SOLVED Re: [CentOS] Need basic PPPoE startup help

Wed Jul 9 19:41:45 UTC 2008

I did a lot of googling today and made two changes, got brave, rebooted 
and everything is working.

Everything was ready and right in my ifcfg-ppp0 for IPv4, just needed 
the ONBOOT=yes

And IPv6 allocation needed in ifcfg-ppp0:

IPV6INIT=yes
PPPD_EXTRA="ipv6 ,"

Not the later can be placed in /etc/ppp/options, but I thought it better 
to keep all PPPoE customizations in one place.

Robert Moskowitz wrote:
> I need basic PPPoE startup help.
>
> adsl-start DID bring up my PPPoE link (ppp0) to my ISP over eth0 via 
> the DSL modem/bridge. My IPv4 CIDR block is routing and Shorewall is 
> doing the firewalling.
>
> But shorewall has to be started after ppp0 is up and working. For now 
> this means running shorewall restart (or start?). Shorewall 4.2 will 
> have a way to restart shorewall without recompiling, I learned on the 
> their list.
>
> In /etc/sysconfig/network-scripts/ifcfg-ppp0 I have:
>
> BOOTPROTO=dialup
> NAME=DSLppp0
> DEVICE=ppp0
> TYPE=xDSL
> ONBOOT=no
>
> Should ONBOOT be changed to yes, or is there some startup script that 
> I should add the
>
> /sbin/adsl-start ppp0
>
> command line followed with the shorewall restart command?
>
> I am away at IEEE 802 plenary meeting next week, and I need this to be 
> automated in case of system glitches.
>
> Also sometimes the Speedstream just stops forwarding datagrams. 
> Supposedly if it overheats. This requires a power recycle for the 
> speedstream (and my ISP will not use anything else for the modem 
> services). I suspect this will glich the PPPoE connection as well, so 
> I will need some sort of watchdog and a restart of ppp0 and Shorewall. 
> Attached is a rather large script of a user that I picked up on the 
> Shorewall list for some Linux distro. I am NOT a script reader, let 
> alone writer. Should I use this (how would I modify it for Centos and 
> a ppp0 interface) and where would I place it to run as needed?
>
> =======================================================
>
> #!/usr/bin/perl -w
>
> #THIS SCRIPT CREATED BY EJM (alias Erik Mundall) IN ORDER TO MAINTAIN 
> A CONSTANT CONNECTION WITH THE TWO
> #PPPOE ADSL LINES WHICH HAVE PROVEN TO BE UNRELIABLE/UNSTABLE. 15 
> APRIL 2008
> #
> #THIS PROGRAM NEEDS TO FOLLOW THE FOLLOWING ROUTINE IN ORDER TO 
> MAINTAIN CONNECTIVITY OF THE TWO PPPOE LINES
> #AND TO SHARE THE INTERNET LOAD ACROSS THOSE AND ACROSS THE STATIC LINE
> #
> #THE STATIC SHOULD NEVER FAIL. THIS SCRIPT IS INTENDED TO ADDRESS ONLY 
> THE INSTABILITY OF THE TWO PPPOE
> #LINES, AND WILL DO NOTHING FOR THE STATIC LINE IF IT SHOULD FAIL.
> #
> #
> #STEP ONE: THE PROGRAM SHOULD IDENTIFY THE LINE(S) THAT ARE DOWN, IF 
> ANY, AND ISOLATE THEM.
> #STEP TWO: THE PROGRAM SHOULD RECONFIGURE AND RESTART SHOREWALL TO 
> MATCH THE LINES THAT ARE UP.
> #STEP THREE: THE PROGRAM SHOULD FOCUS ON RESTORING THE DROPPED PPPOE 
> LINE(S).
> #STEP FOUR: THE PROGRAM MUST REPEAT STEP TWO ONCE STEP THREE HAS 
> SUCCEEDED.
>
> ###############################################
> # REQUIRED VARIABLES. THESE MUST BE SET PROPERLY!!!
> our $admin_email =q`your_email_address at your_domain_name.com`;
> our $domain_name = "your_domain_name.com";
> our $GATEWAY_1 = 'x.x.x.x'; #GATEWAY OF PPP0 LINE
> our $GATEWAY_2 = 'x.x.x.x'; #GATEWAY OF PPP1 LINE
> our $IPADDRESS_1 = 'x.x.x.x'; #STATIC IP ADDRESS OF PPP0 LINE 
> (ASSIGNED BY ISP)
> our $IPADDRESS_2 = 'x.x.x.x'; #STATIC IP ADDRESS OF PPP1 LINE 
> (ASSIGNED BY ISP)
>
> our $DEBUG=1; #SET THIS TO 1 FOR DEBUGGING, 0 TO TURN DEBUGGING OFF
> our $DEBFILE='/var/log/ppp/debug.log'; #THE /var/log/ppp DIRECTORY 
> MUST EXIST FOR THE DEBUG FILE
> our $logfile='/var/log/ppp/maint.log'; #THE /var/log/ppp DIRECTORY 
> MUST EXIST FOR LOGGING.
>
> ###############################################
> # BELOW THIS LINE, NOTHING MORE SHOULD NEED TO BE CONFIGURED.
> our @ifconf = ();
> our @iprout = `/sbin/ip route`;
> our $p1;
> our $p2;
> our $ppp0=0;
> our $ppp1=0;
> our $FAILED='FALSE';
> our $FAIL='TRUE';
> our $attempt=0;
> our $date='';
> our @data=();
> our @updata=();
> our @log=();
> our @total_log=();
> our $cur_day=0;
> our $cur_month=0;
> our $cur_year=0;
> our $late_day=0;
> our $late_month=0;
> our $late_year=0;
> our 
> %months=(Jan,1,Feb,2,Mar,3,Apr,4,May,5,Jun,6,Jul,7,Aug,8,Sep,9,Oct,10,Nov,11,Dec,12); 
>
> our $start_time=`/bin/date`;
> our $stop_time;
>
> #############################################
> ### SAFEGUARD AGAINST MULTIPLE PROCESSES! ###
> #############################################
> our @pslist = `/bin/ps auxw`;
> our $line='';
> our $scripts=0;
>
> foreach $line(@pslist) {
> if ($line=~s/(ppp-line-maintenance\.pl)/$1/) { #THIS SCRIPT MUST NOT 
> BE RENAMED, OR IF IT IS, THIS LINE MUST BE ADJUSTED ACCORDINGLY!!!!
> $scripts++;
> if ($DEBUG==1) {print "Line:$line\nScripts:$scripts\n" };
> };
> };
> if ($scripts<=2) { #CONTINUE THIS SCRIPT IF ONLY ONE OCCURRENCE (THIS 
> ONE) OF THIS SCRIPT IN CURRENT PROCESS LIST
>
>
> #############
> ### BEGIN ###
> #############
> if ($DEBUG==1) {open DLOG, ">$DEBFILE" or die "Cannot open debugging 
> file!\n"};
>
>
> &ping1;
> &ping2;
> &checkdowned;
> &trimlog;
>
> if ($DEBUG==1) {close DLOG};
>
> } #END 'CONTINUE SCRIPT'
>
> sleep 2;
>
> exit;
>
>
> ###################################################################################################### 
>
> ### SUBROUTINES ###
> ###################
>
> sub ping1 {
> $p1=`/bin/ping -c 3 $GATEWAY_1`;
> if ($p1=~s/100\%\spacket\sloss//) {$p1='DOWN'};
> if ($p1=~s/unreachable//) {$p1='DOWN'};
> if ($DEBUG==1) {print DLOG "p1:$p1\n"};
> return $p1;
> };
>
> sub ping2 {
> $p2=`/bin/ping -c 3 $GATEWAY_2`; if ($p2=~s/100\%\spacket\sloss//) 
> {$p2='DOWN'};
> if ($p2=~s/unreachable//) {$p2='DOWN'};
> if ($DEBUG==1) {print DLOG "p2:$p2\n"};
> return $p2;
> };
>
>
> sub trimlog {
> ################
> ### TRIM LOG ###
> ################
> # THIS PRUNES THE LOG FILE TO JUST THE PREVIOUS THREE MONTH PERIOD.
> open DATA, "<$logfile" or die "Cannot read PPP maint log file!\n";
> @data = <DATA>;
> close DATA;
> $date = `/bin/date`;
> #$cur_month = 
> (Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec)[(localtime)[4]];
> $cur_month = (localtime)[4];
> $cur_year = (localtime)[5]; $cur_year+=1900;
> $cur_day = (localtime)[3];
> #PPP Check: Wed Jan 30 09:20:01 CST 2008 [sample from log]
> foreach $line(@data) {
> if ($line=~m/PPP\sCheck:\s\w{3}\s(\w{3})\s(\d{2}).{14}(\d{4})/) {
> $late_month=$months{$1}; $late_day=$2; $late_year=$3;
> if ( ($late_year==$cur_year) && ( (($cur_month-$late_month)>=3) && 
> ($late_day<=$cur_day) ) ) {@updata=()}
> elsif ( ($late_year<$cur_year) && ( (($late_month-$cur_month)<=9) && 
> ($late_day<=$cur_day) ) ) {@updata=()}
> else { push @updata, $line }
> } else { push @updata, $line };
> }
> open DATA, ">$logfile" or die "Cannot write PPP maint log file!\n";
> print DATA @updata;
> close DATA;
> ################### END TRIM LOG
> };
>
> ##############################
> ### Check for Downed Lines ###
> ##############################
>
> sub checkdowned {
> while ($FAIL eq 'TRUE') {
> @ifconf=();
> @ifconf = `/sbin/ifconfig`;
> $FAIL='FALSE';
>
> while (@ifconf) {
> $line=shift @ifconf;
> if ($line=~m/ppp0/) {
> if ($DEBUG==1) {print DLOG "PPPO:$ppp0 "};
>
> $ppp0=1;
> if ($DEBUG==1) {print DLOG "PPPO:$ppp0 "};
>
> $line=shift @ifconf;
> if ($line=~m/$IPADDRESS_1/) {$ppp0+=2};
> if ($DEBUG==1) {print DLOG "PPPO:$ppp0 "};
> $line=shift @ifconf;
> if ($line=~m/UP /) {$ppp0+=4};
> if ($DEBUG==1) {print DLOG "PPPO:$ppp0\n"};
> };
> if ($line=~m/ppp1/) {
> if ($DEBUG==1) {print DLOG "PPP1:$ppp1 "};
> $ppp1=1;
> if ($DEBUG==1) {print DLOG "PPP1:$ppp1 "};
> $line=shift @ifconf;
> if ($line=~m/$IPADDRESS_2/) {$ppp1+=2};
> if ($DEBUG==1) {print DLOG "PPP1:$ppp1 "};
> $line=shift @ifconf;
> if ($line=~m/UP /) {$ppp1+=4};
> if ($DEBUG==1) {print DLOG "PPP1:$ppp1\n"};
> print $line
> };
> }
>
> $attempt++;
> if ($DEBUG==1) {print "ATTEMPT: $attempt\n"};
> if ($FAILED eq 'TRUE') {push @log, "Attempt#:$attempt > PPP0:$ppp0 
> PPP1:$ppp1\n"};
>
> if ($ppp0<7) {
> if ($DEBUG==1) {print "$ppp0: Restarting ppp0 line by ifdown/ifup 
> commands...\n"};
> system("/sbin/ifdown ppp0");
> sleep 3;
> system("/sbin/ifup ppp0");
> };
> if ($ppp1<7) {
> if ($DEBUG==1) {print "$ppp1: Restarting ppp1 line by ifdown/ifup 
> commands...\n"};
> system("/sbin/ifdown ppp1");
> sleep 3;
> system("/sbin/ifup ppp1");
> };
> if ($FAILED eq 'TRUE') {
> push @log, `/bin/date`."\n";
> push @log, @iprout."\n\n";
> open LOG, ">>$logfile";
> print LOG @log;
> close LOG;
> }
> push @total_log, @log;
> @log=();
>
> my $testppp0=ping0;
> my $testppp1=ping1;
> if ($DEBUG==1) {print "testppp0: $testppp0 testppp1:$testppp1\n"};
> if (($testppp0 eq 'DOWN') || ($testppp1 eq 'DOWN')) { $FAIL='TRUE' };
> if ($FAIL eq 'TRUE') {$FAILED='TRUE'};
> if ($DEBUG==1) {print DLOG "FAIL:$FAIL\n"};
>
>
> if ($FAILED eq 'TRUE') {
>
> system("/etc/init.d/shorewall", "restart");
> system("/etc/init.d/snmpd restart");
> open LOG, ">>$logfile" or die "Cannot open PPP maint log file!\n";
> print LOG @log;
> close LOG;
> push @total_log, @log;
> $stop_time=`/bin/date`;
>
> ######################################################################################################### 
>
> #NOW, SEND AN EMAIL OR CAUSE AN ERROR SO THAT CRON WILL EMAIL THE 
> SYSADMIN A NOTICE OF THIS NECESSITY!!!
> system("/bin/mail -t <<EOF
> To: $admin_email
> From: pppoe-maintenance\@$domain_name
> Subject: PPPoE Dropped Connection Restored!\n\n
>
> A PPPoE Connection was dropped or was lost. It should now be restored. 
> The restoration of the line began at:
>
> $start_time -- and finished at -- $stop_time.
>
> Here is the log from this process:
>
> @total_log
>
> END OF REPORT.
>
> EOF
> ");
> ############################################################################################################ 
>
>
> } else {
>
> open LOG, ">>$logfile" or die "Cannot open PPP maint log file!\n";
> print LOG "PPP Check: ".`/bin/date`;
> close LOG;
> }; #END IF FAILED
> } #END WHILE FAIL
>
> print "SUCCEEDED AFTER $attempt ATTEMPTS!\n";
> } #END SUB CHECKDOWNED
>
>
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