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> > hey, an integrated webserver in a cable modem sounds pretty neat! > > ...but i'm entirely puzzled about how it would work. it's obious enough > in the case of cable/dsl router/firewall products where rfc1918 address > space is in use, but how would this thing possibly intercept web traffic > destined to the default router's mac address and rfc1918 ip addresses? > > could it be analyzing every packet at wirespeed? amazing for a consumer > grade product. > > anyone? I'm not sure of the technical details, but I do know that it works. Below is a sample from my cable modem's logfile, starting at the bottom with 'BOOTING' (which is when I switch the modem on) to 'Bridge Forwarding Enabled' (which is when everything has finished). Time Priority Code Message 020209063855 7-Information F502.1 Bridge Forwarding Enabled. 020209063855 7-Information F502.3 Bridge Learning Enabled. 020209063855 7-Information B518.0 Baseline Privacy is skipped 020209063855 7-Information I500.0 Registration Completed 020209063855 7-Information I0.0 REG-RSP Registration Response 020209063855 7-Information I0.0 REG-REQ Registration Request 020209063855 7-Information D509.0 Retrieved TFTP Config /DOCSIS/1500x300st-1 SUCCESS 020209063855 7-Information D507.0 Retrieved Time....... SUCCESS ************ 7-Information D511.0 Retrieved DHCP .......... SUCCESS ************ 5-Warning D520.2 DHCP Attempt# 1 BkOff: 4s Tot DSC:1 OFF:1 REQ:1 ACK:1 ************ 7-Information D0.0 DHCP CM Net Configuration download and Time of Day ************ 7-Information T500.0 Acquired Upstream .......... SUCCESS ************ 8-Debug T503.1 Acquire US with status OK, powerLevel 43, tempSid 3733 ************ 8-Debug T505.0 Acquired Upstream with status OK ************ 7-Information T501.0 Acquired Downstream (693000000 Hz)........ SUCCESS ************ 8-Debug T509.0 Acquired DS with status OK, DS Freq 693000000, US Id 3 ************ 7-Information I510.0 *** BOOTING *** SB4100-4.0.9-SCM07-NOSHELL Interesting to note the "Retrieved TFTP Config /DOCSIS/1500x300st-1 SUCCESS" - this is the modem's config file which is downloaded from ATT every time the modem boots. As you can see from the file name, it's set up for 1500x300 download/upload speeds, which is typically what I get. Also, here is the information on my cable modem's signal: Downstream Value Frequency 693000000 Hz Locked Signal to Noise Ratio 31 dB QAM 64 Network Access Control Object ON Power Level -15 dBmV Upstream Value Channel ID 3 Frequency 38000055 Hz Ranged Ranging Service ID 3733 Symbol Rate 1.280 Msym/s Power Level 43 dBmV
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