After reading this again I'm thinking you might be confused by IP ID vs sequence numbers?
IP header and TCP header are different things. see here for IP header : http://en.wikipedia.org/wiki/IPv4 or this might be of help: http://networkstatic.net/what-are-ethernet-ip-and-tcp-headers-in-wireshark-captures/ On Sat, Sep 14, 2013 at 1:12 PM, Espen Johansen <[email protected]> wrote: > Try tcpdump + wireshark. Then read this: > http://packetlife.net/blog/2010/jun/7/understanding-tcp-sequence-acknowledgment-numbers/ > > pfSense should not change sequence numbers unless you tell it to do so. > > for packet breakdown read : http://www.daemon.org/tcp.html > > Google is your friend ;-) > > > On Fri, Sep 13, 2013 at 4:15 PM, Martin Fuchs <[email protected]>wrote: > >> Hi !**** >> >> ** ** >> >> We use pfSense 2.0.1 and have a local LAN, a WAN and remote Offices >> connected by managed VPN-connections (pfsense does not need to stablish >> VPN tot he remote offices).**** >> >> ** ** >> >> LAN -> pfSense -> remote office**** >> >> ** ** >> >> In the LAN we have a HiPath Communications system and in the remote >> offices one remote system each.**** >> >> pfSense only routes between these locations. There is no filtering (in >> the floating rules everthing is allowed between LAN and remote offices.** >> ** >> >> ** ** >> >> Firewall-scrub, clear DF and random id generation are disabled.**** >> >> ** ** >> >> Does pfSense in this configuration change the TCP sequence numbers oft he >> conections between the communication systems ?**** >> >> And is there any simple way how i can check this ?**** >> >> ** ** >> >> Regards,**** >> >> ** ** >> >> martin**** >> >> ** ** >> >> ** ** >> >> _______________________________________________ >> List mailing list >> [email protected] >> http://lists.pfsense.org/mailman/listinfo/list >> >> >
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