hello ... I build internet connection with 876 and adsl line. everything looks fine until I try to make MS VPN connection. connection could not be established. FTP , HTTP to internet works fine. Then I created on cisco site-to-site IPSEC connection to MS ISA server. Ping went throught VPN fine , but no other communication Can't be established over VPN - RDP, ftp doesn't starts, ssh works only for few seconds. On RPD connect I get only connecting window and then connection was timeouted.
After changing cisco device to some basich dsl router everithing forks fine. I found some mtu issue ,but in my config are set all cisco recomendation for MTU setting.
So where can be problem ? Thank you.