P

  ppp direction {callin  callout  dedicated}  

Platform: IOS 12.1
Where: Configuration interface
Info: Identifies the direction of PPP activity. PPP attempts to determine if a call is a call-in or a call-out or a dedicated line. This is how it detects spoofed CHAP challenges. When an async interface is added to a dialer interface, PPP cannot detect the difference between a dedicated line and a call-in. So it assumes that it is a call-in. Adding the PPP direction dedicated overcomes this.

  ppp ipcp accept-address  

Platform: IOS based
Where: Configuration interface
Info: Specifies that IOS is to revert to the previous operation regarding the acceptance of IP addresses from users. When enabled, the peer IP address will be accepted but is still subject to AAA verification; it will have precedence over any local address pool, however. In IOS releases after 11.0(11), PPP IPCP negotiation was changed to accept a remote peer's "Her" proposed address regardless, and the "Her" address is subsequently added to the IP routing table as a host route. With IOS releases later than 11.0(11), the software checks the "Her" address against the corresponding dialer map, and if the address is different from the IP address detailed within the dialer map, a NAK will be sent and the dialer map IP address will be added as a host route in the IP routing table.

  ppp lcp fast-start  

Platform: IOS 12.1
Where: Configuration interface
Info: Specifies to ignore the carrier timer and start PPP when an LCP packet arrives.

  ppp restart-timer msec  

Platform: IOS based
Where: Configuration interface
Info: Modifies the default value (2 seconds) for the restart timer. The translate command also has a similar keyword, restart .

  ppp timeout absolute <sec>  

Platform: IOS based
Where: Configuration interface
Info: Determines how long PPP link can be up (default is infinity, configurable as 0). Used under virtual-template interfaces.

  ppp timeout idle <sec> inbound & ppp timeout idle <sec> either  

Platform: IOS based
Where: Configuration interface
Info: Determines how long PPP can wait until bringing the link down if there is no traffic (default is infinity, configurable as 0). Used under virtual-template interfaces.

  profile <start> <stop> <granularity>  

Platform: IOS based
Where: General
Info: You can set up CPU profiling in the exec mode with the profile command. Process profiling allows you to find which segment of code is perhaps hogging the CPU. To get use out of this feature, you need a symbol table so you can pull the location of the appropriate segment of code. The segment is defined by the start and stop values given to the profile command. The granularity specifier allows you to get down to single instruction level. The CPU has its own internal timer that is incremented regardless of whether the desired segment of code is executed. When the desired segment of code is executed, a per-profile counter is incremented.

Comparison of this counter with the overall system timer allows you to get a handle on how much of the CPU the specific segment is using.



Hacking Exposed Cisco Networks
Hacking Exposed Cisco Networks: Cisco Security Secrets & Solutions
ISBN: 0072259175
EAN: 2147483647
Year: 2005
Pages: 117

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