iperf test with default window size to stargrid04.rhic.bnl.gov,
pdsfgrid5.nersc.gov.  Single thread.  This test done after
the ipchain settings were restore from default after reboot.

Summary:
stargrid04:  20 kB/s  (same as before ipchains restored but
now .rhic.gov works instead of .rcf.gov)

pdsfgrid5 53% iperf -c stargrid04.rcf.bnl.gov -t 1000 -i 10 -p 21000 -P 1
------------------------------------------------------------
Client connecting to stargrid04.rcf.bnl.gov, TCP port 21000
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  5] local 128.55.24.30 port 33023 connected with 130.199.6.109 port 21000
write2 failed: Connection reset by peer
[  5]  0.0- 8.4 sec  62.2 KBytes  60.4 Kbits/sec
pdsfgrid5 54% iperf -c stargrid04.rhic.bnl.gov -t 1000 -i 10 -p 21000 -P 1
------------------------------------------------------------
Client connecting to stargrid04.rhic.bnl.gov, TCP port 21000
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  5] local 128.55.24.30 port 33025 connected with 130.199.80.179 port 21000
[  5]  0.0-10.0 sec    368 KBytes    301 Kbits/sec
[  5] 10.0-20.0 sec    304 KBytes    249 Kbits/sec
[  5] 20.0-30.0 sec    280 KBytes    229 Kbits/sec
[  5] 30.0-40.0 sec    304 KBytes    249 Kbits/sec
[  5] 40.0-50.0 sec    272 KBytes    223 Kbits/sec
[  5] 50.0-60.0 sec    304 KBytes    249 Kbits/sec
[  5] 60.0-70.0 sec    280 KBytes    229 Kbits/sec
[  5] 70.0-80.0 sec    296 KBytes    242 Kbits/sec
[  5] 80.0-90.0 sec    312 KBytes    256 Kbits/sec
[  5] 90.0-100.0 sec    320 KBytes    262 Kbits/sec
[  5] 100.0-110.0 sec    280 KBytes    229 Kbits/sec
[  5] 110.0-120.0 sec    296 KBytes    242 Kbits/sec
[  5] 120.0-130.0 sec    304 KBytes    249 Kbits/sec
[  5] 130.0-140.0 sec    312 KBytes    256 Kbits/sec
[  5] 140.0-150.0 sec    288 KBytes    236 Kbits/sec
[  5] 150.0-160.0 sec    280 KBytes    229 Kbits/sec
[  5] 160.0-170.0 sec    256 KBytes    210 Kbits/sec
[  5] 170.0-180.0 sec    280 KBytes    229 Kbits/sec
[  5] 180.0-190.0 sec    312 KBytes    256 Kbits/sec
[  5] 190.0-200.0 sec    288 KBytes    236 Kbits/sec
[  5] 200.0-210.0 sec    280 KBytes    229 Kbits/sec
[  5] 210.0-220.0 sec    304 KBytes    249 Kbits/sec
[  5] 220.0-230.0 sec    288 KBytes    236 Kbits/sec
[  5] 230.0-240.0 sec    280 KBytes    229 Kbits/sec
[  5] 240.0-250.0 sec    312 KBytes    256 Kbits/sec
[  5] 250.0-260.0 sec    296 KBytes    242 Kbits/sec
[  5] 260.0-270.0 sec    280 KBytes    229 Kbits/sec
[  5] 270.0-280.0 sec    280 KBytes    229 Kbits/sec
[  5] 280.0-290.0 sec    280 KBytes    229 Kbits/sec
[  5] 290.0-300.0 sec    288 KBytes    236 Kbits/sec
[  5] 300.0-310.0 sec    320 KBytes    262 Kbits/sec
[  5] 310.0-320.0 sec    272 KBytes    223 Kbits/sec
[  5] 320.0-330.0 sec    304 KBytes    249 Kbits/sec
[  5] 330.0-340.0 sec    288 KBytes    236 Kbits/sec
[  5] 340.0-350.0 sec    288 KBytes    236 Kbits/sec
[  5] 350.0-360.0 sec    272 KBytes    223 Kbits/sec
[  5] 360.0-370.0 sec    288 KBytes    236 Kbits/sec
[  5] 370.0-380.0 sec    296 KBytes    242 Kbits/sec
[  5] 380.0-390.0 sec    288 KBytes    236 Kbits/sec
[  5] 390.0-400.0 sec    320 KBytes    262 Kbits/sec
[  5] 400.0-410.0 sec    280 KBytes    229 Kbits/sec
[  5] 410.0-420.0 sec    312 KBytes    256 Kbits/sec
[  5] 420.0-430.0 sec    304 KBytes    249 Kbits/sec
[  5] 430.0-440.0 sec    288 KBytes    236 Kbits/sec
[  5] 440.0-450.0 sec    312 KBytes    256 Kbits/sec
[  5] 450.0-460.0 sec    280 KBytes    229 Kbits/sec
[  5] 460.0-470.0 sec    248 KBytes    203 Kbits/sec
[  5] 470.0-480.0 sec    304 KBytes    249 Kbits/sec
[  5] 480.0-490.0 sec    304 KBytes    249 Kbits/sec
[  5] 490.0-500.0 sec    280 KBytes    229 Kbits/sec
[  5] 500.0-510.0 sec    288 KBytes    236 Kbits/sec
[  5] 510.0-520.0 sec    312 KBytes    256 Kbits/sec
[  5] 520.0-530.0 sec    304 KBytes    249 Kbits/sec
[  5] 530.0-540.0 sec    280 KBytes    229 Kbits/sec
[  5] 540.0-550.0 sec    320 KBytes    262 Kbits/sec
[  5] 550.0-560.0 sec    264 KBytes    216 Kbits/sec
[  5] 560.0-570.0 sec    272 KBytes    223 Kbits/sec
[  5] 570.0-580.0 sec    320 KBytes    262 Kbits/sec
[  5] 580.0-590.0 sec    312 KBytes    256 Kbits/sec
[  5] 590.0-600.0 sec    296 KBytes    242 Kbits/sec
[  5] 600.0-610.0 sec    256 KBytes    210 Kbits/sec
[  5] 610.0-620.0 sec    312 KBytes    256 Kbits/sec
[  5] 620.0-630.0 sec    280 KBytes    229 Kbits/sec
[  5] 630.0-640.0 sec    280 KBytes    229 Kbits/sec
[  5] 640.0-650.0 sec    264 KBytes    216 Kbits/sec
[  5] 650.0-660.0 sec    304 KBytes    249 Kbits/sec
[  5] 660.0-670.0 sec    312 KBytes    256 Kbits/sec
[  5] 670.0-680.0 sec    296 KBytes    242 Kbits/sec
[  5] 680.0-690.0 sec    304 KBytes    249 Kbits/sec
[  5] 690.0-700.0 sec    304 KBytes    249 Kbits/sec
[  5] 700.0-710.0 sec    288 KBytes    236 Kbits/sec
[  5] 710.0-720.0 sec    280 KBytes    229 Kbits/sec
[  5] 720.0-730.0 sec    304 KBytes    249 Kbits/sec
[  5] 730.0-740.0 sec    288 KBytes    236 Kbits/sec
[  5] 740.0-750.0 sec    272 KBytes    223 Kbits/sec
[  5] 750.0-760.0 sec    280 KBytes    229 Kbits/sec
[  5] 760.0-770.0 sec    264 KBytes    216 Kbits/sec
[  5] 770.0-780.0 sec    280 KBytes    229 Kbits/sec
[  5] 780.0-790.0 sec    264 KBytes    216 Kbits/sec
[  5] 790.0-800.0 sec    288 KBytes    236 Kbits/sec
[  5] 800.0-810.0 sec    296 KBytes    242 Kbits/sec
[  5] 810.0-820.0 sec    264 KBytes    216 Kbits/sec
[  5] 820.0-830.0 sec    304 KBytes    249 Kbits/sec
[  5] 830.0-840.0 sec    280 KBytes    229 Kbits/sec
[  5] 840.0-850.0 sec    320 KBytes    262 Kbits/sec
[  5] 850.0-860.0 sec    288 KBytes    236 Kbits/sec
[  5] 860.0-870.0 sec    304 KBytes    249 Kbits/sec
[  5] 870.0-880.0 sec    280 KBytes    229 Kbits/sec
[  5] 880.0-890.0 sec    280 KBytes    229 Kbits/sec
[  5] 890.0-900.0 sec    296 KBytes    242 Kbits/sec
[  5] 900.0-910.0 sec    320 KBytes    262 Kbits/sec
[  5] 910.0-920.0 sec    304 KBytes    249 Kbits/sec
[  5] 920.0-930.0 sec    296 KBytes    242 Kbits/sec
[  5] 930.0-940.0 sec    288 KBytes    236 Kbits/sec
[  5] 940.0-950.0 sec    296 KBytes    242 Kbits/sec
[  5] 950.0-960.0 sec    280 KBytes    229 Kbits/sec
[  5] 960.0-970.0 sec    328 KBytes    269 Kbits/sec
[  5] 970.0-980.0 sec    320 KBytes    262 Kbits/sec
[  5] 980.0-990.0 sec    296 KBytes    242 Kbits/sec
[  5] 990.0-1000.0 sec    312 KBytes    256 Kbits/sec