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From: Jan J. K. <ja...@ni...> - 2009-07-20 10:26:06
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Seref Arikan wrote: > Hi, > When I use openVPN with an ubuntu client and a windows server, udp > packages from client to server are reported with info "udp checksum > incorrect" in wireshark. > Packages from server to client have no problem. The vpn is functioning > as it should, but should I be worrying about this? I don't assume it > comprimises security, but your response would be much appreciated. > > where is wireshark running? on the ubuntu client? then most likely you've got TCP/UDP offloading enabled; this means that the TCP/UDP checksums are calculated by the network adapter instead of by the OS. This is nice for performance but it does result in wireshark reporting 'checksum incorrect' messages . It's quite harmless though. HTH, JJK |