x2go-dev June 2010

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27 participants
92 discussions

Compensating for heavy packet loss environments
by John A. Sullivan III 03 Jun '10

03 Jun '10

We have some clients who are experiencing heavy packet loss on their Internet connection. As a result, their X2Go sessions regularly hang and then take forever to time-out. Their other Internet traffic is much more resilient. This sounds like an SSH problem which does have a problem with lossy environments. We've started testing with changing the sshd_config to have: ClientAliveCountMax 12 ClientAliveInterval 5 Any other suggestions or experiences in using X2Go in high packet loss environments? Thanks - John

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Fwd: x2go with ldap, but no login
by michel 01 Jun '10

01 Jun '10

-------- Original Message -------- Subject: x2go with ldap, but no login Date: Tue, 1 Jun 2010 06:37:46 +0200 From: lug limbe <lug.limbe(a)gmail.com> To: kamerun(a)immerda.ch, "lug.limbe" <lug.limbe(a)gmail.com> hello, first a question: i will come in europe in july august, september, last year i participate to a x2go meeting in germany, it was very nice and helpfull for me. if it exist something similar (workshop, seminar, ...) please tell me, i woud like to participate. as we quasi promise, we install x2go with ldap. we install x2go with x2go-home on ubuntu and x2go-one with debian without ldap without problems. we want to have 2 x2goserver with load balance, it would be very nice, because if a server is not working, we can still work with the other server, if both are working, with load balance it should help for better performance. so we tryto install x2go with ldap. it has taken more than 2 days: we have a 128 kbs connection, but the worse ist the current, which stop every 20-30 minutes when the rain is heavyl falling down (we are in the raining season. it seems to work fine, but when i want to start a client (PXE) i come until the login, but it appears only the icon to shutdown and nothing else. as you can see in syslog and better understand as i, slapd is working, every 5 seconds happens something it seems to close the connection */ /* /*May 31 22:52:21 x2goserver slapd[2295]: conn=8928 fd=22 closed*/ and this address* 0.0.0.0*:636 seems me not correct /May 31 22:52:21 x2goserver slapd[2295]: conn=8929 fd=22 ACCEPT from IP=//127.0.1.1:60306/ <http://127.0.1.1:60306>/ *(IP=*//*0.0.0.0:636*/ <http://0.0.0.0:636>/*)*/ below we put the the tcpdump on eth1 /May 31 22:52:16 x2goserver slapd[2295]: conn=8927 op=1 SRCH base="ou=People,o=planetexpress,c=de" scope=1 deref=0 filter="(&(objectClass=shadowAccount)(uid=postgres))" May 31 22:52:16 x2goserver slapd[2295]: conn=8927 op=1 SRCH attr=uid userPassword shadowLastChange shadowMax shadowMin shadowWarning shadowInactive shadowExpire shadowFlag May 31 22:52:16 x2goserver slapd[2295]: <= bdb_equality_candidates: (uid) not indexed May 31 22:52:16 x2goserver slapd[2295]: conn=8927 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= May 31 22:52:16 x2goserver slapd[2295]: conn=8927 fd=22 closed (connection lost) May 31 22:52:21 x2goserver slapd[2295]: conn=8928 fd=22 ACCEPT from IP=//127.0.1.1:60305/ <http://127.0.1.1:60305>/ (IP=//0.0.0.0:636/ <http://0.0.0.0:636>/) May 31 22:52:21 x2goserver slapd[2295]: conn=8928 fd=22 TLS established tls_ssf=128 ssf=128 May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=0 BIND dn="cn=ldapadmin,o=planetexpress,c=de" method=128 May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=0 BIND dn="cn=ldapadmin,o=planetexpress,c=de" mech=SIMPLE ssf=0 May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=0 RESULT tag=97 err=0 text= May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=1 SRCH base="ou=People,o=planetexpress,c=de" scope=2 deref=0 filter="(&(objectClass=posixAccount)(uid=postgres))" May 31 22:52:21 x2goserver slapd[2295]: <= bdb_equality_candidates: (uid) not indexed May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= May 31 22:52:21 x2goserver slapd[2295]: conn=8928 op=2 UNBIND May 31 22:52:21 x2goserver slapd[2295]: conn=8928 fd=22 closed May 31 22:52:21 x2goserver slapd[2295]: conn=8929 fd=22 ACCEPT from IP=//127.0.1.1:60306/ <http://127.0.1.1:60306>/ (IP=//0.0.0.0:636/ <http://0.0.0.0:636>/) May 31 22:52:21 x2goserver slapd[2295]: conn=8929 fd=22 TLS established tls_ssf=128 ssf=128 May 31 22:52:21 x2goserver slapd[2295]: conn=8929 op=0 BIND dn="" method=128 May 31 22:52:21 x2goserver slapd[2295]: conn=8929 op=0 RESULT tag=97 err=0 text= May 31 22:52:21 x2goserver slapd[2295]: conn=8929 op=1 SRCH base="ou=People,o=planetexpress,c=de" scope=1 deref=0 filter="(&(objectClass=shadowAccount)(uid=postgres))" May 31 22:52:21 x2goserver slapd[2295]: conn=8929 op=1 SRCH attr=uid userPassword shadowLastChange shadowMax shadowMin shadowWarning shadowInactive shadowExpire shadowFlag May 31 22:52:21 x2goserver slapd[2295]: <= bdb_equality_candidates: (uid) not indexed May 31 22:52:21 x2goserver slapd[2295]: conn=8929 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= May 31 22:52:21 x2goserver slapd[2295]: conn=8929 fd=22 closed (connection lost) May 31 22:52:26 x2goserver slapd[2295]: conn=8930 fd=22 ACCEPT from IP=//127.0.1.1:60307/ <http://127.0.1.1:60307>/ (IP=//0.0.0.0:636/ <http://0.0.0.0:636>/) May 31 22:52:26 x2goserver slapd[2295]: conn=8930 fd=22 TLS established tls_ssf=128 ssf=128 May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=0 BIND dn="cn=ldapadmin,o=planetexpress,c=de" method=128 May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=0 BIND dn="cn=ldapadmin,o=planetexpress,c=de" mech=SIMPLE ssf=0 May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=0 RESULT tag=97 err=0 text= May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=1 SRCH base="ou=People,o=planetexpress,c=de" scope=2 deref=0 filter="(&(objectClass=posixAccount)(uid=postgres))" May 31 22:52:26 x2goserver slapd[2295]: <= bdb_equality_candidates: (uid) not indexed May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= May 31 22:52:26 x2goserver slapd[2295]: conn=8930 op=2 UNBIND May 31 22:52:26 x2goserver slapd[2295]: conn=8930 fd=22 closed May 31 22:52:27 x2goserver slapd[2295]: conn=8931 fd=22 ACCEPT from IP=//127.0.1.1:60308/ <http://127.0.1.1:60308>/ (IP=//0.0.0.0:636/ <http://0.0.0.0:636>/) May 31 22:52:27 x2goserver slapd[2295]: conn=8931 fd=22 TLS established tls_ssf=128 ssf=128 May 31 22:52:27 x2goserver slapd[2295]: conn=8931 op=0 BIND dn="" method=128 May 31 22:52:27 x2goserver slapd[2295]: conn=8931 op=0 RESULT tag=97 err=0 text= May 31 22:52:27 x2goserver slapd[2295]: conn=8931 op=1 SRCH base="ou=People,o=planetexpress,c=de" scope=1 deref=0 filter="(&(objectClass=shadowAccount)(uid=postgres))" May 31 22:52:27 x2goserver slapd[2295]: conn=8931 op=1 SRCH attr=uid userPassword shadowLastChange shadowMax shadowMin shadowWarning shadowInactive shadowExpire shadowFlag May 31 22:52:27 x2goserver slapd[2295]: <= bdb_equality_candidates: (uid) not indexed May 31 22:52:27 x2goserver slapd[2295]: conn=8931 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= May 31 22:52:27 x2goserver slapd[2295]: conn=8931 fd=22 closed (connection lost) / and tcpdump on eth1 /22:37:10.670815 IP x2goserver.local.nfs > 192.168.0.100.147730080: reply ok 116 getattr [|nfs] 22:37:10.674699 IP 192.168.0.100.164507296 > x2goserver.local.nfs: 112 getattr [|nfs] 22:37:10.674896 IP x2goserver.local.nfs > 192.168.0.100.164507296: reply ok 116 getattr [|nfs] 22:37:10.679737 IP 192.168.0.100.181284512 > x2goserver.local.nfs: 112 getattr [|nfs] 22:37:10.679912 IP x2goserver.local.nfs > 192.168.0.100.181284512: reply ok 116 getattr [|nfs] 22:37:10.683758 IP 192.168.0.100.198061728 > x2goserver.local.nfs: 112 getattr [|nfs] 22:37:10.683912 IP x2goserver.local.nfs > 192.168.0.100.198061728: reply ok 116 getattr [|nfs] 22:37:10.687996 IP 192.168.0.100.214838944 > x2goserver.local.nfs: 112 getattr [|nfs] 22:37:10.688051 IP x2goserver.local.nfs > 192.168.0.100.214838944: reply ok 116 getattr [|nfs] 22:37:10.688916 IP 192.168.0.100.231616160 > x2goserver.local.nfs: 112 getattr [|nfs] 22:37:10.688957 IP x2goserver.local.nfs > 192.168.0.100.231616160: reply ok 116 getattr [|nfs] 22:37:10.728423 IP 192.168.0.100.939 > x2goserver.local.nfs: . ack 87897 win 41418 <nop,nop,timestamp 4294900216 5304737> ^C 712 packets captured 712 packets received by filter 0 packets dropped by kernel x2goserver:/home/michel# / i don't understand what is *x2goserver.local.nfs* i can ping x2gonserver and x2goserver.local but not x2goserver.local.nfs i hope somebody can help us in name of the "Association of Linux Friends" in limbe cameroon michel

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x2go-dev June 2010