebYahooIM
VoIPSkype, Kubao. Gizmo, SIP
Peer-to-Peer (P2P)BitTorrent, Gnuttella, Soulseek, edonkey, FastTrack, OpenFT, OpenNAP, Winny (These protocols are used by several other P2P clients too)
Standard Web ProtocolsFTP, DNS, HTTP, IMAP, IRC, NNTP, POP3, SMP, SMTP, SNMP, SSH, SSL/TLS, Telnet
TunnellingSocks4/5, PGPNet,HTTP Proxy, Tor, VNN, SoftEther, MS TEREDO, Wujie/UltraSurf, Hamachi, HTTP Tunnel, Ping Tunnel, TinyVPN, RealTunnel, DynaPass
StreamingMMS, RTSP, TVAnts, PPStream, PPlive, FeiDian, UUSee, NSPlayer, PCAST, TVKoo, SopCast, UDLiveX, TVUPlayer, MySee, Joost, FlashVideo, SilverLight, Slingbox, QVOD
Remote ControlVNC, Radmin, SpyAnywhere, ShowMyPC, LogMeIn, TeamViewer Gogrok RemoteControlPro CrossLoop WindowsRDP pcAnywhere Timbuktu WindowsLiveSync SharedView
Web HD (Online Backup)HTTP Upload, HiNet, SafeBox MS, SkyDrive, GDoc, Uploader, ADrive, MyOtherDrive, Mozy, BoxNet, OfficeLive
Custom Protocol TypeBased on your own IP protocol/port settings