How to set up a PPTP client on a Cisco 851?

Question

Cisco

Dear gurus, help me set up the Cisco 851 as a PPTP client
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Cisco IOS Software, C850 Software (C850-ADVSECURITYK9-M), Version 12.4(15)T17, RELEASE SOFTWARE (fc2)
Technical Support: www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Tue 24-Jan-12 14:40 by prod_rel_team
ROM: System Bootstrap, Version 12.3(8r)YI4 , RELEASE SOFTWARE
MAX-CC uptime is 32 minutes
System returned to ROM by reload
System image file is "flash:c850-advsecurityk9-mz.124-15.T17.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with US and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with US and local laws, return this product immediately.
A summary of US laws governing Cisco cryptographic products may be found at:
www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected]
Cisco 851 (MPC8272) processor (revision 0x200) with 118784K/12288K bytes of memory.
Processor board ID FCZ112523H5
MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10
5 FastEthernet interfaces
128K bytes of non-volatile configuration memory.
20480K bytes of processor board System flash (Intel Strataflash)
Configuration register is 0x3921
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Answer 1

Please let me know where the blockage occurs. What does the provider say? Does he see connection requests?