+ # 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