Hi Mikhael, Moving this on to Misc List as it is more approiaate for support type requests,
It may not be OpenbSD, that is ignoring the fragments, depending on your setup an intermediate device ( NAT router etc) could be proccessing the IP fragments incorrectly and or dropping them... IP fragments are a pain as they dont really match the protocol of the original packet and have all sorts of issues when traversing multipath (hashed) multipath routes between the source and destination.. cloudflare have a really good article on this https://blog.cloudflare.com/ip-fragmentation-is-broken/ Hope this is of help... On Sun, 5 Mar 2023 at 22:04, Mikhael Lialin <soult...@gmail.com> wrote: > Hi. > > I'm successfully configured eap tls with freeradius. > > However with default value for fragment_size in wpa_supplicant.conf > which equals 1398 - packets get fragmented and seems ignored by the server. > > Both systems are openbsd 7.2 > > here is output from thsark: > > --target radius-- > 9 124.886123 10.10.2.10 ? 10.10.2.1 RADIUS 188 Access-Request id=0 > 10 124.894967 10.10.2.1 ? 10.10.2.10 RADIUS 106 Access-Challenge id=0 > 11 124.914163 10.10.2.10 ? 10.10.2.1 RADIUS 373 Access-Request id=1 > 12 125.010446 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=1 > 13 125.014979 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=2 > 14 125.032537 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=2 > 15 125.034214 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=3 > 16 125.045650 10.10.2.1 ? 10.10.2.10 RADIUS 300 Access-Challenge id=3 > > > --source eapol_test with wpa_supplicant.conf--- > > 1 0.000000 10.10.2.10 ? 10.10.2.1 RADIUS 188 Access-Request id=0 > 2 0.011025 10.10.2.1 ? 10.10.2.10 RADIUS 106 Access-Challenge id=0 > 3 0.027023 10.10.2.10 ? 10.10.2.1 RADIUS 373 Access-Request id=1 > 4 0.126651 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=1 > 5 0.127440 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=2 > 6 0.148742 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=2 > 7 0.149411 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=3 > 8 0.161846 10.10.2.1 ? 10.10.2.10 RADIUS 300 Access-Challenge id=3 > 9 0.179447 10.10.2.10 ? 10.10.2.1 IPv4 1514 Fragmented IP > protocol (proto=UDP 17, off=0, ID=b444) > 10 3.193244 10.10.2.10 ? 10.10.2.1 IPv4 1514 Fragmented IP > protocol (proto=UDP 17, off=0, ID=b576) > 11 9.213196 10.10.2.10 ? 10.10.2.1 IPv4 1514 Fragmented IP > protocol (proto=UDP 17, off=0, ID=ef21) > 12 21.233280 10.10.2.10 ? 10.10.2.1 IPv4 1514 Fragmented IP > protocol (proto=UDP 17, off=0, ID=00d0) > > eapol_test fails > > setting fragment_size = 1212 in wpa_supplicant.conf and getting success. > > output from tshark: > > --target radius-- > 1 0.000000 10.10.2.10 ? 10.10.2.1 RADIUS 188 Access-Request id=0 > 2 0.006613 10.10.2.1 ? 10.10.2.10 RADIUS 106 Access-Challenge id=0 > 3 0.024538 10.10.2.10 ? 10.10.2.1 RADIUS 373 Access-Request id=1 > 4 0.104617 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=1 > 5 0.106355 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=2 > 6 0.114877 10.10.2.1 ? 10.10.2.10 RADIUS 1320 Access-Challenge id=2 > 7 0.118679 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=3 > 8 0.128309 10.10.2.1 ? 10.10.2.10 RADIUS 300 Access-Challenge id=3 > 9 0.145442 10.10.2.10 ? 10.10.2.1 RADIUS 1415 Access-Request id=4 > 10 0.160230 10.10.2.1 ? 10.10.2.10 RADIUS 106 Access-Challenge id=4 > 11 0.161621 10.10.2.10 ? 10.10.2.1 RADIUS 1372 Access-Request id=5 > 12 0.262102 10.10.2.1 ? 10.10.2.10 RADIUS 161 Access-Challenge id=5 > 13 0.263753 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request id=6 > 14 0.281330 10.10.2.1 ? 10.10.2.10 RADIUS 226 Access-Accept id=6 > > --source eapol_test with wpa_supplicant.conf--- > > 1 0.000000 10.10.2.10 ? 10.10.2.1 RADIUS 188 Access-Request > id=0 > 2 0.010060 10.10.2.1 ? 10.10.2.10 RADIUS 106 > Access-Challenge id=0 > 3 0.023662 10.10.2.10 ? 10.10.2.1 RADIUS 373 Access-Request > id=1 > 4 0.108072 10.10.2.1 ? 10.10.2.10 RADIUS 1320 > Access-Challenge id=1 > 5 0.108734 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request > id=2 > 6 0.118632 10.10.2.1 ? 10.10.2.10 RADIUS 1320 > Access-Challenge id=2 > 7 0.119341 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request > id=3 > 8 0.132026 10.10.2.1 ? 10.10.2.10 RADIUS 300 > Access-Challenge id=3 > 9 0.147236 10.10.2.10 ? 10.10.2.1 RADIUS 1415 Access-Request > id=4 > 10 0.163300 10.10.2.1 ? 10.10.2.10 RADIUS 106 > Access-Challenge id=4 > 11 0.164158 10.10.2.10 ? 10.10.2.1 RADIUS 1372 Access-Request > id=5 > 12 0.265514 10.10.2.1 ? 10.10.2.10 RADIUS 161 > Access-Challenge id=5 > 13 0.266328 10.10.2.10 ? 10.10.2.1 RADIUS 191 Access-Request > id=6 > 14 0.284607 10.10.2.1 ? 10.10.2.10 RADIUS 226 Access-Accept id=6 > > Question: How to avoid altering fragment_size to get this working ? > > Some clients could not be set so easily like phones. > > Thank you. > > Mikhael. > > -- Kindest regards, Tom Smyth.
