Florin Popovici wrote: > Silly idea: poate serverul de POP3 incearca un ident request (113/tcp > sau poate udp) pe IP-ul de la care te conectezi, si poate mai e setat > sa faca si retry. Si atunci daca firewallu tau are REJECT pe 113, > treaba dureaza <1secunda; daca ai DROP, treaba dureaza poate >1 minut, > adica >timeoutul setat pt conexiunea POP3.
Firewall-ul nu prea joaca rol, ca am incercat cu si fara acesta. Plus ca nu este nici un timeout, am lasat telnetul pornit si nici dupa zeci de minute nu s-a intamplat nimic, astepta raspunsul la PASS. Oricum, am incercat tcpdump -i ppp0 port 113, si nimic nu a fost afisat. Am dat si un tcpdump pe port 110 pe o masina de pe care merge si pe una pe care nu. Rezultatele. tcpdump unde merge: 03:24:47.476139 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: S 1752339782:1752339782(0) win 5840 <mss 1460,sackOK,timestamp 2174411198 0,nop,wscale 0> 03:24:47.559795 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: S 3897861269:3897861269(0) ack 1752339783 win 10136 <nop,nop,timestamp 170028396 2174411198,nop,wscale 0,nop,nop,sackOK,mss 1460> 03:24:47.559841 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: . ack 1 win 5840 <nop,nop,timestamp 2174411206 170028396> 03:24:47.654165 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: P 1:14(13) ack 1 win 10136 <nop,nop,timestamp 170028405 2174411206> 03:24:47.654194 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: . ack 14 win 5840 <nop,nop,timestamp 2174411216 170028405> 03:24:50.401816 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: P 1:12(11) ack 14 win 5840 <nop,nop,timestamp 2174411491 170028405> 03:24:50.485935 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: . ack 12 win 10136 <nop,nop,timestamp 170028689 2174411491> 03:24:50.486434 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: P 14:47(33) ack 12 win 10136 <nop,nop,timestamp 170028689 2174411491> 03:24:50.486462 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: . ack 47 win 5840 <nop,nop,timestamp 2174411499 170028689> 03:24:53.255879 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: P 12:23(11) ack 47 win 5840 <nop,nop,timestamp 2174411776 170028689> 03:24:53.436144 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: . ack 23 win 10136 <nop,nop,timestamp 170028984 2174411776> 03:25:03.336574 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: P 47:103(56) ack 23 win 10136 <nop,nop,timestamp 170029974 2174411776> 03:25:03.336609 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: . ack 103 win 5840 <nop,nop,timestamp 2174412784 170029974> 03:25:03.420544 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: FP 103:172(69) ack 23 win 10136 <nop,nop,timestamp 170029982 2174412784> 03:25:03.420795 IP XXXX.48802 > smtpdelivery.easystreet.com.pop3: F 23:23(0) ack 173 win 5840 <nop,nop,timestamp 2174412792 170029982> 03:25:03.504172 IP smtpdelivery.easystreet.com.pop3 > XXXX.48802: . ack 24 win 10136 <nop,nop,timestamp 170029990 2174412792> Si tcpdump unde nu merge: tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on ppp0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes 13:26:04.346172 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: S 3074448513:3074448513(0) win 5840 <mss 1460,sackOK,timestamp 13326271 0,nop,wscale 7> 13:26:04.693241 IP smtpdelivery.easystreet.com.pop3 > XXXX.zappmobile.ro.5705: S 457895595:457895595(0) ack 3074448514 win 10136 <nop,nop,timestamp 170036104 13326271,nop,wscale 0,nop,nop,sackOK,mss 1460> 13:26:04.693306 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: . ack 1 win 46 <nop,nop,timestamp 13326358 170036104> 13:26:05.026190 IP smtpdelivery.easystreet.com.pop3 > XXXX.zappmobile.ro.5705: P 1:14(13) ack 1 win 10136 <nop,nop,timestamp 170036136 13326358> 13:26:05.026241 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: . ack 14 win 46 <nop,nop,timestamp 13326441 170036136> 13:26:07.198511 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: P 1:12(11) ack 14 win 46 <nop,nop,timestamp 13326984 170036136> 13:26:07.529787 IP smtpdelivery.easystreet.com.pop3 > XXXX.zappmobile.ro.5705: . ack 12 win 10136 <nop,nop,timestamp 170036386 13326984> 13:26:07.529789 IP smtpdelivery.easystreet.com.pop3 > XXXX.zappmobile.ro.5705: P 14:47(33) ack 12 win 10136 <nop,nop,timestamp 170036386 13326984> 13:26:07.529847 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: . ack 47 win 46 <nop,nop,timestamp 13327067 170036386> 13:26:09.728409 IP XXXX.zappmobile.ro.5705 > smtpdelivery.easystreet.com.pop3: P 12:23(11) ack 47 win 46 <nop,nop,timestamp 13327617 170036386> 13:26:10.152364 IP smtpdelivery.easystreet.com.pop3 > XXXX.zappmobile.ro.5705: . ack 23 win 10136 <nop,nop,timestamp 170036650 13327617> Andras -- Quanta Plus developer - http://quanta.kdewebdev.org K Desktop Environment - http://www.kde.org _______________________________________________ RLUG mailing list [email protected] http://lists.lug.ro/mailman/listinfo/rlug
