I have been troubleshooting a VPN connection between an ASA and 1841. I have had trouble connecting, I get ping and tracert to/from. I can see the 1841 send to the ASA, I see the ASA send to the 1841 but I don't see the 1841 receive the ASA, hence the breakdown.
I am wondering could IOS version play a role? If so, I am currently running the following on an 1841:
Image Name c1841-advsecurityk9-mz.124-10a.bin
IOS Version 12.4(10a)
Should I and if so, what should I upgrade to?
Thanks for your help,