🚀 go-pugleaf

On Tue, 19 Mar 2002, Bob Wightman <Bob@pattindaughter.demon.co.uk> wrote:
> I am having some trouble trying to set up my Internet connection via
> dialup. My ISP is the UK provider Demon who assign static IP addresses
> so this should be slightly simpler. They use PAP authorisation.
> 
> I am using SuSE 7.2 on a Dell Dimension using an external modem.
> 
> The symptoms are that I am able to dial up the server but am unable to
> ping any named machine both within demon's network and across other
> networks. I am able to browse the web for a short while. Then the
> connection is severed. This may be anything from 3 to 6 minutes from the
> time the connection is made.

(snip)
> Mar 19 20:52:26 linux pppd[780]: local  IP address 158.152.147.15
> Mar 19 20:52:26 linux pppd[780]: remote IP address 158.152.1.222
> Mar 19 20:52:26 linux pppd[780]: Script /etc/ppp/ip-up started (pid 785)
> Mar 19 20:52:26 linux pppd[780]: Script /etc/ppp/ip-up finished (pid
> 785), status = 0x0
> Mar 19 20:52:52 linux pppd[780]: sent [LCP EchoReq id=0x1
> magic=0xb31984a5]
> Mar 19 20:52:52 linux pppd[780]: rcvd [LCP EchoRep id=0x1
> magic=0x4828151b]
> Mar 19 20:53:22 linux pppd[780]: sent [LCP EchoReq id=0x2
> magic=0xb31984a5]
> Mar 19 20:53:52 linux pppd[780]: sent [LCP EchoReq id=0x3
> magic=0xb31984a5]
> Mar 19 20:54:22 linux pppd[780]: sent [LCP EchoReq id=0x4
> magic=0xb31984a5]
> Mar 19 20:54:52 linux pppd[780]: sent [LCP EchoReq id=0x5
> magic=0xb31984a5]
> Mar 19 20:55:22 linux pppd[780]: No response to 4 echo-requests
> Mar 19 20:55:22 linux pppd[780]: Serial link appears to be disconnected.

Notice that your ISP is not responding to EchoReq and that appears to be
what is disconnecting you.  Try disabling that by setting
lcp-echo-interval 0 (or commenting out that and lcp-echo-failure) in
/etc/ppp/options.


Whatever is blocking that might also explain why you cannot ping anything.
But nothing says that an internet host has to respond to ping.  Many hosts
and nameservers have that disabled to avoid ping flood attacks and other
probes.  For example our company mail server does not respond to ping or
traceroute, but sends and receives mail fine.

-- 
David Efflandt - All spam ignored
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