The stock /etc/cipe/options reads as follows: --- # The static key. Keep this file secret! # The key is 128 bits in hexadecimal notation. #key 3248fd20adf9c00ccf9ecc2393bbb3e4 # You shouldn't have to modify anything past this point. # The peer's IP address. #ptpaddr 6.5.4.3 # Our CIPE device's IP address. #ipaddr 6.7.8.9 #maxerr -1 [ ... ] --- This is highly misleading. If you don't define ptpaddr and ipaddr, ciped process won't even start properly. 'me' and 'peer', on the other hand, can be ignored (due to way ciped is started). Please move the comment line down like 5-10 lines, depending on how crucial you feel maxerr definition is. For server-server VPN links setting it to -1 would be helpful (ciped won't quit even after a lot of invalid packets etc.) Perhaps it would be good to change the defaults of ptpaddr and ipaddr to some reserved IP address space, like 10.0.0.1 and 10.0.0.2? Or, something rarer like 172.16.100.1 and 172.16.100.2.
cipe-1.3.0-10 will include the ability to set IPADDR and PTPADDR values in the sysconfig file, and the init script will pick them up (or not) depending on whether or not they are defined.