X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=grml-terminalserver;h=458b203c1a899b6909a2ce058fd64a6f979c0959;hb=744835b3f429c89983adc3d83c27f5a1baebb7fe;hp=20bfe2937ffc63ca2388ca70556d0d2b13d51249;hpb=33f3e8b9ad7534baf738cc239e750e76c18055a1;p=grml-terminalserver.git

diff --git a/grml-terminalserver b/grml-terminalserver
index 20bfe29..458b203 100755
--- a/grml-terminalserver
+++ b/grml-terminalserver
@@ -135,21 +135,50 @@ function runDhcp
 # make sure tcp/113 is rejected
 function runIptables
 {
- # something keeps answering all tftp requests with auth requests (SYN
- # packets to the client tcp/113). Since the PXE client doesn't answer with
- # RST, the auth query has to wait until it times out. Forbidding the
- # terminalserver to send out packets to tcp/113 via iptables _greatly_
- # speeds up the process. But of course the real fix would be to have grml
- # stop sending out auth queries to tftp clients. according to netstat, it
- # is in.tftpd itself sending out the auth queries.
- # Thanks to Marc Haber and Wolfgang Karall for noticing and current fix.
  if [ -x /sbin/iptables ] ; then
-    if iptables -L | grep -q '^REJECT.*tcp-reset' ; then
+    # something keeps answering all tftp requests with auth requests (SYN
+    # packets to the client tcp/113). Since the PXE client doesn't answer with
+    # RST, the auth query has to wait until it times out. Forbidding the
+    # terminalserver to send out packets to tcp/113 via iptables _greatly_
+    # speeds up the process. But of course the real fix would be to have grml
+    # stop sending out auth queries to tftp clients. according to netstat, it
+    # is in.tftpd itself sending out the auth queries.
+    # Thanks to Marc Haber and Wolfgang Karall for noticing and current fix.
+    if iptables -L | grep -q '^REJECT.*tcp dpt:auth reject-with tcp-reset' ; then
        echo "Rule for tcp/113 already present, nothing to be done."
     else
-       echo -n "Rejecting tcp/113 via iptables to speed up speed up booting via PXE: "
+       echo "Rejecting tcp/113 via iptables to speed up booting via PXE, running:"
+       echo -n '* iptables -A OUTPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset ... '
        iptables -A OUTPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset && echo done || echo failed
     fi
+    # deactivate Multicast-DNS
+    if iptables -L | grep -q '^REJECT.*dpt:mdns reject-with icmp-port-unreachable' ; then
+       echo "Rule for udp/5353 already present, nothing to be done."
+    else
+       echo "Rejecting udp/5353 via iptables for deactivating Multicast-DNS, running:"
+       echo -n '* iptables -A OUTPUT -p udp -d 224.0.0.0/8 --dport 5353 -j REJECT ... '
+       iptables -A OUTPUT -p udp -d 224.0.0.0/8 --dport 5353 -j REJECT && echo done || echo failed
+    fi
+    if [ "$NAT_INTERFACE_" != "none" ]; then
+       local nat_source_ip_=`netGetIp "$NAT_INTERFACE_" warn`
+
+       if iptables -t nat -vnL POSTROUTING | grep -q "SNAT.*${NAT_INTERFACE_}.*to:${nat_source_ip_}" ; then
+          echo "Rule for SNAT already present, nothing to be done."
+       else
+          echo "Setting up SNAT for terminalserver clients on ${NAT_INTERFACE_}:"
+          echo    "* iptables -t nat -F POSTROUTING"
+          echo -n "* iptables -t nat -A POSTROUTING -o $NAT_INTERFACE_ -j SNAT --to-source $nat_source_ip_ ... "
+          { iptables -t nat -F POSTROUTING && \
+            iptables -t nat -A POSTROUTING -o "$NAT_INTERFACE_" -j SNAT --to-source "$nat_source_ip_" ; } && \
+            echo done || echo failed
+       fi
+       if [ `cat /proc/sys/net/ipv4/ip_forward` -eq 1 ]; then
+          echo "IP-Forwarding already enabled, nothing to be done."
+       else
+          echo -n "Enabling IP-Forwarding: "
+          echo 1 > /proc/sys/net/ipv4/ip_forward && echo done || echo failed
+       fi
+    fi
  else
     warn "iptables executable not avilable"
  fi