Forum Discussion
bofh_32498
Nimbostratus
Nimbostratuslinux client hangs up (ubuntu 8.10)
I have the strangest problems connecting my Ubuntu 8.10 with firefox 3 successfully.
1st Problem is the connection device:
- Internal connection (using eth0 over the intranet allthough this makes no sense at all) is working fine.
- eth0 or wlan0: using an external connection I get a connection succeeded and a hang up within 2-10.5 minutes depending on the connection (dsl or direct internet).
- using my 3g card gives me 10.5 minutes exactely before it hangs up.
This is what I've checked so far:
- reinstalling the client did not solve, problem seems to be more on the pppd side.
- sslvpn.err shows: SSLVpn::svpn: error 18 ( I cannot find any information on that )
- pppd.dbg shows (ip addresses deleted):
using channel 3
Using interface ppp0
Connect: ppp0 <--> /dev/pts/1
sent [LCP ConfReq id=0x1 ]
rcvd [LCP ConfReq id=0x1 ]
sent [LCP ConfAck id=0x1 ]
rcvd [LCP ConfAck id=0x1 ]
sent [LCP EchoReq id=0x0 magic=0xf89ac497]
sent [CCP ConfReq id=0x1 ]
sent [IPCP ConfReq id=0x1 ]
rcvd [LCP EchoReq id=0x0 magic=0x7235a788]
sent [LCP EchoRep id=0x0 magic=0xf89ac497]
rcvd [IPCP ConfReq id=0x1 ]
sent [IPCP ConfRej id=0x1 ]
rcvd [CCP ConfReq id=0x1 ]
sent [CCP ConfRej id=0x1 ]
rcvd [LCP EchoRep id=0x0 magic=0x7235a788]
rcvd [CCP ConfRej id=0x1 ]
sent [CCP ConfReq id=0x2]
rcvd [IPCP ConfAck id=0x1 ]
rcvd [IPCP ConfReq id=0x2 ]
sent [IPCP ConfAck id=0x2 ]
Cannot determine ethernet address for proxy ARP
local IP address xxx.xxx.xxx.xxx
remote IP address xxx.xxx.xxx.xxx
Script /etc/ppp/ip-up started (pid 8760)
rcvd [CCP ConfReq id=0x2]
sent [CCP ConfAck id=0x2]
Script /etc/ppp/ip-up finished (pid 8760), status = 0x0
rcvd [CCP ConfAck id=0x2]
No response to 2 echo-requests
Serial link appears to be disconnected.
Connect time 2.0 minutes.
Sent 7314 bytes, received 13330 bytes.
Script /etc/ppp/ip-down started (pid 8871)
sent [LCP TermReq id=0x2 "Peer not responding"]
Script /etc/ppp/ip-down finished (pid 8871), status = 0x0
sent [LCP TermReq id=0x3 "Peer not responding"]
Connection terminated.
Modem hangup
- tcpdump shows the server just stops responding after a while
- Windows clients work no problem.
I am completely clueless here and am searching for a workaraound... pls help
1 Reply
mal_57091Hi There,
It looks like you hit a DPD timer (Dead Peer Detection). FirePass uses SSL encrypted PPP connections. PDP is doing using LCP-echo packets over the PPP connection between the client and the FirePass. FirePass will send one LCP-echo every 30 seconds and upon four un-acknowledge LCP-echo's (2 minutes) will consider the peer dead and reap the connection.
The best way to troubleshoot this (in my experience) is run a TCPDump on the actual PPP interface (e.g.: tcpdump -s0 -i pppX) created by FirePass and look for the LCP-echo and responses. Hopefully from here you should be able to figure this one out.
Cheers,
Mal
